alxarafe / alixar

htdocs/contrat/contact.php

Spacing +1 added lines, -1 removed lines

@@ -54,7 +54,7 @@
 // Initialize technical object to manage hooks of page. Note that conf->hooks_modules contains array of hook context
 $hookmanager->initHooks(array('contractcontactcard', 'globalcard'));
 
-$permissiontoadd   = $user->hasRight('contrat', 'creer');     //  Used by the include of actions_addupdatedelete.inc.php and actions_lineupdown.inc.php
+$permissiontoadd = $user->hasRight('contrat', 'creer'); //  Used by the include of actions_addupdatedelete.inc.php and actions_lineupdown.inc.php
 
 $result = restrictedArea($user, 'contrat', $object->id);
 

htdocs/admin/tools/listevents.php

Spacing +1 added lines, -1 removed lines

@@ -44,7 +44,7 @@
 }
 
 // Load translation files required by the page
-$langs->loadLangs(array("companies", "admin", "users", "other","withdrawals"));
+$langs->loadLangs(array("companies", "admin", "users", "other", "withdrawals"));
 
 // Load variable for pagination
 $limit = GETPOSTINT('limit') ? GETPOSTINT('limit') : $conf->liste_limit;

htdocs/core/class/lessc.class.php

Indentation +4330 added lines, -4330 removed lines

@@ -40,4331 +40,4331 @@ 
 class Lessc
 {
 
-	public static $VERSION = "v0.8.0";
-
-	public static $TRUE = array("keyword", "true");
-	public static $FALSE = array("keyword", "false");
-
-	protected $libFunctions = array();
-	protected $registeredVars = array();
-	protected $preserveComments = false;
-
-	public $vPrefix = '@'; // prefix of abstract properties
-	public $mPrefix = '$'; // prefix of abstract blocks
-	public $parentSelector = '&';
-
-	public $importDisabled = false;
-	public $importDir = '';
-
-	public $scope;
-	public $formatter;
-	public $formatterName;
-	public $parser;
-	public $_parseFile;
-	public $env;
-	public $count;
-
-	protected $numberPrecision = null;
-
-	protected $allParsedFiles = array();
-
-	// set to the parser that generated the current line when compiling
-	// so we know how to create error messages
-	protected $sourceParser = null;
-	protected $sourceLoc = null;
-
-	protected static $nextImportId = 0; // uniquely identify imports
-
-	// attempts to find the path of an import url, returns null for css files
-	protected function findImport($url)
-	{
-		foreach ((array) $this->importDir as $dir) {
-			$full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url;
-			if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) {
-				return $file;
-			}
-		}
-
-		return null;
-	}
-
-	/**
-	 * fileExists
-	 *
-	 * @param       string  $name   Filename
-	 * @return      boolean
-	 */
-	protected function fileExists($name)
-	{
-		return is_file($name);
-	}
-
-	public static function compressList($items, $delim)
-	{
-		if (!isset($items[1]) && isset($items[0])) {
-			return $items[0];
-		} else {
-			return array('list', $delim, $items);
-		}
-	}
-
-	public static function preg_quote($what)
-	{
-		return preg_quote($what, '/');
-	}
-
-	protected function tryImport($importPath, $parentBlock, $out)
-	{
-		if ($importPath[0] == "function" && $importPath[1] == "url") {
-			$importPath = $this->flattenList($importPath[2]);
-		}
-
-		$str = $this->coerceString($importPath);
-		if ($str === null) {
-			return false;
-		}
-
-		$url = $this->compileValue($this->lib_e($str));
-
-		// don't import if it ends in css
-		if (substr_compare($url, '.css', -4, 4) === 0) {
-			return false;
-		}
-
-		$realPath = $this->findImport($url);
-
-		if ($realPath === null) {
-			return false;
-		}
-
-		if ($this->importDisabled) {
-			return array(false, "/* import disabled */");
-		}
-
-		if (isset($this->allParsedFiles[realpath($realPath)])) {
-			return array(false, null);
-		}
-
-		$this->addParsedFile($realPath);
-		$parser = $this->makeParser($realPath);
-		$root = $parser->parse(file_get_contents($realPath));
-
-		// set the parents of all the block props
-		foreach ($root->props as $prop) {
-			if ($prop[0] == "block") {
-				$prop[1]->parent = $parentBlock;
-			}
-		}
-
-		// copy mixins into scope, set their parents
-		// bring blocks from import into current block
-		// TODO: need to mark the source parser these came from this file
-		foreach ($root->children as $childName => $child) {
-			if (isset($parentBlock->children[$childName])) {
-				$parentBlock->children[$childName] = array_merge(
-					$parentBlock->children[$childName],
-					$child
-				);
-			} else {
-				$parentBlock->children[$childName] = $child;
-			}
-		}
-
-		$pi = pathinfo($realPath);
-		$dir = $pi["dirname"];
-
-		list($top, $bottom) = $this->sortProps($root->props, true);
-		$this->compileImportedProps($top, $parentBlock, $out, $parser, $dir);
-
-		return array(true, $bottom, $parser, $dir);
-	}
-
-	protected function compileImportedProps($props, $block, $out, $sourceParser, $importDir)
-	{
-		$oldSourceParser = $this->sourceParser;
-
-		$oldImport = $this->importDir;
-
-		// TODO: this is because the importDir api is stupid
-		$this->importDir = (array) $this->importDir;
-		array_unshift($this->importDir, $importDir);
-
-		foreach ($props as $prop) {
-			$this->compileProp($prop, $block, $out);
-		}
-
-		$this->importDir = $oldImport;
-		$this->sourceParser = $oldSourceParser;
-	}
-
-	/**
-	 * Recursively compiles a block.
-	 *
-	 * A block is analogous to a CSS block in most cases. A single LESS document
-	 * is encapsulated in a block when parsed, but it does not have parent tags
-	 * so all of it's children appear on the root level when compiled.
-	 *
-	 * Blocks are made up of props and children.
-	 *
-	 * Props are property instructions, array tuples which describe an action
-	 * to be taken, eg. write a property, set a variable, mixin a block.
-	 *
-	 * The children of a block are just all the blocks that are defined within.
-	 * This is used to look up mixins when performing a mixin.
-	 *
-	 * Compiling the block involves pushing a fresh environment on the stack,
-	 * and iterating through the props, compiling each one.
-	 *
-	 * See Lessc::compileProp()
-	 *
-	 */
-	protected function compileBlock($block)
-	{
-		switch ($block->type) {
-			case "root":
-				$this->compileRoot($block);
-				break;
-			case null:
-				$this->compileCSSBlock($block);
-				break;
-			case "media":
-				$this->compileMedia($block);
-				break;
-			case "directive":
-				$name = "@".$block->name;
-				if (!empty($block->value)) {
-					$name .= " ".$this->compileValue($this->reduce($block->value));
-				}
-
-				$this->compileNestedBlock($block, array($name));
-				break;
-			default:
-				$this->throwError("unknown block type: $block->type\n");
-		}
-	}
-
-	protected function compileCSSBlock($block)
-	{
-		$env = $this->pushEnv();
-
-		$selectors = $this->compileSelectors($block->tags);
-		$env->selectors = $this->multiplySelectors($selectors);
-		$out = $this->makeOutputBlock(null, $env->selectors);
-
-		$this->scope->children[] = $out;
-		$this->compileProps($block, $out);
-
-		$block->scope = $env; // mixins carry scope with them!
-		$this->popEnv();
-	}
-
-	protected function compileMedia($media)
-	{
-		$env = $this->pushEnv($media);
-		$parentScope = $this->mediaParent($this->scope);
-
-		$query = $this->compileMediaQuery($this->multiplyMedia($env));
-
-		$this->scope = $this->makeOutputBlock($media->type, array($query));
-		$parentScope->children[] = $this->scope;
-
-		$this->compileProps($media, $this->scope);
-
-		if (count($this->scope->lines) > 0) {
-			$orphanSelelectors = $this->findClosestSelectors();
-			if (!is_null($orphanSelelectors)) {
-				$orphan = $this->makeOutputBlock(null, $orphanSelelectors);
-				$orphan->lines = $this->scope->lines;
-				array_unshift($this->scope->children, $orphan);
-				$this->scope->lines = array();
-			}
-		}
-
-		$this->scope = $this->scope->parent;
-		$this->popEnv();
-	}
-
-	protected function mediaParent($scope)
-	{
-		while (!empty($scope->parent)) {
-			if (!empty($scope->type) && $scope->type != "media") {
-				break;
-			}
-			$scope = $scope->parent;
-		}
-
-		return $scope;
-	}
-
-	protected function compileNestedBlock($block, $selectors)
-	{
-		$this->pushEnv($block);
-		$this->scope = $this->makeOutputBlock($block->type, $selectors);
-		$this->scope->parent->children[] = $this->scope;
-
-		$this->compileProps($block, $this->scope);
-
-		$this->scope = $this->scope->parent;
-		$this->popEnv();
-	}
-
-	protected function compileRoot($root)
-	{
-		$this->pushEnv();
-		$this->scope = $this->makeOutputBlock($root->type);
-		$this->compileProps($root, $this->scope);
-		$this->popEnv();
-	}
-
-	protected function compileProps($block, $out)
-	{
-		foreach ($this->sortProps($block->props) as $prop) {
-			$this->compileProp($prop, $block, $out);
-		}
-		$out->lines = $this->deduplicate($out->lines);
-	}
-
-	/**
-	 * Deduplicate lines in a block. Comments are not deduplicated. If a
-	 * duplicate rule is detected, the comments immediately preceding each
-	 * occurence are consolidated.
-	 */
-	protected function deduplicate($lines)
-	{
-		$unique = array();
-		$comments = array();
-
-		foreach ($lines as $line) {
-			if (strpos($line, '/*') === 0) {
-				$comments[] = $line;
-				continue;
-			}
-			if (!in_array($line, $unique)) {
-				$unique[] = $line;
-			}
-			array_splice($unique, array_search($line, $unique), 0, $comments);
-			$comments = array();
-		}
-		return array_merge($unique, $comments);
-	}
-
-	protected function sortProps($props, $split = false)
-	{
-		$vars = array();
-		$imports = array();
-		$other = array();
-		$stack = array();
-
-		foreach ($props as $prop) {
-			switch ($prop[0]) {
-				case "comment":
-					$stack[] = $prop;
-					break;
-				case "assign":
-					$stack[] = $prop;
-					if (isset($prop[1][0]) && $prop[1][0] == $this->vPrefix) {
-						$vars = array_merge($vars, $stack);
-					} else {
-						$other = array_merge($other, $stack);
-					}
-					$stack = array();
-					break;
-				case "import":
-					$id = self::$nextImportId++;
-					$prop[] = $id;
-					$stack[] = $prop;
-					$imports = array_merge($imports, $stack);
-					$other[] = array("import_mixin", $id);
-					$stack = array();
-					break;
-				default:
-					$stack[] = $prop;
-					$other = array_merge($other, $stack);
-					$stack = array();
-					break;
-			}
-		}
-		$other = array_merge($other, $stack);
-
-		if ($split) {
-			return array(array_merge($imports, $vars), $other);
-		} else {
-			return array_merge($imports, $vars, $other);
-		}
-	}
-
-	protected function compileMediaQuery($queries)
-	{
-		$compiledQueries = array();
-		foreach ($queries as $query) {
-			$parts = array();
-			foreach ($query as $q) {
-				switch ($q[0]) {
-					case "mediaType":
-						$parts[] = implode(" ", array_slice($q, 1));
-						break;
-					case "mediaExp":
-						if (isset($q[2])) {
-							$parts[] = "($q[1]: ".
-								$this->compileValue($this->reduce($q[2])).")";
-						} else {
-							$parts[] = "($q[1])";
-						}
-						break;
-					case "variable":
-						$parts[] = $this->compileValue($this->reduce($q));
-						break;
-				}
-			}
-
-			if (count($parts) > 0) {
-				$compiledQueries[] = implode(" and ", $parts);
-			}
-		}
-
-		$out = "@media";
-		if (!empty($parts)) {
-			$out .= " ".
-				implode($this->formatter->selectorSeparator, $compiledQueries);
-		}
-		return $out;
-	}
-
-	protected function multiplyMedia($env, $childQueries = null)
-	{
-		if (is_null($env) ||
-			!empty($env->block->type) && $env->block->type != "media"
-		) {
-			return $childQueries;
-		}
-
-		// plain old block, skip
-		if (empty($env->block->type)) {
-			return $this->multiplyMedia($env->parent, $childQueries);
-		}
-
-		$out = array();
-		$queries = $env->block->queries;
-		if (is_null($childQueries)) {
-			$out = $queries;
-		} else {
-			foreach ($queries as $parent) {
-				foreach ($childQueries as $child) {
-					$out[] = array_merge($parent, $child);
-				}
-			}
-		}
-
-		return $this->multiplyMedia($env->parent, $out);
-	}
-
-	protected function expandParentSelectors(&$tag, $replace)
-	{
-		$parts = explode("$&$", $tag);
-		$count = 0;
-		foreach ($parts as &$part) {
-			$c = 0;
-			$part = str_replace($this->parentSelector, $replace, $part, $c);
-			$count += $c;
-		}
-		$tag = implode($this->parentSelector, $parts);
-		return $count;
-	}
-
-	protected function findClosestSelectors()
-	{
-		$env = $this->env;
-		$selectors = null;
-		while ($env !== null) {
-			if (isset($env->selectors)) {
-				$selectors = $env->selectors;
-				break;
-			}
-			$env = $env->parent;
-		}
-
-		return $selectors;
-	}
-
-
-	// multiply $selectors against the nearest selectors in env
-	protected function multiplySelectors($selectors)
-	{
-		// find parent selectors
-
-		$parentSelectors = $this->findClosestSelectors();
-		if (is_null($parentSelectors)) {
-			// kill parent reference in top level selector
-			foreach ($selectors as &$s) {
-				$this->expandParentSelectors($s, "");
-			}
-
-			return $selectors;
-		}
-
-		$out = array();
-		foreach ($parentSelectors as $parent) {
-			foreach ($selectors as $child) {
-				$count = $this->expandParentSelectors($child, $parent);
-
-				// don't prepend the parent tag if & was used
-				if ($count > 0) {
-					$out[] = trim($child);
-				} else {
-					$out[] = trim($parent.' '.$child);
-				}
-			}
-		}
-
-		return $out;
-	}
-
-	// reduces selector expressions
-	protected function compileSelectors($selectors)
-	{
-		$out = array();
-
-		foreach ($selectors as $s) {
-			if (is_array($s)) {
-				list(, $value) = $s;
-				$out[] = trim($this->compileValue($this->reduce($value)));
-			} else {
-				$out[] = $s;
-			}
-		}
-
-		return $out;
-	}
-
-	protected function eq($left, $right)
-	{
-		return $left == $right;
-	}
-
-	protected function patternMatch($block, $orderedArgs, $keywordArgs)
-	{
-		// match the guards if it has them
-		// any one of the groups must have all its guards pass for a match
-		if (!empty($block->guards)) {
-			$groupPassed = false;
-			foreach ($block->guards as $guardGroup) {
-				foreach ($guardGroup as $guard) {
-					$this->pushEnv();
-					$this->zipSetArgs($block->args, $orderedArgs, $keywordArgs);
-
-					$negate = false;
-					if ($guard[0] == "negate") {
-						$guard = $guard[1];
-						$negate = true;
-					}
-
-					$passed = $this->reduce($guard) == self::$TRUE;
-					if ($negate) {
-						$passed = !$passed;
-					}
-
-					$this->popEnv();
-
-					if ($passed) {
-						$groupPassed = true;
-					} else {
-						$groupPassed = false;
-						break;
-					}
-				}
-
-				if ($groupPassed) {
-					break;
-				}
-			}
-
-			if (!$groupPassed) {
-				return false;
-			}
-		}
-
-		if (empty($block->args)) {
-			return $block->isVararg || empty($orderedArgs) && empty($keywordArgs);
-		}
-
-		$remainingArgs = $block->args;
-		if ($keywordArgs) {
-			$remainingArgs = array();
-			foreach ($block->args as $arg) {
-				if ($arg[0] == "arg" && isset($keywordArgs[$arg[1]])) {
-					continue;
-				}
-
-				$remainingArgs[] = $arg;
-			}
-		}
-
-		$i = -1; // no args
-		// try to match by arity or by argument literal
-		foreach ($remainingArgs as $i => $arg) {
-			switch ($arg[0]) {
-				case "lit":
-					if (empty($orderedArgs[$i]) || !$this->eq($arg[1], $orderedArgs[$i])) {
-						return false;
-					}
-					break;
-				case "arg":
-					// no arg and no default value
-					if (!isset($orderedArgs[$i]) && !isset($arg[2])) {
-						return false;
-					}
-					break;
-				case "rest":
-					$i--; // rest can be empty
-					break 2;
-			}
-		}
-
-		if ($block->isVararg) {
-			return true; // not having enough is handled above
-		} else {
-			$numMatched = $i + 1;
-			// greater than because default values always match
-			return $numMatched >= count($orderedArgs);
-		}
-	}
-
-	protected function patternMatchAll($blocks, $orderedArgs, $keywordArgs, $skip = array())
-	{
-		$matches = null;
-		foreach ($blocks as $block) {
-			// skip seen blocks that don't have arguments
-			if (isset($skip[$block->id]) && !isset($block->args)) {
-				continue;
-			}
-
-			if ($this->patternMatch($block, $orderedArgs, $keywordArgs)) {
-				$matches[] = $block;
-			}
-		}
-
-		return $matches;
-	}
-
-	// attempt to find blocks matched by path and args
-	protected function findBlocks($searchIn, $path, $orderedArgs, $keywordArgs, $seen = array())
-	{
-		if ($searchIn == null) {
-			return null;
-		}
-		if (isset($seen[$searchIn->id])) {
-			return null;
-		}
-		$seen[$searchIn->id] = true;
-
-		$name = $path[0];
-
-		if (isset($searchIn->children[$name])) {
-			$blocks = $searchIn->children[$name];
-			if (count($path) == 1) {
-				$matches = $this->patternMatchAll($blocks, $orderedArgs, $keywordArgs, $seen);
-				if (!empty($matches)) {
-					// This will return all blocks that match in the closest
-					// scope that has any matching block, like lessjs
-					return $matches;
-				}
-			} else {
-				$matches = array();
-				foreach ($blocks as $subBlock) {
-					$subMatches = $this->findBlocks(
-						$subBlock,
-						array_slice($path, 1),
-						$orderedArgs,
-						$keywordArgs,
-						$seen
-					);
-
-					if (!is_null($subMatches)) {
-						foreach ($subMatches as $sm) {
-							$matches[] = $sm;
-						}
-					}
-				}
-
-				return count($matches) > 0 ? $matches : null;
-			}
-		}
-		if ($searchIn->parent === $searchIn) {
-			return null;
-		}
-		return $this->findBlocks($searchIn->parent, $path, $orderedArgs, $keywordArgs, $seen);
-	}
-
-	// sets all argument names in $args to either the default value
-	// or the one passed in through $values
-	protected function zipSetArgs($args, $orderedValues, $keywordValues)
-	{
-		$assignedValues = array();
-
-		$i = 0;
-		foreach ($args as $a) {
-			if ($a[0] == "arg") {
-				if (isset($keywordValues[$a[1]])) {
-					// has keyword arg
-					$value = $keywordValues[$a[1]];
-				} elseif (isset($orderedValues[$i])) {
-					// has ordered arg
-					$value = $orderedValues[$i];
-					$i++;
-				} elseif (isset($a[2])) {
-					// has default value
-					$value = $a[2];
-				} else {
-					$value = null; // :(
-					$this->throwError("Failed to assign arg ".$a[1]); // This ends function by throwing an exception
-				}
-
-				$value = $this->reduce($value);
-				$this->set($a[1], $value);
-				$assignedValues[] = $value;
-			} else {
-				// a lit
-				$i++;
-			}
-		}
-
-		// check for a rest
-		$last = end($args);
-		if ($last && $last[0] == "rest") {
-			$rest = array_slice($orderedValues, count($args) - 1);
-			$this->set($last[1], $this->reduce(array("list", " ", $rest)));
-		}
-
-		// wow is this the only true use of PHP's + operator for arrays?
-		$this->env->arguments = $assignedValues + $orderedValues;
-	}
-
-	// compile a prop and update $lines or $blocks appropriately
-	protected function compileProp($prop, $block, $out)
-	{
-		// set error position context
-		$this->sourceLoc = isset($prop[-1]) ? $prop[-1] : -1;
-
-		switch ($prop[0]) {
-			case 'assign':
-				list(, $name, $value) = $prop;
-				if ($name[0] == $this->vPrefix) {
-					$this->set($name, $value);
-				} else {
-					$out->lines[] = $this->formatter->property(
-						$name,
-						$this->compileValue($this->reduce($value))
-					);
-				}
-				break;
-			case 'block':
-				list(, $child) = $prop;
-				$this->compileBlock($child);
-				break;
-			case 'mixin':
-				list(, $path, $args, $suffix) = $prop;
-
-				$orderedArgs = array();
-				$keywordArgs = array();
-				foreach ((array) $args as $arg) {
-					$argval = null;
-					switch ($arg[0]) {
-						case "arg":
-							if (!isset($arg[2])) {
-								$orderedArgs[] = $this->reduce(array("variable", $arg[1]));
-							} else {
-								$keywordArgs[$arg[1]] = $this->reduce($arg[2]);
-							}
-							break;
-
-						case "lit":
-							$orderedArgs[] = $this->reduce($arg[1]);
-							break;
-						default:
-							$this->throwError("Unknown arg type: ".$arg[0]);
-					}
-				}
-
-				$mixins = $this->findBlocks($block, $path, $orderedArgs, $keywordArgs);
-
-				if ($mixins === null) {
-					$this->throwError("{$prop[1][0]} is undefined");
-				}
-
-				foreach ($mixins as $mixin) {
-					if ($mixin === $block && !$orderedArgs) {
-						continue;
-					}
-
-					$haveScope = false;
-					if (isset($mixin->parent->scope)) {
-						$haveScope = true;
-						$mixinParentEnv = $this->pushEnv();
-						$mixinParentEnv->storeParent = $mixin->parent->scope;
-					}
-
-					$haveArgs = false;
-					if (isset($mixin->args)) {
-						$haveArgs = true;
-						$this->pushEnv();
-						$this->zipSetArgs($mixin->args, $orderedArgs, $keywordArgs);
-					}
-
-					$oldParent = $mixin->parent;
-					if ($mixin != $block) {
-						$mixin->parent = $block;
-					}
-
-					foreach ($this->sortProps($mixin->props) as $subProp) {
-						if ($suffix !== null &&
-							$subProp[0] == "assign" &&
-							is_string($subProp[1]) &&
-							$subProp[1][0] != $this->vPrefix
-						) {
-							$subProp[2] = array(
-								'list', ' ',
-								array($subProp[2], array('keyword', $suffix))
-							);
-						}
-
-						$this->compileProp($subProp, $mixin, $out);
-					}
-
-					$mixin->parent = $oldParent;
-
-					if ($haveArgs) {
-						$this->popEnv();
-					}
-					if ($haveScope) {
-						$this->popEnv();
-					}
-				}
-
-				break;
-			case 'raw':
-				$out->lines[] = $prop[1];
-				break;
-			case "directive":
-				list(, $name, $value) = $prop;
-				$out->lines[] = "@$name ".$this->compileValue($this->reduce($value)).';';
-				break;
-			case "comment":
-				$out->lines[] = $prop[1];
-				break;
-			case "import":
-				list(, $importPath, $importId) = $prop;
-				$importPath = $this->reduce($importPath);
-
-				if (!isset($this->env->imports)) {
-					$this->env->imports = array();
-				}
-
-				$result = $this->tryImport($importPath, $block, $out);
-
-				$this->env->imports[$importId] = $result === false ?
-					array(false, "@import ".$this->compileValue($importPath).";") : $result;
-
-				break;
-			case "import_mixin":
-				list(, $importId) = $prop;
-				$import = $this->env->imports[$importId];
-				if ($import[0] === false) {
-					if (isset($import[1])) {
-						$out->lines[] = $import[1];
-					}
-				} else {
-					list(, $bottom, $parser, $importDir) = $import;
-					$this->compileImportedProps($bottom, $block, $out, $parser, $importDir);
-				}
-
-				break;
-			default:
-				$this->throwError("unknown op: {$prop[0]}\n");
-		}
-	}
-
-
-	/**
-	 * Compiles a primitive value into a CSS property value.
-	 *
-	 * Values in lessphp are typed by being wrapped in arrays, their format is
-	 * typically:
-	 *
-	 *     array(type, contents [, additional_contents]*)
-	 *
-	 * The input is expected to be reduced. This function will not work on
-	 * things like expressions and variables.
-	 */
-	public function compileValue($value)
-	{
-		switch ($value[0]) {
-			case 'list':
-				// [1] - delimiter
-				// [2] - array of values
-				return implode($value[1], array_map(array($this, 'compileValue'), $value[2]));
-			case 'raw_color':
-				if (!empty($this->formatter->compressColors)) {
-					return $this->compileValue($this->coerceColor($value));
-				}
-				return $value[1];
-			case 'keyword':
-				// [1] - the keyword
-				return $value[1];
-			case 'number':
-				list(, $num, $unit) = $value;
-				// [1] - the number
-				// [2] - the unit
-				if ($this->numberPrecision !== null) {
-					$num = round($num, $this->numberPrecision);
-				}
-				return $num.$unit;
-			case 'string':
-				// [1] - contents of string (includes quotes)
-				list(, $delim, $content) = $value;
-				foreach ($content as &$part) {
-					if (is_array($part)) {
-						$part = $this->compileValue($part);
-					}
-				}
-				return $delim.implode($content).$delim;
-			case 'color':
-				// [1] - red component (either number or a %)
-				// [2] - green component
-				// [3] - blue component
-				// [4] - optional alpha component
-				list(, $r, $g, $b) = $value;
-				$r = round($r);
-				$g = round($g);
-				$b = round($b);
-
-				if (count($value) == 5 && $value[4] != 1) { // rgba
-					return 'rgba('.$r.','.$g.','.$b.','.$value[4].')';
-				}
-
-				$h = sprintf("#%02x%02x%02x", $r, $g, $b);
-
-				if (!empty($this->formatter->compressColors)) {
-					// Converting hex color to short notation (e.g. #003399 to #039)
-					if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) {
-						$h = '#'.$h[1].$h[3].$h[5];
-					}
-				}
-
-				return $h;
-
-			case 'function':
-				list(, $name, $args) = $value;
-				return $name.'('.$this->compileValue($args).')';
-			default: // assumed to be unit
-				$this->throwError("unknown value type: $value[0]");
-		}
-	}
-
-	protected function lib_pow($args)
-	{
-		list($base, $exp) = $this->assertArgs($args, 2, "pow");
-		return pow($this->assertNumber($base), $this->assertNumber($exp));
-	}
-
-	protected function lib_pi()
-	{
-		return pi();
-	}
-
-	protected function lib_mod($args)
-	{
-		list($a, $b) = $this->assertArgs($args, 2, "mod");
-		return $this->assertNumber($a) % $this->assertNumber($b);
-	}
-
-	protected function lib_tan($num)
-	{
-		return tan($this->assertNumber($num));
-	}
-
-	protected function lib_sin($num)
-	{
-		return sin($this->assertNumber($num));
-	}
-
-	protected function lib_cos($num)
-	{
-		return cos($this->assertNumber($num));
-	}
-
-	protected function lib_atan($num)
-	{
-		$num = atan($this->assertNumber($num));
-		return array("number", $num, "rad");
-	}
-
-	protected function lib_asin($num)
-	{
-		$num = asin($this->assertNumber($num));
-		return array("number", $num, "rad");
-	}
-
-	protected function lib_acos($num)
-	{
-		$num = acos($this->assertNumber($num));
-		return array("number", $num, "rad");
-	}
-
-	protected function lib_sqrt($num)
-	{
-		return sqrt($this->assertNumber($num));
-	}
-
-	protected function lib_extract($value)
-	{
-		list($list, $idx) = $this->assertArgs($value, 2, "extract");
-		$idx = $this->assertNumber($idx);
-		// 1 indexed
-		if ($list[0] == "list" && isset($list[2][$idx - 1])) {
-			return $list[2][$idx - 1];
-		}
-		return '';
-	}
-
-	protected function lib_isnumber($value)
-	{
-		return $this->toBool($value[0] == "number");
-	}
-
-	protected function lib_isstring($value)
-	{
-		return $this->toBool($value[0] == "string");
-	}
-
-	protected function lib_iscolor($value)
-	{
-		return $this->toBool($this->coerceColor($value));
-	}
-
-	protected function lib_iskeyword($value)
-	{
-		return $this->toBool($value[0] == "keyword");
-	}
-
-	protected function lib_ispixel($value)
-	{
-		return $this->toBool($value[0] == "number" && $value[2] == "px");
-	}
-
-	protected function lib_ispercentage($value)
-	{
-		return $this->toBool($value[0] == "number" && $value[2] == "%");
-	}
-
-	protected function lib_isem($value)
-	{
-		return $this->toBool($value[0] == "number" && $value[2] == "em");
-	}
-
-	protected function lib_isrem($value)
-	{
-		return $this->toBool($value[0] == "number" && $value[2] == "rem");
-	}
-
-	protected function lib_rgbahex($color)
-	{
-		$color = $this->coerceColor($color);
-		if (is_null($color)) {
-			$this->throwError("color expected for rgbahex");
-		}
-
-		return sprintf(
-			"#%02x%02x%02x%02x",
-			isset($color[4]) ? $color[4] * 255 : 255,
-			$color[1],
-			$color[2],
-			$color[3]
-		);
-	}
-
-	protected function lib_argb($color)
-	{
-		return $this->lib_rgbahex($color);
-	}
-
-	/**
-	 * Given an url, decide whether to output a regular link or the base64-encoded contents of the file
-	 *
-	 * @param  array  $value either an argument list (two strings) or a single string
-	 * @return string        formatted url(), either as a link or base64-encoded
-	 */
-	protected function lib_data_uri($value)
-	{
-		$mime = ($value[0] === 'list') ? $value[2][0][2] : null;
-		$url = ($value[0] === 'list') ? $value[2][1][2][0] : $value[2][0];
-
-		$fullpath = $this->findImport($url);
-
-		if ($fullpath && ($fsize = filesize($fullpath)) !== false) {
-			// IE8 can't handle data uris larger than 32KB
-			if ($fsize / 1024 < 32) {
-				if (is_null($mime)) {
-					if (class_exists('finfo')) { // php 5.3+
-						$finfo = new finfo(FILEINFO_MIME);
-						$mime = explode('; ', $finfo->file($fullpath));
-						$mime = $mime[0];
-					} elseif (function_exists('mime_content_type')) { // PHP 5.2
-						$mime = mime_content_type($fullpath);
-					}
-				}
-
-				if (!is_null($mime)) { // fallback if the mime type is still unknown
-					$url = sprintf('data:%s;base64,%s', $mime, base64_encode(file_get_contents($fullpath)));
-				}
-			}
-		}
-
-		return 'url("'.$url.'")';
-	}
-
-	// utility func to unquote a string
-	protected function lib_e($arg)
-	{
-		switch ($arg[0]) {
-			case "list":
-				$items = $arg[2];
-				if (isset($items[0])) {
-					return $this->lib_e($items[0]);
-				}
-				$this->throwError("unrecognised input"); // This ends function by throwing an exception
-				// no break
-			case "string":
-				$arg[1] = "";
-				return $arg;
-			case "keyword":
-				return $arg;
-			default:
-				return array("keyword", $this->compileValue($arg));
-		}
-	}
-
-	protected function lib__sprintf($args)
-	{
-		if ($args[0] != "list") {
-			return $args;
-		}
-		$values = $args[2];
-		$string = array_shift($values);
-		$template = $this->compileValue($this->lib_e($string));
-
-		$i = 0;
-		$m = array();
-		if (preg_match_all('/%[dsa]/', $template, $m)) {
-			foreach ($m[0] as $match) {
-				$val = isset($values[$i]) ?
-					$this->reduce($values[$i]) : array('keyword', '');
-
-				// lessjs compat, renders fully expanded color, not raw color
-				if ($color = $this->coerceColor($val)) {
-					$val = $color;
-				}
-
-				$i++;
-				$rep = $this->compileValue($this->lib_e($val));
-				$template = preg_replace(
-					'/'.self::preg_quote($match).'/',
-					$rep,
-					$template,
-					1
-				);
-			}
-		}
-
-		$d = $string[0] == "string" ? $string[1] : '"';
-		return array("string", $d, array($template));
-	}
-
-	protected function lib_floor($arg)
-	{
-		$value = $this->assertNumber($arg);
-		return array("number", floor($value), $arg[2]);
-	}
-
-	protected function lib_ceil($arg)
-	{
-		$value = $this->assertNumber($arg);
-		return array("number", ceil($value), $arg[2]);
-	}
-
-	protected function lib_round($arg)
-	{
-		if ($arg[0] != "list") {
-			$value = $this->assertNumber($arg);
-			return array("number", round($value), $arg[2]);
-		} else {
-			$value = $this->assertNumber($arg[2][0]);
-			$precision = $this->assertNumber($arg[2][1]);
-			return array("number", round($value, $precision), $arg[2][0][2]);
-		}
-	}
-
-	protected function lib_unit($arg)
-	{
-		if ($arg[0] == "list") {
-			list($number, $newUnit) = $arg[2];
-			return array("number", $this->assertNumber($number),
-				$this->compileValue($this->lib_e($newUnit)));
-		} else {
-			return array("number", $this->assertNumber($arg), "");
-		}
-	}
-
-	/**
-	 * Helper function to get arguments for color manipulation functions.
-	 * takes a list that contains a color like thing and a percentage
-	 */
-	public function colorArgs($args)
-	{
-		if ($args[0] != 'list' || count($args[2]) < 2) {
-			return array(array('color', 0, 0, 0), 0);
-		}
-		list($color, $delta) = $args[2];
-		$color = $this->assertColor($color);
-		$delta = (float) $delta[1];
-
-		return array($color, $delta);
-	}
-
-	protected function lib_darken($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-
-		$hsl = $this->toHSL($color);
-		$hsl[3] = $this->clamp($hsl[3] - $delta, 100);
-		return $this->toRGB($hsl);
-	}
-
-	protected function lib_lighten($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-
-		$hsl = $this->toHSL($color);
-		$hsl[3] = $this->clamp($hsl[3] + $delta, 100);
-		return $this->toRGB($hsl);
-	}
-
-	protected function lib_saturate($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-
-		$hsl = $this->toHSL($color);
-		$hsl[2] = $this->clamp($hsl[2] + $delta, 100);
-		return $this->toRGB($hsl);
-	}
-
-	protected function lib_desaturate($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-
-		$hsl = $this->toHSL($color);
-		$hsl[2] = $this->clamp($hsl[2] - $delta, 100);
-		return $this->toRGB($hsl);
-	}
-
-	protected function lib_spin($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-
-		$hsl = $this->toHSL($color);
-
-		$hsl[1] = $hsl[1] + $delta % 360;
-		if ($hsl[1] < 0) {
-			$hsl[1] += 360;
-		}
-
-		return $this->toRGB($hsl);
-	}
-
-	protected function lib_fadeout($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-		$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta / 100);
-		return $color;
-	}
-
-	protected function lib_fadein($args)
-	{
-		list($color, $delta) = $this->colorArgs($args);
-		$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta / 100);
-		return $color;
-	}
-
-	protected function lib_hue($color)
-	{
-		$hsl = $this->toHSL($this->assertColor($color));
-		return round($hsl[1]);
-	}
-
-	protected function lib_saturation($color)
-	{
-		$hsl = $this->toHSL($this->assertColor($color));
-		return round($hsl[2]);
-	}
-
-	protected function lib_lightness($color)
-	{
-		$hsl = $this->toHSL($this->assertColor($color));
-		return round($hsl[3]);
-	}
-
-	// get the alpha of a color
-	// defaults to 1 for non-colors or colors without an alpha
-	protected function lib_alpha($value)
-	{
-		if (!is_null($color = $this->coerceColor($value))) {
-			return isset($color[4]) ? $color[4] : 1;
-		}
-		return '';
-	}
-
-	// set the alpha of the color
-	protected function lib_fade($args)
-	{
-		list($color, $alpha) = $this->colorArgs($args);
-		$color[4] = $this->clamp($alpha / 100.0);
-		return $color;
-	}
-
-	protected function lib_percentage($arg)
-	{
-		$num = $this->assertNumber($arg);
-		return array("number", $num * 100, "%");
-	}
-
-	/**
-	 * Mix color with white in variable proportion.
-	 *
-	 * It is the same as calling `mix(#ffffff, @color, @weight)`.
-	 *
-	 *     tint(@color, [@weight: 50%]);
-	 *
-	 * http://lesscss.org/functions/#color-operations-tint
-	 *
-	 * @return array Color
-	 */
-	protected function lib_tint($args)
-	{
-		$white = ['color', 255, 255, 255];
-		if ($args[0] == 'color') {
-			return $this->lib_mix(['list', ',', [$white, $args]]);
-		} elseif ($args[0] == "list" && count($args[2]) == 2) {
-			return $this->lib_mix([$args[0], $args[1], [$white, $args[2][0], $args[2][1]]]);
-		} else {
-			$this->throwError("tint expects (color, weight)");
-		}
-		return array();
-	}
-
-	/**
-	 * Mix color with black in variable proportion.
-	 *
-	 * It is the same as calling `mix(#000000, @color, @weight)`
-	 *
-	 *     shade(@color, [@weight: 50%]);
-	 *
-	 * http://lesscss.org/functions/#color-operations-shade
-	 *
-	 * @return array Color
-	 */
-	protected function lib_shade($args)
-	{
-		$black = ['color', 0, 0, 0];
-		if ($args[0] == 'color') {
-			return $this->lib_mix(['list', ',', [$black, $args]]);
-		} elseif ($args[0] == "list" && count($args[2]) == 2) {
-			return $this->lib_mix([$args[0], $args[1], [$black, $args[2][0], $args[2][1]]]);
-		} else {
-			$this->throwError("shade expects (color, weight)");
-		}
-		return array();
-	}
-
-	/**
-	 * lib_mix
-	 * mixes two colors by weight
-	 * mix(@color1, @color2, [@weight: 50%]);
-	 * http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
-	 *
-	 * @param array         $args   Args
-	 * @return array
-	 */
-	protected function lib_mix($args)
-	{
-		if ($args[0] != "list" || count($args[2]) < 2) {
-			$this->throwError("mix expects (color1, color2, weight)");
-		}
-
-		list($first, $second) = $args[2];
-		$first = $this->assertColor($first);
-		$second = $this->assertColor($second);
-
-		$first_a = $this->lib_alpha($first);
-		$second_a = $this->lib_alpha($second);
-
-		if (isset($args[2][2])) {
-			$weight = $args[2][2][1] / 100.0;
-		} else {
-			$weight = 0.5;
-		}
-
-		$w = $weight * 2 - 1;
-		$a = $first_a - $second_a;
-
-		$w1 = (($w * $a == -1 ? $w : ($w + $a) / (1 + $w * $a)) + 1) / 2.0;
-		$w2 = 1.0 - $w1;
-
-		$new = array('color',
-			$w1 * $first[1] + $w2 * $second[1],
-			$w1 * $first[2] + $w2 * $second[2],
-			$w1 * $first[3] + $w2 * $second[3],
-		);
-
-		if ($first_a != 1.0 || $second_a != 1.0) {
-			$new[] = $first_a * $weight + $second_a * ($weight - 1);
-		}
-
-		return $this->fixColor($new);
-	}
-
-	/**
-	 * lib_contrast
-	 *
-	 * @param array         $args   Args
-	 * @return array
-	 */
-	protected function lib_contrast($args)
-	{
-		$darkColor  = array('color', 0, 0, 0);
-		$lightColor = array('color', 255, 255, 255);
-		$threshold  = 0.43;
-
-		if ($args[0] == 'list') {
-			$inputColor = (isset($args[2][0])) ? $this->assertColor($args[2][0]) : $lightColor;
-			$darkColor  = (isset($args[2][1])) ? $this->assertColor($args[2][1]) : $darkColor;
-			$lightColor = (isset($args[2][2])) ? $this->assertColor($args[2][2]) : $lightColor;
-			$threshold  = (isset($args[2][3])) ? $this->assertNumber($args[2][3]) : $threshold;
-		} else {
-			$inputColor = $this->assertColor($args);
-		}
-
-		$inputColor = $this->coerceColor($inputColor);
-		$darkColor  = $this->coerceColor($darkColor);
-		$lightColor = $this->coerceColor($lightColor);
-
-		//Figure out which is actually light and dark!
-		if ($this->toLuma($darkColor) > $this->toLuma($lightColor)) {
-			$t = $lightColor;
-			$lightColor = $darkColor;
-			$darkColor  = $t;
-		}
-
-		$inputColor_alpha = $this->lib_alpha($inputColor);
-		if (($this->toLuma($inputColor) * $inputColor_alpha) < $threshold) {
-			return $lightColor;
-		}
-		return $darkColor;
-	}
-
-	private function toLuma($color)
-	{
-		list(, $r, $g, $b) = $this->coerceColor($color);
-
-		$r = $r / 255;
-		$g = $g / 255;
-		$b = $b / 255;
-
-		$r = ($r <= 0.03928) ? $r / 12.92 : pow((($r + 0.055) / 1.055), 2.4);
-		$g = ($g <= 0.03928) ? $g / 12.92 : pow((($g + 0.055) / 1.055), 2.4);
-		$b = ($b <= 0.03928) ? $b / 12.92 : pow((($b + 0.055) / 1.055), 2.4);
-
-		return (0.2126 * $r) + (0.7152 * $g) + (0.0722 * $b);
-	}
-
-	protected function lib_luma($color)
-	{
-		return array("number", round($this->toLuma($color) * 100, 8), "%");
-	}
-
-
-	public function assertColor($value, $error = "expected color value")
-	{
-		$color = $this->coerceColor($value);
-		if (is_null($color)) {
-			$this->throwError($error);
-		}
-		return $color;
-	}
-
-	public function assertNumber($value, $error = "expecting number")
-	{
-		if ($value[0] == "number") {
-			return $value[1];
-		}
-		$this->throwError($error);
-	}
-
-	public function assertArgs($value, $expectedArgs, $name = "")
-	{
-		if ($expectedArgs == 1) {
-			return $value;
-		} else {
-			if ($value[0] !== "list" || $value[1] != ",") {
-				$this->throwError("expecting list");
-			}
-			$values = $value[2];
-			$numValues = count($values);
-			if ($expectedArgs != $numValues) {
-				if ($name) {
-					$name = $name.": ";
-				}
-
-				$this->throwError("{$name}expecting $expectedArgs arguments, got $numValues");
-			}
-
-			return $values;
-		}
-	}
-
-	protected function toHSL($color)
-	{
-		if ($color[0] === 'hsl') {
-			return $color;
-		}
-
-		$r = $color[1] / 255;
-		$g = $color[2] / 255;
-		$b = $color[3] / 255;
-
-		$min = min($r, $g, $b);
-		$max = max($r, $g, $b);
-
-		$L = ($min + $max) / 2;
-		if ($min == $max) {
-			$S = $H = 0;
-		} else {
-			if ($L < 0.5) {
-				$S = ($max - $min) / ($max + $min);
-			} else {
-				$S = ($max - $min) / (2.0 - $max - $min);
-			}
-			if ($r == $max) {
-				$H = ($g - $b) / ($max - $min);
-			} elseif ($g == $max) {
-				$H = 2.0 + ($b - $r) / ($max - $min);
-			} elseif ($b == $max) {
-				$H = 4.0 + ($r - $g) / ($max - $min);
-			}
-		}
-
-		$out = array('hsl',
-			($H < 0 ? $H + 6 : $H) * 60,
-			$S * 100,
-			$L * 100,
-		);
-
-		if (count($color) > 4) {
-			// copy alpha
-			$out[] = $color[4];
-		}
-		return $out;
-	}
-
-	protected function toRGB_helper($comp, $temp1, $temp2)
-	{
-		if ($comp < 0) {
-			$comp += 1.0;
-		} elseif ($comp > 1) {
-			$comp -= 1.0;
-		}
-
-		if (6 * $comp < 1) {
-			return $temp1 + ($temp2 - $temp1) * 6 * $comp;
-		}
-		if (2 * $comp < 1) {
-			return $temp2;
-		}
-		if (3 * $comp < 2) {
-			return $temp1 + ($temp2 - $temp1) * ((2 / 3) - $comp) * 6;
-		}
-
-		return $temp1;
-	}
-
-	/**
-	 * Converts a hsl array into a color value in rgb.
-	 * Expects H to be in range of 0 to 360, S and L in 0 to 100
-	 */
-	protected function toRGB($color)
-	{
-		if ($color[0] === 'color') {
-			return $color;
-		}
-
-		$H = $color[1] / 360;
-		$S = $color[2] / 100;
-		$L = $color[3] / 100;
-
-		if ($S == 0) {
-			$r = $g = $b = $L;
-		} else {
-			$temp2 = $L < 0.5 ?
-				$L * (1.0 + $S) : $L + $S - $L * $S;
-
-			$temp1 = 2.0 * $L - $temp2;
-
-			$r = $this->toRGB_helper($H + 1 / 3, $temp1, $temp2);
-			$g = $this->toRGB_helper($H, $temp1, $temp2);
-			$b = $this->toRGB_helper($H - 1 / 3, $temp1, $temp2);
-		}
-
-		// $out = array('color', round($r*255), round($g*255), round($b*255));
-		$out = array('color', $r * 255, $g * 255, $b * 255);
-		if (count($color) > 4) {
-			// copy alpha
-			$out[] = $color[4];
-		}
-		return $out;
-	}
-
-	protected function clamp($v, $max = 1, $min = 0)
-	{
-		return min($max, max($min, $v));
-	}
-
-	/**
-	 * Convert the rgb, rgba, hsl color literals of function type
-	 * as returned by the parser into values of color type.
-	 */
-	protected function funcToColor($func)
-	{
-		$fname = $func[1];
-		if ($func[2][0] != 'list') {
-			// need a list of arguments
-			return false;
-		}
-		$rawComponents = $func[2][2];
-
-		if ($fname == 'hsl' || $fname == 'hsla') {
-			$hsl = array('hsl');
-			$i = 0;
-			foreach ($rawComponents as $c) {
-				$val = $this->reduce($c);
-				$val = isset($val[1]) ? (float) $val[1] : 0;
-
-				if ($i == 0) {
-					$clamp = 360;
-				} elseif ($i < 3) {
-					$clamp = 100;
-				} else {
-					$clamp = 1;
-				}
-
-				$hsl[] = $this->clamp($val, $clamp);
-				$i++;
-			}
-
-			while (count($hsl) < 4) {
-				$hsl[] = 0;
-			}
-			return $this->toRGB($hsl);
-
-		} elseif ($fname == 'rgb' || $fname == 'rgba') {
-			$components = array();
-			$i = 1;
-			foreach ($rawComponents as $c) {
-				$c = $this->reduce($c);
-				if ($i < 4) {
-					if ($c[0] == "number" && $c[2] == "%") {
-						$components[] = 255 * ($c[1] / 100);
-					} else {
-						$components[] = (float) $c[1];
-					}
-				} elseif ($i == 4) {
-					if ($c[0] == "number" && $c[2] == "%") {
-						$components[] = 1.0 * ($c[1] / 100);
-					} else {
-						$components[] = (float) $c[1];
-					}
-				} else {
-					break;
-				}
-
-				$i++;
-			}
-			while (count($components) < 3) {
-				$components[] = 0;
-			}
-			array_unshift($components, 'color');
-			return $this->fixColor($components);
-		}
-
-		return false;
-	}
-
-	protected function reduce($value, $forExpression = false)
-	{
-		switch ($value[0]) {
-			case "interpolate":
-				$reduced = $this->reduce($value[1]);
-				$var = $this->compileValue($reduced);
-				$res = $this->reduce(array("variable", $this->vPrefix.$var));
-
-				if ($res[0] == "raw_color") {
-					$res = $this->coerceColor($res);
-				}
-
-				if (empty($value[2])) {
-					$res = $this->lib_e($res);
-				}
-
-				return $res;
-			case "variable":
-				$key = $value[1];
-				if (is_array($key)) {
-					$key = $this->reduce($key);
-					$key = $this->vPrefix.$this->compileValue($this->lib_e($key));
-				}
-
-				$seen = & $this->env->seenNames;
-
-				if (!empty($seen[$key])) {
-					$this->throwError("infinite loop detected: $key");
-				}
-
-				$seen[$key] = true;
-				$out = $this->reduce($this->get($key));
-				$seen[$key] = false;
-				return $out;
-			case "list":
-				foreach ($value[2] as &$item) {
-					$item = $this->reduce($item, $forExpression);
-				}
-				return $value;
-			case "expression":
-				return $this->evaluate($value);
-			case "string":
-				foreach ($value[2] as &$part) {
-					if (is_array($part)) {
-						$strip = $part[0] == "variable";
-						$part = $this->reduce($part);
-						if ($strip) {
-							$part = $this->lib_e($part);
-						}
-					}
-				}
-				return $value;
-			case "escape":
-				list(, $inner) = $value;
-				return $this->lib_e($this->reduce($inner));
-			case "function":
-				$color = $this->funcToColor($value);
-				if ($color) {
-					return $color;
-				}
-
-				list(, $name, $args) = $value;
-				if ($name == "%") {
-					$name = "_sprintf";
-				}
-
-				$f = isset($this->libFunctions[$name]) ?
-					$this->libFunctions[$name] : array($this, 'lib_'.str_replace('-', '_', $name));
-
-				if (is_callable($f)) {
-					if ($args[0] == 'list') {
-						$args = self::compressList($args[2], $args[1]);
-					}
-
-					$ret = call_user_func($f, $this->reduce($args, true), $this);
-
-					if (is_null($ret)) {
-						return array("string", "", array(
-							$name, "(", $args, ")"
-						));
-					}
-
-					// convert to a typed value if the result is a php primitive
-					if (is_numeric($ret)) {
-						$ret = array('number', $ret, "");
-					} elseif (!is_array($ret)) {
-						$ret = array('keyword', $ret);
-					}
-
-					return $ret;
-				}
-
-				// plain function, reduce args
-				$value[2] = $this->reduce($value[2]);
-				return $value;
-			case "unary":
-				list(, $op, $exp) = $value;
-				$exp = $this->reduce($exp);
-
-				if ($exp[0] == "number") {
-					switch ($op) {
-						case "+":
-							return $exp;
-						case "-":
-							$exp[1] *= -1;
-							return $exp;
-					}
-				}
-				return array("string", "", array($op, $exp));
-		}
-
-		if ($forExpression) {
-			switch ($value[0]) {
-				case "keyword":
-					if ($color = $this->coerceColor($value)) {
-						return $color;
-					}
-					break;
-				case "raw_color":
-					return $this->coerceColor($value);
-			}
-		}
-
-		return $value;
-	}
-
-
-	// coerce a value for use in color operation
-	protected function coerceColor($value)
-	{
-		switch ($value[0]) {
-			case 'color':
-				return $value;
-			case 'raw_color':
-				$c = array("color", 0, 0, 0);
-				$colorStr = substr($value[1], 1);
-				$num = hexdec($colorStr);
-				$width = strlen($colorStr) == 3 ? 16 : 256;
-
-				for ($i = 3; $i > 0; $i--) { // 3 2 1
-					$t = intval($num) % $width;
-					$num /= $width;
-
-					$c[$i] = $t * (256 / $width) + $t * floor(16/$width);
-				}
-
-				return $c;
-			case 'keyword':
-				$name = $value[1];
-				if (isset(self::$cssColors[$name])) {
-					$rgba = explode(',', self::$cssColors[$name]);
-
-					if (isset($rgba[3])) {
-						return array('color', $rgba[0], $rgba[1], $rgba[2], $rgba[3]);
-					}
-					return array('color', $rgba[0], $rgba[1], $rgba[2]);
-				}
-				return null;
-		}
-		return null;
-	}
-
-	// make something string like into a string
-	protected function coerceString($value)
-	{
-		switch ($value[0]) {
-			case "string":
-				return $value;
-			case "keyword":
-				return array("string", "", array($value[1]));
-		}
-		return null;
-	}
-
-	// turn list of length 1 into value type
-	protected function flattenList($value)
-	{
-		if ($value[0] == "list" && count($value[2]) == 1) {
-			return $this->flattenList($value[2][0]);
-		}
-		return $value;
-	}
-
-	public function toBool($a)
-	{
-		return $a ? self::$TRUE : self::$FALSE;
-	}
-
-	// evaluate an expression
-	protected function evaluate($exp)
-	{
-		list(, $op, $left, $right, $whiteBefore, $whiteAfter) = $exp;
-
-		$left = $this->reduce($left, true);
-		$right = $this->reduce($right, true);
-
-		if ($leftColor = $this->coerceColor($left)) {
-			$left = $leftColor;
-		}
-
-		if ($rightColor = $this->coerceColor($right)) {
-			$right = $rightColor;
-		}
-
-		$ltype = $left[0];
-		$rtype = $right[0];
-
-		// operators that work on all types
-		if ($op == "and") {
-			return $this->toBool($left == self::$TRUE && $right == self::$TRUE);
-		}
-
-		if ($op == "=") {
-			return $this->toBool($this->eq($left, $right));
-		}
-
-		if ($op == "+" && !is_null($str = $this->stringConcatenate($left, $right))) {
-			return $str;
-		}
-
-		// type based operators
-		$fname = "op_{$ltype}_{$rtype}";
-		if (is_callable(array($this, $fname))) {
-			$out = $this->$fname($op, $left, $right);
-			if (!is_null($out)) {
-				return $out;
-			}
-		}
-
-		// make the expression look it did before being parsed
-		$paddedOp = $op;
-		if ($whiteBefore) {
-			$paddedOp = " ".$paddedOp;
-		}
-		if ($whiteAfter) {
-			$paddedOp .= " ";
-		}
-
-		return array("string", "", array($left, $paddedOp, $right));
-	}
-
-	protected function stringConcatenate($left, $right)
-	{
-		if ($strLeft = $this->coerceString($left)) {
-			if ($right[0] == "string") {
-				$right[1] = "";
-			}
-			$strLeft[2][] = $right;
-			return $strLeft;
-		}
-
-		if ($strRight = $this->coerceString($right)) {
-			array_unshift($strRight[2], $left);
-			return $strRight;
-		}
-		return '';
-	}
-
-
-	// make sure a color's components don't go out of bounds
-	protected function fixColor($c)
-	{
-		foreach (range(1, 3) as $i) {
-			if ($c[$i] < 0) {
-				$c[$i] = 0;
-			}
-			if ($c[$i] > 255) {
-				$c[$i] = 255;
-			}
-		}
-
-		return $c;
-	}
-
-	protected function op_number_color($op, $lft, $rgt)
-	{
-		if ($op == '+' || $op == '*') {
-			return $this->op_color_number($op, $rgt, $lft);
-		}
-		return array();
-	}
-
-	protected function op_color_number($op, $lft, $rgt)
-	{
-		if ($rgt[0] == '%') {
-			$rgt[1] /= 100;
-		}
-
-		return $this->op_color_color(
-			$op,
-			$lft,
-			array_fill(1, count($lft) - 1, $rgt[1])
-		);
-	}
-
-	protected function op_color_color($op, $left, $right)
-	{
-		$out = array('color');
-		$max = count($left) > count($right) ? count($left) : count($right);
-		foreach (range(1, $max - 1) as $i) {
-			$lval = isset($left[$i]) ? $left[$i] : 0;
-			$rval = isset($right[$i]) ? $right[$i] : 0;
-			switch ($op) {
-				case '+':
-					$out[] = $lval + $rval;
-					break;
-				case '-':
-					$out[] = $lval - $rval;
-					break;
-				case '*':
-					$out[] = $lval * $rval;
-					break;
-				case '%':
-					$out[] = $lval % $rval;
-					break;
-				case '/':
-					if ($rval == 0) {
-						$this->throwError("evaluate error: can't divide by zero");
-					}
-					$out[] = $lval / $rval;
-					break;
-				default:
-					$this->throwError('evaluate error: color op number failed on op '.$op);
-			}
-		}
-		return $this->fixColor($out);
-	}
-
-	public function lib_red($color)
-	{
-		$color = $this->coerceColor($color);
-		if (is_null($color)) {
-			$this->throwError('color expected for red()');
-		}
-
-		return $color[1];
-	}
-
-	public function lib_green($color)
-	{
-		$color = $this->coerceColor($color);
-		if (is_null($color)) {
-			$this->throwError('color expected for green()');
-		}
-
-		return $color[2];
-	}
-
-	public function lib_blue($color)
-	{
-		$color = $this->coerceColor($color);
-		if (is_null($color)) {
-			$this->throwError('color expected for blue()');
-		}
-
-		return $color[3];
-	}
-
-
-	// operator on two numbers
-	protected function op_number_number($op, $left, $right)
-	{
-		$unit = empty($left[2]) ? $right[2] : $left[2];
-
-		$value = 0;
-		switch ($op) {
-			case '+':
-				$value = $left[1] + $right[1];
-				break;
-			case '*':
-				$value = $left[1] * $right[1];
-				break;
-			case '-':
-				$value = $left[1] - $right[1];
-				break;
-			case '%':
-				$value = $left[1] % $right[1];
-				break;
-			case '/':
-				if ($right[1] == 0) {
-					$this->throwError('parse error: divide by zero');
-				}
-				$value = $left[1] / $right[1];
-				break;
-			case '<':
-				return $this->toBool($left[1] < $right[1]);
-			case '>':
-				return $this->toBool($left[1] > $right[1]);
-			case '>=':
-				return $this->toBool($left[1] >= $right[1]);
-			case '=<':
-				return $this->toBool($left[1] <= $right[1]);
-			default:
-				$this->throwError('parse error: unknown number operator: '.$op);
-		}
-
-		return array("number", $value, $unit);
-	}
-
-
-	/* environment functions */
-
-	protected function makeOutputBlock($type, $selectors = null)
-	{
-		$b = new stdclass();
-		$b->lines = array();
-		$b->children = array();
-		$b->selectors = $selectors;
-		$b->type = $type;
-		$b->parent = $this->scope;
-		return $b;
-	}
-
-	// the state of execution
-	protected function pushEnv($block = null)
-	{
-		$e = new stdclass();
-		$e->parent = $this->env;
-		$e->store = array();
-		$e->block = $block;
-
-		$this->env = $e;
-		return $e;
-	}
-
-	// pop something off the stack
-	protected function popEnv()
-	{
-		$old = $this->env;
-		$this->env = $this->env->parent;
-		return $old;
-	}
-
-	// set something in the current env
-	protected function set($name, $value)
-	{
-		$this->env->store[$name] = $value;
-	}
-
-
-	// get the highest occurrence entry for a name
-	protected function get($name)
-	{
-		$current = $this->env;
-
-		$isArguments = $name == $this->vPrefix.'arguments';
-		while ($current) {
-			if ($isArguments && isset($current->arguments)) {
-				return array('list', ' ', $current->arguments);
-			}
-
-			if (isset($current->store[$name])) {
-				return $current->store[$name];
-			}
-
-			$current = isset($current->storeParent) ?
-				$current->storeParent : $current->parent;
-		}
-
-		$this->throwError("variable $name is undefined");
-	}
-
-	// inject array of unparsed strings into environment as variables
-	protected function injectVariables($args)
-	{
-		$this->pushEnv();
-		$parser = new lessc_parser($this, __METHOD__);
-		$value = null;
-		foreach ($args as $name => $strValue) {
-			if ($name[0] !== '@') {
-				$name = '@'.$name;
-			}
-			$parser->count = 0;
-			$parser->buffer = (string) $strValue;
-			if (!$parser->propertyValue($value)) {
-				throw new Exception("failed to parse passed in variable $name: $strValue");
-			}
-
-			$this->set($name, $value);
-		}
-	}
-
-	/**
-	 * Initialize any static state, can initialize parser for a file
-	 * $opts isn't used yet
-	 */
-	public function __construct($fname = null)
-	{
-		if ($fname !== null) {
-			// used for deprecated parse method
-			$this->_parseFile = $fname;
-		}
-	}
-
-	public function compile($string, $name = null)
-	{
-		$locale = setlocale(LC_NUMERIC, 0);
-		setlocale(LC_NUMERIC, "C");
-
-		$this->parser = $this->makeParser($name);
-		$root = $this->parser->parse($string);
-
-		$this->env = null;
-		$this->scope = null;
-
-		$this->formatter = $this->newFormatter();
-
-		if (!empty($this->registeredVars)) {
-			$this->injectVariables($this->registeredVars);
-		}
-
-		$this->sourceParser = $this->parser; // used for error messages
-		$this->compileBlock($root);
-
-		ob_start();
-		$this->formatter->block($this->scope);
-		$out = ob_get_clean();
-		setlocale(LC_NUMERIC, $locale);
-		return $out;
-	}
-
-	public function compileFile($fname, $outFname = null)
-	{
-		if (!is_readable($fname)) {
-			throw new Exception('load error: failed to find '.$fname);
-		}
-
-		$pi = pathinfo($fname);
-
-		$oldImport = $this->importDir;
-
-		$this->importDir = (array) $this->importDir;
-		$this->importDir[] = $pi['dirname'].'/';
-
-		$this->addParsedFile($fname);
-
-		$out = $this->compile(file_get_contents($fname), $fname);
-
-		$this->importDir = $oldImport;
-
-		if ($outFname !== null) {
-			return file_put_contents($outFname, $out);
-		}
-
-		return $out;
-	}
-
-	// compile only if changed input has changed or output doesn't exist
-	public function checkedCompile($in, $out)
-	{
-		if (!is_file($out) || filemtime($in) > filemtime($out)) {
-			$this->compileFile($in, $out);
-			return true;
-		}
-		return false;
-	}
-
-	/**
-	 * Execute lessphp on a .less file or a lessphp cache structure
-	 *
-	 * The lessphp cache structure contains information about a specific
-	 * less file having been parsed. It can be used as a hint for future
-	 * calls to determine whether or not a rebuild is required.
-	 *
-	 * The cache structure contains two important keys that may be used
-	 * externally:
-	 *
-	 * compiled: The final compiled CSS
-	 * updated: The time (in seconds) the CSS was last compiled
-	 *
-	 * The cache structure is a plain-ol' PHP associative array and can
-	 * be serialized and unserialized without a hitch.
-	 *
-	 * @param mixed $in Input
-	 * @param bool $force Force rebuild?
-	 * @return array|null lessphp cache structure
-	 */
-	public function cachedCompile($in, $force = false)
-	{
-		// assume no root
-		$root = null;
-
-		if (is_string($in)) {
-			$root = $in;
-		} elseif (is_array($in) && isset($in['root'])) {
-			if ($force || !isset($in['files'])) {
-				// If we are forcing a recompile or if for some reason the
-				// structure does not contain any file information we should
-				// specify the root to trigger a rebuild.
-				$root = $in['root'];
-			} elseif (isset($in['files']) && is_array($in['files'])) {
-				foreach ($in['files'] as $fname => $ftime) {
-					if (!file_exists($fname) || filemtime($fname) > $ftime) {
-						// One of the files we knew about previously has changed
-						// so we should look at our incoming root again.
-						$root = $in['root'];
-						break;
-					}
-				}
-			}
-		} else {
-			// TODO: Throw an exception? We got neither a string nor something
-			// that looks like a compatible lessphp cache structure.
-			return null;
-		}
-
-		if ($root !== null) {
-			// If we have a root value which means we should rebuild.
-			$out = array();
-			$out['root'] = $root;
-			$out['compiled'] = $this->compileFile($root);
-			$out['files'] = $this->allParsedFiles();
-			$out['updated'] = time();
-			return $out;
-		} else {
-			// No changes, pass back the structure
-			// we were given initially.
-			return $in;
-		}
-	}
-
-	// parse and compile buffer
-	// This is deprecated
-	public function parse($str = null, $initialVariables = null)
-	{
-		if (is_array($str)) {
-			$initialVariables = $str;
-			$str = null;
-		}
-
-		$oldVars = $this->registeredVars;
-		if ($initialVariables !== null) {
-			$this->setVariables($initialVariables);
-		}
-
-		if ($str == null) {
-			if (empty($this->_parseFile)) {
-				throw new exception("nothing to parse");
-			}
-
-			$out = $this->compileFile($this->_parseFile);
-		} else {
-			$out = $this->compile($str);
-		}
-
-		$this->registeredVars = $oldVars;
-		return $out;
-	}
-
-	protected function makeParser($name)
-	{
-		$parser = new lessc_parser($this, $name);
-		$parser->writeComments = $this->preserveComments;
-
-		return $parser;
-	}
-
-	public function setFormatter($name)
-	{
-		$this->formatterName = $name;
-	}
-
-	protected function newFormatter()
-	{
-		$className = "lessc_formatter_lessjs";
-		if (!empty($this->formatterName)) {
-			if (!is_string($this->formatterName)) {
-				return $this->formatterName;
-			}
-			$className = "lessc_formatter_$this->formatterName";
-		}
-
-		return new $className();
-	}
-
-	public function setPreserveComments($preserve)
-	{
-		$this->preserveComments = $preserve;
-	}
-
-	public function registerFunction($name, $func)
-	{
-		$this->libFunctions[$name] = $func;
-	}
-
-	public function unregisterFunction($name)
-	{
-		unset($this->libFunctions[$name]);
-	}
-
-	public function setVariables($variables)
-	{
-		$this->registeredVars = array_merge($this->registeredVars, $variables);
-	}
-
-	public function unsetVariable($name)
-	{
-		unset($this->registeredVars[$name]);
-	}
-
-	public function setImportDir($dirs)
-	{
-		$this->importDir = (array) $dirs;
-	}
-
-	public function addImportDir($dir)
-	{
-		$this->importDir = (array) $this->importDir;
-		$this->importDir[] = $dir;
-	}
-
-	public function allParsedFiles()
-	{
-		return $this->allParsedFiles;
-	}
-
-	public function addParsedFile($file)
-	{
-		$this->allParsedFiles[realpath($file)] = filemtime($file);
-	}
-
-	/**
-	 * Uses the current value of $this->count to show line and line number
-	 */
-	public function throwError($msg = null)
-	{
-		if ($this->sourceLoc >= 0) {
-			$this->sourceParser->throwError($msg, $this->sourceLoc);
-		}
-		throw new exception($msg);
-	}
-
-	// compile file $in to file $out if $in is newer than $out
-	// returns true when it compiles, false otherwise
-	public static function ccompile($in, $out, $less = null)
-	{
-		if ($less === null) {
-			$less = new self();
-		}
-		return $less->checkedCompile($in, $out);
-	}
-
-	public static function cexecute($in, $force = false, $less = null)
-	{
-		if ($less === null) {
-			$less = new self();
-		}
-		return $less->cachedCompile($in, $force);
-	}
-
-	protected static $cssColors = array(
-		'aliceblue' => '240,248,255',
-		'antiquewhite' => '250,235,215',
-		'aqua' => '0,255,255',
-		'aquamarine' => '127,255,212',
-		'azure' => '240,255,255',
-		'beige' => '245,245,220',
-		'bisque' => '255,228,196',
-		'black' => '0,0,0',
-		'blanchedalmond' => '255,235,205',
-		'blue' => '0,0,255',
-		'blueviolet' => '138,43,226',
-		'brown' => '165,42,42',
-		'burlywood' => '222,184,135',
-		'cadetblue' => '95,158,160',
-		'chartreuse' => '127,255,0',
-		'chocolate' => '210,105,30',
-		'coral' => '255,127,80',
-		'cornflowerblue' => '100,149,237',
-		'cornsilk' => '255,248,220',
-		'crimson' => '220,20,60',
-		'cyan' => '0,255,255',
-		'darkblue' => '0,0,139',
-		'darkcyan' => '0,139,139',
-		'darkgoldenrod' => '184,134,11',
-		'darkgray' => '169,169,169',
-		'darkgreen' => '0,100,0',
-		'darkgrey' => '169,169,169',
-		'darkkhaki' => '189,183,107',
-		'darkmagenta' => '139,0,139',
-		'darkolivegreen' => '85,107,47',
-		'darkorange' => '255,140,0',
-		'darkorchid' => '153,50,204',
-		'darkred' => '139,0,0',
-		'darksalmon' => '233,150,122',
-		'darkseagreen' => '143,188,143',
-		'darkslateblue' => '72,61,139',
-		'darkslategray' => '47,79,79',
-		'darkslategrey' => '47,79,79',
-		'darkturquoise' => '0,206,209',
-		'darkviolet' => '148,0,211',
-		'deeppink' => '255,20,147',
-		'deepskyblue' => '0,191,255',
-		'dimgray' => '105,105,105',
-		'dimgrey' => '105,105,105',
-		'dodgerblue' => '30,144,255',
-		'firebrick' => '178,34,34',
-		'floralwhite' => '255,250,240',
-		'forestgreen' => '34,139,34',
-		'fuchsia' => '255,0,255',
-		'gainsboro' => '220,220,220',
-		'ghostwhite' => '248,248,255',
-		'gold' => '255,215,0',
-		'goldenrod' => '218,165,32',
-		'gray' => '128,128,128',
-		'green' => '0,128,0',
-		'greenyellow' => '173,255,47',
-		'grey' => '128,128,128',
-		'honeydew' => '240,255,240',
-		'hotpink' => '255,105,180',
-		'indianred' => '205,92,92',
-		'indigo' => '75,0,130',
-		'ivory' => '255,255,240',
-		'khaki' => '240,230,140',
-		'lavender' => '230,230,250',
-		'lavenderblush' => '255,240,245',
-		'lawngreen' => '124,252,0',
-		'lemonchiffon' => '255,250,205',
-		'lightblue' => '173,216,230',
-		'lightcoral' => '240,128,128',
-		'lightcyan' => '224,255,255',
-		'lightgoldenrodyellow' => '250,250,210',
-		'lightgray' => '211,211,211',
-		'lightgreen' => '144,238,144',
-		'lightgrey' => '211,211,211',
-		'lightpink' => '255,182,193',
-		'lightsalmon' => '255,160,122',
-		'lightseagreen' => '32,178,170',
-		'lightskyblue' => '135,206,250',
-		'lightslategray' => '119,136,153',
-		'lightslategrey' => '119,136,153',
-		'lightsteelblue' => '176,196,222',
-		'lightyellow' => '255,255,224',
-		'lime' => '0,255,0',
-		'limegreen' => '50,205,50',
-		'linen' => '250,240,230',
-		'magenta' => '255,0,255',
-		'maroon' => '128,0,0',
-		'mediumaquamarine' => '102,205,170',
-		'mediumblue' => '0,0,205',
-		'mediumorchid' => '186,85,211',
-		'mediumpurple' => '147,112,219',
-		'mediumseagreen' => '60,179,113',
-		'mediumslateblue' => '123,104,238',
-		'mediumspringgreen' => '0,250,154',
-		'mediumturquoise' => '72,209,204',
-		'mediumvioletred' => '199,21,133',
-		'midnightblue' => '25,25,112',
-		'mintcream' => '245,255,250',
-		'mistyrose' => '255,228,225',
-		'moccasin' => '255,228,181',
-		'navajowhite' => '255,222,173',
-		'navy' => '0,0,128',
-		'oldlace' => '253,245,230',
-		'olive' => '128,128,0',
-		'olivedrab' => '107,142,35',
-		'orange' => '255,165,0',
-		'orangered' => '255,69,0',
-		'orchid' => '218,112,214',
-		'palegoldenrod' => '238,232,170',
-		'palegreen' => '152,251,152',
-		'paleturquoise' => '175,238,238',
-		'palevioletred' => '219,112,147',
-		'papayawhip' => '255,239,213',
-		'peachpuff' => '255,218,185',
-		'peru' => '205,133,63',
-		'pink' => '255,192,203',
-		'plum' => '221,160,221',
-		'powderblue' => '176,224,230',
-		'purple' => '128,0,128',
-		'red' => '255,0,0',
-		'rosybrown' => '188,143,143',
-		'royalblue' => '65,105,225',
-		'saddlebrown' => '139,69,19',
-		'salmon' => '250,128,114',
-		'sandybrown' => '244,164,96',
-		'seagreen' => '46,139,87',
-		'seashell' => '255,245,238',
-		'sienna' => '160,82,45',
-		'silver' => '192,192,192',
-		'skyblue' => '135,206,235',
-		'slateblue' => '106,90,205',
-		'slategray' => '112,128,144',
-		'slategrey' => '112,128,144',
-		'snow' => '255,250,250',
-		'springgreen' => '0,255,127',
-		'steelblue' => '70,130,180',
-		'tan' => '210,180,140',
-		'teal' => '0,128,128',
-		'thistle' => '216,191,216',
-		'tomato' => '255,99,71',
-		'transparent' => '0,0,0,0',
-		'turquoise' => '64,224,208',
-		'violet' => '238,130,238',
-		'wheat' => '245,222,179',
-		'white' => '255,255,255',
-		'whitesmoke' => '245,245,245',
-		'yellow' => '255,255,0',
-		'yellowgreen' => '154,205,50'
-	);
+    public static $VERSION = "v0.8.0";
+
+    public static $TRUE = array("keyword", "true");
+    public static $FALSE = array("keyword", "false");
+
+    protected $libFunctions = array();
+    protected $registeredVars = array();
+    protected $preserveComments = false;
+
+    public $vPrefix = '@'; // prefix of abstract properties
+    public $mPrefix = '$'; // prefix of abstract blocks
+    public $parentSelector = '&';
+
+    public $importDisabled = false;
+    public $importDir = '';
+
+    public $scope;
+    public $formatter;
+    public $formatterName;
+    public $parser;
+    public $_parseFile;
+    public $env;
+    public $count;
+
+    protected $numberPrecision = null;
+
+    protected $allParsedFiles = array();
+
+    // set to the parser that generated the current line when compiling
+    // so we know how to create error messages
+    protected $sourceParser = null;
+    protected $sourceLoc = null;
+
+    protected static $nextImportId = 0; // uniquely identify imports
+
+    // attempts to find the path of an import url, returns null for css files
+    protected function findImport($url)
+    {
+        foreach ((array) $this->importDir as $dir) {
+            $full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url;
+            if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) {
+                return $file;
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * fileExists
+     *
+     * @param       string  $name   Filename
+     * @return      boolean
+     */
+    protected function fileExists($name)
+    {
+        return is_file($name);
+    }
+
+    public static function compressList($items, $delim)
+    {
+        if (!isset($items[1]) && isset($items[0])) {
+            return $items[0];
+        } else {
+            return array('list', $delim, $items);
+        }
+    }
+
+    public static function preg_quote($what)
+    {
+        return preg_quote($what, '/');
+    }
+
+    protected function tryImport($importPath, $parentBlock, $out)
+    {
+        if ($importPath[0] == "function" && $importPath[1] == "url") {
+            $importPath = $this->flattenList($importPath[2]);
+        }
+
+        $str = $this->coerceString($importPath);
+        if ($str === null) {
+            return false;
+        }
+
+        $url = $this->compileValue($this->lib_e($str));
+
+        // don't import if it ends in css
+        if (substr_compare($url, '.css', -4, 4) === 0) {
+            return false;
+        }
+
+        $realPath = $this->findImport($url);
+
+        if ($realPath === null) {
+            return false;
+        }
+
+        if ($this->importDisabled) {
+            return array(false, "/* import disabled */");
+        }
+
+        if (isset($this->allParsedFiles[realpath($realPath)])) {
+            return array(false, null);
+        }
+
+        $this->addParsedFile($realPath);
+        $parser = $this->makeParser($realPath);
+        $root = $parser->parse(file_get_contents($realPath));
+
+        // set the parents of all the block props
+        foreach ($root->props as $prop) {
+            if ($prop[0] == "block") {
+                $prop[1]->parent = $parentBlock;
+            }
+        }
+
+        // copy mixins into scope, set their parents
+        // bring blocks from import into current block
+        // TODO: need to mark the source parser these came from this file
+        foreach ($root->children as $childName => $child) {
+            if (isset($parentBlock->children[$childName])) {
+                $parentBlock->children[$childName] = array_merge(
+                    $parentBlock->children[$childName],
+                    $child
+                );
+            } else {
+                $parentBlock->children[$childName] = $child;
+            }
+        }
+
+        $pi = pathinfo($realPath);
+        $dir = $pi["dirname"];
+
+        list($top, $bottom) = $this->sortProps($root->props, true);
+        $this->compileImportedProps($top, $parentBlock, $out, $parser, $dir);
+
+        return array(true, $bottom, $parser, $dir);
+    }
+
+    protected function compileImportedProps($props, $block, $out, $sourceParser, $importDir)
+    {
+        $oldSourceParser = $this->sourceParser;
+
+        $oldImport = $this->importDir;
+
+        // TODO: this is because the importDir api is stupid
+        $this->importDir = (array) $this->importDir;
+        array_unshift($this->importDir, $importDir);
+
+        foreach ($props as $prop) {
+            $this->compileProp($prop, $block, $out);
+        }
+
+        $this->importDir = $oldImport;
+        $this->sourceParser = $oldSourceParser;
+    }
+
+    /**
+     * Recursively compiles a block.
+     *
+     * A block is analogous to a CSS block in most cases. A single LESS document
+     * is encapsulated in a block when parsed, but it does not have parent tags
+     * so all of it's children appear on the root level when compiled.
+     *
+     * Blocks are made up of props and children.
+     *
+     * Props are property instructions, array tuples which describe an action
+     * to be taken, eg. write a property, set a variable, mixin a block.
+     *
+     * The children of a block are just all the blocks that are defined within.
+     * This is used to look up mixins when performing a mixin.
+     *
+     * Compiling the block involves pushing a fresh environment on the stack,
+     * and iterating through the props, compiling each one.
+     *
+     * See Lessc::compileProp()
+     *
+     */
+    protected function compileBlock($block)
+    {
+        switch ($block->type) {
+            case "root":
+                $this->compileRoot($block);
+                break;
+            case null:
+                $this->compileCSSBlock($block);
+                break;
+            case "media":
+                $this->compileMedia($block);
+                break;
+            case "directive":
+                $name = "@".$block->name;
+                if (!empty($block->value)) {
+                    $name .= " ".$this->compileValue($this->reduce($block->value));
+                }
+
+                $this->compileNestedBlock($block, array($name));
+                break;
+            default:
+                $this->throwError("unknown block type: $block->type\n");
+        }
+    }
+
+    protected function compileCSSBlock($block)
+    {
+        $env = $this->pushEnv();
+
+        $selectors = $this->compileSelectors($block->tags);
+        $env->selectors = $this->multiplySelectors($selectors);
+        $out = $this->makeOutputBlock(null, $env->selectors);
+
+        $this->scope->children[] = $out;
+        $this->compileProps($block, $out);
+
+        $block->scope = $env; // mixins carry scope with them!
+        $this->popEnv();
+    }
+
+    protected function compileMedia($media)
+    {
+        $env = $this->pushEnv($media);
+        $parentScope = $this->mediaParent($this->scope);
+
+        $query = $this->compileMediaQuery($this->multiplyMedia($env));
+
+        $this->scope = $this->makeOutputBlock($media->type, array($query));
+        $parentScope->children[] = $this->scope;
+
+        $this->compileProps($media, $this->scope);
+
+        if (count($this->scope->lines) > 0) {
+            $orphanSelelectors = $this->findClosestSelectors();
+            if (!is_null($orphanSelelectors)) {
+                $orphan = $this->makeOutputBlock(null, $orphanSelelectors);
+                $orphan->lines = $this->scope->lines;
+                array_unshift($this->scope->children, $orphan);
+                $this->scope->lines = array();
+            }
+        }
+
+        $this->scope = $this->scope->parent;
+        $this->popEnv();
+    }
+
+    protected function mediaParent($scope)
+    {
+        while (!empty($scope->parent)) {
+            if (!empty($scope->type) && $scope->type != "media") {
+                break;
+            }
+            $scope = $scope->parent;
+        }
+
+        return $scope;
+    }
+
+    protected function compileNestedBlock($block, $selectors)
+    {
+        $this->pushEnv($block);
+        $this->scope = $this->makeOutputBlock($block->type, $selectors);
+        $this->scope->parent->children[] = $this->scope;
+
+        $this->compileProps($block, $this->scope);
+
+        $this->scope = $this->scope->parent;
+        $this->popEnv();
+    }
+
+    protected function compileRoot($root)
+    {
+        $this->pushEnv();
+        $this->scope = $this->makeOutputBlock($root->type);
+        $this->compileProps($root, $this->scope);
+        $this->popEnv();
+    }
+
+    protected function compileProps($block, $out)
+    {
+        foreach ($this->sortProps($block->props) as $prop) {
+            $this->compileProp($prop, $block, $out);
+        }
+        $out->lines = $this->deduplicate($out->lines);
+    }
+
+    /**
+     * Deduplicate lines in a block. Comments are not deduplicated. If a
+     * duplicate rule is detected, the comments immediately preceding each
+     * occurence are consolidated.
+     */
+    protected function deduplicate($lines)
+    {
+        $unique = array();
+        $comments = array();
+
+        foreach ($lines as $line) {
+            if (strpos($line, '/*') === 0) {
+                $comments[] = $line;
+                continue;
+            }
+            if (!in_array($line, $unique)) {
+                $unique[] = $line;
+            }
+            array_splice($unique, array_search($line, $unique), 0, $comments);
+            $comments = array();
+        }
+        return array_merge($unique, $comments);
+    }
+
+    protected function sortProps($props, $split = false)
+    {
+        $vars = array();
+        $imports = array();
+        $other = array();
+        $stack = array();
+
+        foreach ($props as $prop) {
+            switch ($prop[0]) {
+                case "comment":
+                    $stack[] = $prop;
+                    break;
+                case "assign":
+                    $stack[] = $prop;
+                    if (isset($prop[1][0]) && $prop[1][0] == $this->vPrefix) {
+                        $vars = array_merge($vars, $stack);
+                    } else {
+                        $other = array_merge($other, $stack);
+                    }
+                    $stack = array();
+                    break;
+                case "import":
+                    $id = self::$nextImportId++;
+                    $prop[] = $id;
+                    $stack[] = $prop;
+                    $imports = array_merge($imports, $stack);
+                    $other[] = array("import_mixin", $id);
+                    $stack = array();
+                    break;
+                default:
+                    $stack[] = $prop;
+                    $other = array_merge($other, $stack);
+                    $stack = array();
+                    break;
+            }
+        }
+        $other = array_merge($other, $stack);
+
+        if ($split) {
+            return array(array_merge($imports, $vars), $other);
+        } else {
+            return array_merge($imports, $vars, $other);
+        }
+    }
+
+    protected function compileMediaQuery($queries)
+    {
+        $compiledQueries = array();
+        foreach ($queries as $query) {
+            $parts = array();
+            foreach ($query as $q) {
+                switch ($q[0]) {
+                    case "mediaType":
+                        $parts[] = implode(" ", array_slice($q, 1));
+                        break;
+                    case "mediaExp":
+                        if (isset($q[2])) {
+                            $parts[] = "($q[1]: ".
+                                $this->compileValue($this->reduce($q[2])).")";
+                        } else {
+                            $parts[] = "($q[1])";
+                        }
+                        break;
+                    case "variable":
+                        $parts[] = $this->compileValue($this->reduce($q));
+                        break;
+                }
+            }
+
+            if (count($parts) > 0) {
+                $compiledQueries[] = implode(" and ", $parts);
+            }
+        }
+
+        $out = "@media";
+        if (!empty($parts)) {
+            $out .= " ".
+                implode($this->formatter->selectorSeparator, $compiledQueries);
+        }
+        return $out;
+    }
+
+    protected function multiplyMedia($env, $childQueries = null)
+    {
+        if (is_null($env) ||
+            !empty($env->block->type) && $env->block->type != "media"
+        ) {
+            return $childQueries;
+        }
+
+        // plain old block, skip
+        if (empty($env->block->type)) {
+            return $this->multiplyMedia($env->parent, $childQueries);
+        }
+
+        $out = array();
+        $queries = $env->block->queries;
+        if (is_null($childQueries)) {
+            $out = $queries;
+        } else {
+            foreach ($queries as $parent) {
+                foreach ($childQueries as $child) {
+                    $out[] = array_merge($parent, $child);
+                }
+            }
+        }
+
+        return $this->multiplyMedia($env->parent, $out);
+    }
+
+    protected function expandParentSelectors(&$tag, $replace)
+    {
+        $parts = explode("$&$", $tag);
+        $count = 0;
+        foreach ($parts as &$part) {
+            $c = 0;
+            $part = str_replace($this->parentSelector, $replace, $part, $c);
+            $count += $c;
+        }
+        $tag = implode($this->parentSelector, $parts);
+        return $count;
+    }
+
+    protected function findClosestSelectors()
+    {
+        $env = $this->env;
+        $selectors = null;
+        while ($env !== null) {
+            if (isset($env->selectors)) {
+                $selectors = $env->selectors;
+                break;
+            }
+            $env = $env->parent;
+        }
+
+        return $selectors;
+    }
+
+
+    // multiply $selectors against the nearest selectors in env
+    protected function multiplySelectors($selectors)
+    {
+        // find parent selectors
+
+        $parentSelectors = $this->findClosestSelectors();
+        if (is_null($parentSelectors)) {
+            // kill parent reference in top level selector
+            foreach ($selectors as &$s) {
+                $this->expandParentSelectors($s, "");
+            }
+
+            return $selectors;
+        }
+
+        $out = array();
+        foreach ($parentSelectors as $parent) {
+            foreach ($selectors as $child) {
+                $count = $this->expandParentSelectors($child, $parent);
+
+                // don't prepend the parent tag if & was used
+                if ($count > 0) {
+                    $out[] = trim($child);
+                } else {
+                    $out[] = trim($parent.' '.$child);
+                }
+            }
+        }
+
+        return $out;
+    }
+
+    // reduces selector expressions
+    protected function compileSelectors($selectors)
+    {
+        $out = array();
+
+        foreach ($selectors as $s) {
+            if (is_array($s)) {
+                list(, $value) = $s;
+                $out[] = trim($this->compileValue($this->reduce($value)));
+            } else {
+                $out[] = $s;
+            }
+        }
+
+        return $out;
+    }
+
+    protected function eq($left, $right)
+    {
+        return $left == $right;
+    }
+
+    protected function patternMatch($block, $orderedArgs, $keywordArgs)
+    {
+        // match the guards if it has them
+        // any one of the groups must have all its guards pass for a match
+        if (!empty($block->guards)) {
+            $groupPassed = false;
+            foreach ($block->guards as $guardGroup) {
+                foreach ($guardGroup as $guard) {
+                    $this->pushEnv();
+                    $this->zipSetArgs($block->args, $orderedArgs, $keywordArgs);
+
+                    $negate = false;
+                    if ($guard[0] == "negate") {
+                        $guard = $guard[1];
+                        $negate = true;
+                    }
+
+                    $passed = $this->reduce($guard) == self::$TRUE;
+                    if ($negate) {
+                        $passed = !$passed;
+                    }
+
+                    $this->popEnv();
+
+                    if ($passed) {
+                        $groupPassed = true;
+                    } else {
+                        $groupPassed = false;
+                        break;
+                    }
+                }
+
+                if ($groupPassed) {
+                    break;
+                }
+            }
+
+            if (!$groupPassed) {
+                return false;
+            }
+        }
+
+        if (empty($block->args)) {
+            return $block->isVararg || empty($orderedArgs) && empty($keywordArgs);
+        }
+
+        $remainingArgs = $block->args;
+        if ($keywordArgs) {
+            $remainingArgs = array();
+            foreach ($block->args as $arg) {
+                if ($arg[0] == "arg" && isset($keywordArgs[$arg[1]])) {
+                    continue;
+                }
+
+                $remainingArgs[] = $arg;
+            }
+        }
+
+        $i = -1; // no args
+        // try to match by arity or by argument literal
+        foreach ($remainingArgs as $i => $arg) {
+            switch ($arg[0]) {
+                case "lit":
+                    if (empty($orderedArgs[$i]) || !$this->eq($arg[1], $orderedArgs[$i])) {
+                        return false;
+                    }
+                    break;
+                case "arg":
+                    // no arg and no default value
+                    if (!isset($orderedArgs[$i]) && !isset($arg[2])) {
+                        return false;
+                    }
+                    break;
+                case "rest":
+                    $i--; // rest can be empty
+                    break 2;
+            }
+        }
+
+        if ($block->isVararg) {
+            return true; // not having enough is handled above
+        } else {
+            $numMatched = $i + 1;
+            // greater than because default values always match
+            return $numMatched >= count($orderedArgs);
+        }
+    }
+
+    protected function patternMatchAll($blocks, $orderedArgs, $keywordArgs, $skip = array())
+    {
+        $matches = null;
+        foreach ($blocks as $block) {
+            // skip seen blocks that don't have arguments
+            if (isset($skip[$block->id]) && !isset($block->args)) {
+                continue;
+            }
+
+            if ($this->patternMatch($block, $orderedArgs, $keywordArgs)) {
+                $matches[] = $block;
+            }
+        }
+
+        return $matches;
+    }
+
+    // attempt to find blocks matched by path and args
+    protected function findBlocks($searchIn, $path, $orderedArgs, $keywordArgs, $seen = array())
+    {
+        if ($searchIn == null) {
+            return null;
+        }
+        if (isset($seen[$searchIn->id])) {
+            return null;
+        }
+        $seen[$searchIn->id] = true;
+
+        $name = $path[0];
+
+        if (isset($searchIn->children[$name])) {
+            $blocks = $searchIn->children[$name];
+            if (count($path) == 1) {
+                $matches = $this->patternMatchAll($blocks, $orderedArgs, $keywordArgs, $seen);
+                if (!empty($matches)) {
+                    // This will return all blocks that match in the closest
+                    // scope that has any matching block, like lessjs
+                    return $matches;
+                }
+            } else {
+                $matches = array();
+                foreach ($blocks as $subBlock) {
+                    $subMatches = $this->findBlocks(
+                        $subBlock,
+                        array_slice($path, 1),
+                        $orderedArgs,
+                        $keywordArgs,
+                        $seen
+                    );
+
+                    if (!is_null($subMatches)) {
+                        foreach ($subMatches as $sm) {
+                            $matches[] = $sm;
+                        }
+                    }
+                }
+
+                return count($matches) > 0 ? $matches : null;
+            }
+        }
+        if ($searchIn->parent === $searchIn) {
+            return null;
+        }
+        return $this->findBlocks($searchIn->parent, $path, $orderedArgs, $keywordArgs, $seen);
+    }
+
+    // sets all argument names in $args to either the default value
+    // or the one passed in through $values
+    protected function zipSetArgs($args, $orderedValues, $keywordValues)
+    {
+        $assignedValues = array();
+
+        $i = 0;
+        foreach ($args as $a) {
+            if ($a[0] == "arg") {
+                if (isset($keywordValues[$a[1]])) {
+                    // has keyword arg
+                    $value = $keywordValues[$a[1]];
+                } elseif (isset($orderedValues[$i])) {
+                    // has ordered arg
+                    $value = $orderedValues[$i];
+                    $i++;
+                } elseif (isset($a[2])) {
+                    // has default value
+                    $value = $a[2];
+                } else {
+                    $value = null; // :(
+                    $this->throwError("Failed to assign arg ".$a[1]); // This ends function by throwing an exception
+                }
+
+                $value = $this->reduce($value);
+                $this->set($a[1], $value);
+                $assignedValues[] = $value;
+            } else {
+                // a lit
+                $i++;
+            }
+        }
+
+        // check for a rest
+        $last = end($args);
+        if ($last && $last[0] == "rest") {
+            $rest = array_slice($orderedValues, count($args) - 1);
+            $this->set($last[1], $this->reduce(array("list", " ", $rest)));
+        }
+
+        // wow is this the only true use of PHP's + operator for arrays?
+        $this->env->arguments = $assignedValues + $orderedValues;
+    }
+
+    // compile a prop and update $lines or $blocks appropriately
+    protected function compileProp($prop, $block, $out)
+    {
+        // set error position context
+        $this->sourceLoc = isset($prop[-1]) ? $prop[-1] : -1;
+
+        switch ($prop[0]) {
+            case 'assign':
+                list(, $name, $value) = $prop;
+                if ($name[0] == $this->vPrefix) {
+                    $this->set($name, $value);
+                } else {
+                    $out->lines[] = $this->formatter->property(
+                        $name,
+                        $this->compileValue($this->reduce($value))
+                    );
+                }
+                break;
+            case 'block':
+                list(, $child) = $prop;
+                $this->compileBlock($child);
+                break;
+            case 'mixin':
+                list(, $path, $args, $suffix) = $prop;
+
+                $orderedArgs = array();
+                $keywordArgs = array();
+                foreach ((array) $args as $arg) {
+                    $argval = null;
+                    switch ($arg[0]) {
+                        case "arg":
+                            if (!isset($arg[2])) {
+                                $orderedArgs[] = $this->reduce(array("variable", $arg[1]));
+                            } else {
+                                $keywordArgs[$arg[1]] = $this->reduce($arg[2]);
+                            }
+                            break;
+
+                        case "lit":
+                            $orderedArgs[] = $this->reduce($arg[1]);
+                            break;
+                        default:
+                            $this->throwError("Unknown arg type: ".$arg[0]);
+                    }
+                }
+
+                $mixins = $this->findBlocks($block, $path, $orderedArgs, $keywordArgs);
+
+                if ($mixins === null) {
+                    $this->throwError("{$prop[1][0]} is undefined");
+                }
+
+                foreach ($mixins as $mixin) {
+                    if ($mixin === $block && !$orderedArgs) {
+                        continue;
+                    }
+
+                    $haveScope = false;
+                    if (isset($mixin->parent->scope)) {
+                        $haveScope = true;
+                        $mixinParentEnv = $this->pushEnv();
+                        $mixinParentEnv->storeParent = $mixin->parent->scope;
+                    }
+
+                    $haveArgs = false;
+                    if (isset($mixin->args)) {
+                        $haveArgs = true;
+                        $this->pushEnv();
+                        $this->zipSetArgs($mixin->args, $orderedArgs, $keywordArgs);
+                    }
+
+                    $oldParent = $mixin->parent;
+                    if ($mixin != $block) {
+                        $mixin->parent = $block;
+                    }
+
+                    foreach ($this->sortProps($mixin->props) as $subProp) {
+                        if ($suffix !== null &&
+                            $subProp[0] == "assign" &&
+                            is_string($subProp[1]) &&
+                            $subProp[1][0] != $this->vPrefix
+                        ) {
+                            $subProp[2] = array(
+                                'list', ' ',
+                                array($subProp[2], array('keyword', $suffix))
+                            );
+                        }
+
+                        $this->compileProp($subProp, $mixin, $out);
+                    }
+
+                    $mixin->parent = $oldParent;
+
+                    if ($haveArgs) {
+                        $this->popEnv();
+                    }
+                    if ($haveScope) {
+                        $this->popEnv();
+                    }
+                }
+
+                break;
+            case 'raw':
+                $out->lines[] = $prop[1];
+                break;
+            case "directive":
+                list(, $name, $value) = $prop;
+                $out->lines[] = "@$name ".$this->compileValue($this->reduce($value)).';';
+                break;
+            case "comment":
+                $out->lines[] = $prop[1];
+                break;
+            case "import":
+                list(, $importPath, $importId) = $prop;
+                $importPath = $this->reduce($importPath);
+
+                if (!isset($this->env->imports)) {
+                    $this->env->imports = array();
+                }
+
+                $result = $this->tryImport($importPath, $block, $out);
+
+                $this->env->imports[$importId] = $result === false ?
+                    array(false, "@import ".$this->compileValue($importPath).";") : $result;
+
+                break;
+            case "import_mixin":
+                list(, $importId) = $prop;
+                $import = $this->env->imports[$importId];
+                if ($import[0] === false) {
+                    if (isset($import[1])) {
+                        $out->lines[] = $import[1];
+                    }
+                } else {
+                    list(, $bottom, $parser, $importDir) = $import;
+                    $this->compileImportedProps($bottom, $block, $out, $parser, $importDir);
+                }
+
+                break;
+            default:
+                $this->throwError("unknown op: {$prop[0]}\n");
+        }
+    }
+
+
+    /**
+     * Compiles a primitive value into a CSS property value.
+     *
+     * Values in lessphp are typed by being wrapped in arrays, their format is
+     * typically:
+     *
+     *     array(type, contents [, additional_contents]*)
+     *
+     * The input is expected to be reduced. This function will not work on
+     * things like expressions and variables.
+     */
+    public function compileValue($value)
+    {
+        switch ($value[0]) {
+            case 'list':
+                // [1] - delimiter
+                // [2] - array of values
+                return implode($value[1], array_map(array($this, 'compileValue'), $value[2]));
+            case 'raw_color':
+                if (!empty($this->formatter->compressColors)) {
+                    return $this->compileValue($this->coerceColor($value));
+                }
+                return $value[1];
+            case 'keyword':
+                // [1] - the keyword
+                return $value[1];
+            case 'number':
+                list(, $num, $unit) = $value;
+                // [1] - the number
+                // [2] - the unit
+                if ($this->numberPrecision !== null) {
+                    $num = round($num, $this->numberPrecision);
+                }
+                return $num.$unit;
+            case 'string':
+                // [1] - contents of string (includes quotes)
+                list(, $delim, $content) = $value;
+                foreach ($content as &$part) {
+                    if (is_array($part)) {
+                        $part = $this->compileValue($part);
+                    }
+                }
+                return $delim.implode($content).$delim;
+            case 'color':
+                // [1] - red component (either number or a %)
+                // [2] - green component
+                // [3] - blue component
+                // [4] - optional alpha component
+                list(, $r, $g, $b) = $value;
+                $r = round($r);
+                $g = round($g);
+                $b = round($b);
+
+                if (count($value) == 5 && $value[4] != 1) { // rgba
+                    return 'rgba('.$r.','.$g.','.$b.','.$value[4].')';
+                }
+
+                $h = sprintf("#%02x%02x%02x", $r, $g, $b);
+
+                if (!empty($this->formatter->compressColors)) {
+                    // Converting hex color to short notation (e.g. #003399 to #039)
+                    if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) {
+                        $h = '#'.$h[1].$h[3].$h[5];
+                    }
+                }
+
+                return $h;
+
+            case 'function':
+                list(, $name, $args) = $value;
+                return $name.'('.$this->compileValue($args).')';
+            default: // assumed to be unit
+                $this->throwError("unknown value type: $value[0]");
+        }
+    }
+
+    protected function lib_pow($args)
+    {
+        list($base, $exp) = $this->assertArgs($args, 2, "pow");
+        return pow($this->assertNumber($base), $this->assertNumber($exp));
+    }
+
+    protected function lib_pi()
+    {
+        return pi();
+    }
+
+    protected function lib_mod($args)
+    {
+        list($a, $b) = $this->assertArgs($args, 2, "mod");
+        return $this->assertNumber($a) % $this->assertNumber($b);
+    }
+
+    protected function lib_tan($num)
+    {
+        return tan($this->assertNumber($num));
+    }
+
+    protected function lib_sin($num)
+    {
+        return sin($this->assertNumber($num));
+    }
+
+    protected function lib_cos($num)
+    {
+        return cos($this->assertNumber($num));
+    }
+
+    protected function lib_atan($num)
+    {
+        $num = atan($this->assertNumber($num));
+        return array("number", $num, "rad");
+    }
+
+    protected function lib_asin($num)
+    {
+        $num = asin($this->assertNumber($num));
+        return array("number", $num, "rad");
+    }
+
+    protected function lib_acos($num)
+    {
+        $num = acos($this->assertNumber($num));
+        return array("number", $num, "rad");
+    }
+
+    protected function lib_sqrt($num)
+    {
+        return sqrt($this->assertNumber($num));
+    }
+
+    protected function lib_extract($value)
+    {
+        list($list, $idx) = $this->assertArgs($value, 2, "extract");
+        $idx = $this->assertNumber($idx);
+        // 1 indexed
+        if ($list[0] == "list" && isset($list[2][$idx - 1])) {
+            return $list[2][$idx - 1];
+        }
+        return '';
+    }
+
+    protected function lib_isnumber($value)
+    {
+        return $this->toBool($value[0] == "number");
+    }
+
+    protected function lib_isstring($value)
+    {
+        return $this->toBool($value[0] == "string");
+    }
+
+    protected function lib_iscolor($value)
+    {
+        return $this->toBool($this->coerceColor($value));
+    }
+
+    protected function lib_iskeyword($value)
+    {
+        return $this->toBool($value[0] == "keyword");
+    }
+
+    protected function lib_ispixel($value)
+    {
+        return $this->toBool($value[0] == "number" && $value[2] == "px");
+    }
+
+    protected function lib_ispercentage($value)
+    {
+        return $this->toBool($value[0] == "number" && $value[2] == "%");
+    }
+
+    protected function lib_isem($value)
+    {
+        return $this->toBool($value[0] == "number" && $value[2] == "em");
+    }
+
+    protected function lib_isrem($value)
+    {
+        return $this->toBool($value[0] == "number" && $value[2] == "rem");
+    }
+
+    protected function lib_rgbahex($color)
+    {
+        $color = $this->coerceColor($color);
+        if (is_null($color)) {
+            $this->throwError("color expected for rgbahex");
+        }
+
+        return sprintf(
+            "#%02x%02x%02x%02x",
+            isset($color[4]) ? $color[4] * 255 : 255,
+            $color[1],
+            $color[2],
+            $color[3]
+        );
+    }
+
+    protected function lib_argb($color)
+    {
+        return $this->lib_rgbahex($color);
+    }
+
+    /**
+     * Given an url, decide whether to output a regular link or the base64-encoded contents of the file
+     *
+     * @param  array  $value either an argument list (two strings) or a single string
+     * @return string        formatted url(), either as a link or base64-encoded
+     */
+    protected function lib_data_uri($value)
+    {
+        $mime = ($value[0] === 'list') ? $value[2][0][2] : null;
+        $url = ($value[0] === 'list') ? $value[2][1][2][0] : $value[2][0];
+
+        $fullpath = $this->findImport($url);
+
+        if ($fullpath && ($fsize = filesize($fullpath)) !== false) {
+            // IE8 can't handle data uris larger than 32KB
+            if ($fsize / 1024 < 32) {
+                if (is_null($mime)) {
+                    if (class_exists('finfo')) { // php 5.3+
+                        $finfo = new finfo(FILEINFO_MIME);
+                        $mime = explode('; ', $finfo->file($fullpath));
+                        $mime = $mime[0];
+                    } elseif (function_exists('mime_content_type')) { // PHP 5.2
+                        $mime = mime_content_type($fullpath);
+                    }
+                }
+
+                if (!is_null($mime)) { // fallback if the mime type is still unknown
+                    $url = sprintf('data:%s;base64,%s', $mime, base64_encode(file_get_contents($fullpath)));
+                }
+            }
+        }
+
+        return 'url("'.$url.'")';
+    }
+
+    // utility func to unquote a string
+    protected function lib_e($arg)
+    {
+        switch ($arg[0]) {
+            case "list":
+                $items = $arg[2];
+                if (isset($items[0])) {
+                    return $this->lib_e($items[0]);
+                }
+                $this->throwError("unrecognised input"); // This ends function by throwing an exception
+                // no break
+            case "string":
+                $arg[1] = "";
+                return $arg;
+            case "keyword":
+                return $arg;
+            default:
+                return array("keyword", $this->compileValue($arg));
+        }
+    }
+
+    protected function lib__sprintf($args)
+    {
+        if ($args[0] != "list") {
+            return $args;
+        }
+        $values = $args[2];
+        $string = array_shift($values);
+        $template = $this->compileValue($this->lib_e($string));
+
+        $i = 0;
+        $m = array();
+        if (preg_match_all('/%[dsa]/', $template, $m)) {
+            foreach ($m[0] as $match) {
+                $val = isset($values[$i]) ?
+                    $this->reduce($values[$i]) : array('keyword', '');
+
+                // lessjs compat, renders fully expanded color, not raw color
+                if ($color = $this->coerceColor($val)) {
+                    $val = $color;
+                }
+
+                $i++;
+                $rep = $this->compileValue($this->lib_e($val));
+                $template = preg_replace(
+                    '/'.self::preg_quote($match).'/',
+                    $rep,
+                    $template,
+                    1
+                );
+            }
+        }
+
+        $d = $string[0] == "string" ? $string[1] : '"';
+        return array("string", $d, array($template));
+    }
+
+    protected function lib_floor($arg)
+    {
+        $value = $this->assertNumber($arg);
+        return array("number", floor($value), $arg[2]);
+    }
+
+    protected function lib_ceil($arg)
+    {
+        $value = $this->assertNumber($arg);
+        return array("number", ceil($value), $arg[2]);
+    }
+
+    protected function lib_round($arg)
+    {
+        if ($arg[0] != "list") {
+            $value = $this->assertNumber($arg);
+            return array("number", round($value), $arg[2]);
+        } else {
+            $value = $this->assertNumber($arg[2][0]);
+            $precision = $this->assertNumber($arg[2][1]);
+            return array("number", round($value, $precision), $arg[2][0][2]);
+        }
+    }
+
+    protected function lib_unit($arg)
+    {
+        if ($arg[0] == "list") {
+            list($number, $newUnit) = $arg[2];
+            return array("number", $this->assertNumber($number),
+                $this->compileValue($this->lib_e($newUnit)));
+        } else {
+            return array("number", $this->assertNumber($arg), "");
+        }
+    }
+
+    /**
+     * Helper function to get arguments for color manipulation functions.
+     * takes a list that contains a color like thing and a percentage
+     */
+    public function colorArgs($args)
+    {
+        if ($args[0] != 'list' || count($args[2]) < 2) {
+            return array(array('color', 0, 0, 0), 0);
+        }
+        list($color, $delta) = $args[2];
+        $color = $this->assertColor($color);
+        $delta = (float) $delta[1];
+
+        return array($color, $delta);
+    }
+
+    protected function lib_darken($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+
+        $hsl = $this->toHSL($color);
+        $hsl[3] = $this->clamp($hsl[3] - $delta, 100);
+        return $this->toRGB($hsl);
+    }
+
+    protected function lib_lighten($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+
+        $hsl = $this->toHSL($color);
+        $hsl[3] = $this->clamp($hsl[3] + $delta, 100);
+        return $this->toRGB($hsl);
+    }
+
+    protected function lib_saturate($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+
+        $hsl = $this->toHSL($color);
+        $hsl[2] = $this->clamp($hsl[2] + $delta, 100);
+        return $this->toRGB($hsl);
+    }
+
+    protected function lib_desaturate($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+
+        $hsl = $this->toHSL($color);
+        $hsl[2] = $this->clamp($hsl[2] - $delta, 100);
+        return $this->toRGB($hsl);
+    }
+
+    protected function lib_spin($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+
+        $hsl = $this->toHSL($color);
+
+        $hsl[1] = $hsl[1] + $delta % 360;
+        if ($hsl[1] < 0) {
+            $hsl[1] += 360;
+        }
+
+        return $this->toRGB($hsl);
+    }
+
+    protected function lib_fadeout($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+        $color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta / 100);
+        return $color;
+    }
+
+    protected function lib_fadein($args)
+    {
+        list($color, $delta) = $this->colorArgs($args);
+        $color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta / 100);
+        return $color;
+    }
+
+    protected function lib_hue($color)
+    {
+        $hsl = $this->toHSL($this->assertColor($color));
+        return round($hsl[1]);
+    }
+
+    protected function lib_saturation($color)
+    {
+        $hsl = $this->toHSL($this->assertColor($color));
+        return round($hsl[2]);
+    }
+
+    protected function lib_lightness($color)
+    {
+        $hsl = $this->toHSL($this->assertColor($color));
+        return round($hsl[3]);
+    }
+
+    // get the alpha of a color
+    // defaults to 1 for non-colors or colors without an alpha
+    protected function lib_alpha($value)
+    {
+        if (!is_null($color = $this->coerceColor($value))) {
+            return isset($color[4]) ? $color[4] : 1;
+        }
+        return '';
+    }
+
+    // set the alpha of the color
+    protected function lib_fade($args)
+    {
+        list($color, $alpha) = $this->colorArgs($args);
+        $color[4] = $this->clamp($alpha / 100.0);
+        return $color;
+    }
+
+    protected function lib_percentage($arg)
+    {
+        $num = $this->assertNumber($arg);
+        return array("number", $num * 100, "%");
+    }
+
+    /**
+     * Mix color with white in variable proportion.
+     *
+     * It is the same as calling `mix(#ffffff, @color, @weight)`.
+     *
+     *     tint(@color, [@weight: 50%]);
+     *
+     * http://lesscss.org/functions/#color-operations-tint
+     *
+     * @return array Color
+     */
+    protected function lib_tint($args)
+    {
+        $white = ['color', 255, 255, 255];
+        if ($args[0] == 'color') {
+            return $this->lib_mix(['list', ',', [$white, $args]]);
+        } elseif ($args[0] == "list" && count($args[2]) == 2) {
+            return $this->lib_mix([$args[0], $args[1], [$white, $args[2][0], $args[2][1]]]);
+        } else {
+            $this->throwError("tint expects (color, weight)");
+        }
+        return array();
+    }
+
+    /**
+     * Mix color with black in variable proportion.
+     *
+     * It is the same as calling `mix(#000000, @color, @weight)`
+     *
+     *     shade(@color, [@weight: 50%]);
+     *
+     * http://lesscss.org/functions/#color-operations-shade
+     *
+     * @return array Color
+     */
+    protected function lib_shade($args)
+    {
+        $black = ['color', 0, 0, 0];
+        if ($args[0] == 'color') {
+            return $this->lib_mix(['list', ',', [$black, $args]]);
+        } elseif ($args[0] == "list" && count($args[2]) == 2) {
+            return $this->lib_mix([$args[0], $args[1], [$black, $args[2][0], $args[2][1]]]);
+        } else {
+            $this->throwError("shade expects (color, weight)");
+        }
+        return array();
+    }
+
+    /**
+     * lib_mix
+     * mixes two colors by weight
+     * mix(@color1, @color2, [@weight: 50%]);
+     * http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
+     *
+     * @param array         $args   Args
+     * @return array
+     */
+    protected function lib_mix($args)
+    {
+        if ($args[0] != "list" || count($args[2]) < 2) {
+            $this->throwError("mix expects (color1, color2, weight)");
+        }
+
+        list($first, $second) = $args[2];
+        $first = $this->assertColor($first);
+        $second = $this->assertColor($second);
+
+        $first_a = $this->lib_alpha($first);
+        $second_a = $this->lib_alpha($second);
+
+        if (isset($args[2][2])) {
+            $weight = $args[2][2][1] / 100.0;
+        } else {
+            $weight = 0.5;
+        }
+
+        $w = $weight * 2 - 1;
+        $a = $first_a - $second_a;
+
+        $w1 = (($w * $a == -1 ? $w : ($w + $a) / (1 + $w * $a)) + 1) / 2.0;
+        $w2 = 1.0 - $w1;
+
+        $new = array('color',
+            $w1 * $first[1] + $w2 * $second[1],
+            $w1 * $first[2] + $w2 * $second[2],
+            $w1 * $first[3] + $w2 * $second[3],
+        );
+
+        if ($first_a != 1.0 || $second_a != 1.0) {
+            $new[] = $first_a * $weight + $second_a * ($weight - 1);
+        }
+
+        return $this->fixColor($new);
+    }
+
+    /**
+     * lib_contrast
+     *
+     * @param array         $args   Args
+     * @return array
+     */
+    protected function lib_contrast($args)
+    {
+        $darkColor  = array('color', 0, 0, 0);
+        $lightColor = array('color', 255, 255, 255);
+        $threshold  = 0.43;
+
+        if ($args[0] == 'list') {
+            $inputColor = (isset($args[2][0])) ? $this->assertColor($args[2][0]) : $lightColor;
+            $darkColor  = (isset($args[2][1])) ? $this->assertColor($args[2][1]) : $darkColor;
+            $lightColor = (isset($args[2][2])) ? $this->assertColor($args[2][2]) : $lightColor;
+            $threshold  = (isset($args[2][3])) ? $this->assertNumber($args[2][3]) : $threshold;
+        } else {
+            $inputColor = $this->assertColor($args);
+        }
+
+        $inputColor = $this->coerceColor($inputColor);
+        $darkColor  = $this->coerceColor($darkColor);
+        $lightColor = $this->coerceColor($lightColor);
+
+        //Figure out which is actually light and dark!
+        if ($this->toLuma($darkColor) > $this->toLuma($lightColor)) {
+            $t = $lightColor;
+            $lightColor = $darkColor;
+            $darkColor  = $t;
+        }
+
+        $inputColor_alpha = $this->lib_alpha($inputColor);
+        if (($this->toLuma($inputColor) * $inputColor_alpha) < $threshold) {
+            return $lightColor;
+        }
+        return $darkColor;
+    }
+
+    private function toLuma($color)
+    {
+        list(, $r, $g, $b) = $this->coerceColor($color);
+
+        $r = $r / 255;
+        $g = $g / 255;
+        $b = $b / 255;
+
+        $r = ($r <= 0.03928) ? $r / 12.92 : pow((($r + 0.055) / 1.055), 2.4);
+        $g = ($g <= 0.03928) ? $g / 12.92 : pow((($g + 0.055) / 1.055), 2.4);
+        $b = ($b <= 0.03928) ? $b / 12.92 : pow((($b + 0.055) / 1.055), 2.4);
+
+        return (0.2126 * $r) + (0.7152 * $g) + (0.0722 * $b);
+    }
+
+    protected function lib_luma($color)
+    {
+        return array("number", round($this->toLuma($color) * 100, 8), "%");
+    }
+
+
+    public function assertColor($value, $error = "expected color value")
+    {
+        $color = $this->coerceColor($value);
+        if (is_null($color)) {
+            $this->throwError($error);
+        }
+        return $color;
+    }
+
+    public function assertNumber($value, $error = "expecting number")
+    {
+        if ($value[0] == "number") {
+            return $value[1];
+        }
+        $this->throwError($error);
+    }
+
+    public function assertArgs($value, $expectedArgs, $name = "")
+    {
+        if ($expectedArgs == 1) {
+            return $value;
+        } else {
+            if ($value[0] !== "list" || $value[1] != ",") {
+                $this->throwError("expecting list");
+            }
+            $values = $value[2];
+            $numValues = count($values);
+            if ($expectedArgs != $numValues) {
+                if ($name) {
+                    $name = $name.": ";
+                }
+
+                $this->throwError("{$name}expecting $expectedArgs arguments, got $numValues");
+            }
+
+            return $values;
+        }
+    }
+
+    protected function toHSL($color)
+    {
+        if ($color[0] === 'hsl') {
+            return $color;
+        }
+
+        $r = $color[1] / 255;
+        $g = $color[2] / 255;
+        $b = $color[3] / 255;
+
+        $min = min($r, $g, $b);
+        $max = max($r, $g, $b);
+
+        $L = ($min + $max) / 2;
+        if ($min == $max) {
+            $S = $H = 0;
+        } else {
+            if ($L < 0.5) {
+                $S = ($max - $min) / ($max + $min);
+            } else {
+                $S = ($max - $min) / (2.0 - $max - $min);
+            }
+            if ($r == $max) {
+                $H = ($g - $b) / ($max - $min);
+            } elseif ($g == $max) {
+                $H = 2.0 + ($b - $r) / ($max - $min);
+            } elseif ($b == $max) {
+                $H = 4.0 + ($r - $g) / ($max - $min);
+            }
+        }
+
+        $out = array('hsl',
+            ($H < 0 ? $H + 6 : $H) * 60,
+            $S * 100,
+            $L * 100,
+        );
+
+        if (count($color) > 4) {
+            // copy alpha
+            $out[] = $color[4];
+        }
+        return $out;
+    }
+
+    protected function toRGB_helper($comp, $temp1, $temp2)
+    {
+        if ($comp < 0) {
+            $comp += 1.0;
+        } elseif ($comp > 1) {
+            $comp -= 1.0;
+        }
+
+        if (6 * $comp < 1) {
+            return $temp1 + ($temp2 - $temp1) * 6 * $comp;
+        }
+        if (2 * $comp < 1) {
+            return $temp2;
+        }
+        if (3 * $comp < 2) {
+            return $temp1 + ($temp2 - $temp1) * ((2 / 3) - $comp) * 6;
+        }
+
+        return $temp1;
+    }
+
+    /**
+     * Converts a hsl array into a color value in rgb.
+     * Expects H to be in range of 0 to 360, S and L in 0 to 100
+     */
+    protected function toRGB($color)
+    {
+        if ($color[0] === 'color') {
+            return $color;
+        }
+
+        $H = $color[1] / 360;
+        $S = $color[2] / 100;
+        $L = $color[3] / 100;
+
+        if ($S == 0) {
+            $r = $g = $b = $L;
+        } else {
+            $temp2 = $L < 0.5 ?
+                $L * (1.0 + $S) : $L + $S - $L * $S;
+
+            $temp1 = 2.0 * $L - $temp2;
+
+            $r = $this->toRGB_helper($H + 1 / 3, $temp1, $temp2);
+            $g = $this->toRGB_helper($H, $temp1, $temp2);
+            $b = $this->toRGB_helper($H - 1 / 3, $temp1, $temp2);
+        }
+
+        // $out = array('color', round($r*255), round($g*255), round($b*255));
+        $out = array('color', $r * 255, $g * 255, $b * 255);
+        if (count($color) > 4) {
+            // copy alpha
+            $out[] = $color[4];
+        }
+        return $out;
+    }
+
+    protected function clamp($v, $max = 1, $min = 0)
+    {
+        return min($max, max($min, $v));
+    }
+
+    /**
+     * Convert the rgb, rgba, hsl color literals of function type
+     * as returned by the parser into values of color type.
+     */
+    protected function funcToColor($func)
+    {
+        $fname = $func[1];
+        if ($func[2][0] != 'list') {
+            // need a list of arguments
+            return false;
+        }
+        $rawComponents = $func[2][2];
+
+        if ($fname == 'hsl' || $fname == 'hsla') {
+            $hsl = array('hsl');
+            $i = 0;
+            foreach ($rawComponents as $c) {
+                $val = $this->reduce($c);
+                $val = isset($val[1]) ? (float) $val[1] : 0;
+
+                if ($i == 0) {
+                    $clamp = 360;
+                } elseif ($i < 3) {
+                    $clamp = 100;
+                } else {
+                    $clamp = 1;
+                }
+
+                $hsl[] = $this->clamp($val, $clamp);
+                $i++;
+            }
+
+            while (count($hsl) < 4) {
+                $hsl[] = 0;
+            }
+            return $this->toRGB($hsl);
+
+        } elseif ($fname == 'rgb' || $fname == 'rgba') {
+            $components = array();
+            $i = 1;
+            foreach ($rawComponents as $c) {
+                $c = $this->reduce($c);
+                if ($i < 4) {
+                    if ($c[0] == "number" && $c[2] == "%") {
+                        $components[] = 255 * ($c[1] / 100);
+                    } else {
+                        $components[] = (float) $c[1];
+                    }
+                } elseif ($i == 4) {
+                    if ($c[0] == "number" && $c[2] == "%") {
+                        $components[] = 1.0 * ($c[1] / 100);
+                    } else {
+                        $components[] = (float) $c[1];
+                    }
+                } else {
+                    break;
+                }
+
+                $i++;
+            }
+            while (count($components) < 3) {
+                $components[] = 0;
+            }
+            array_unshift($components, 'color');
+            return $this->fixColor($components);
+        }
+
+        return false;
+    }
+
+    protected function reduce($value, $forExpression = false)
+    {
+        switch ($value[0]) {
+            case "interpolate":
+                $reduced = $this->reduce($value[1]);
+                $var = $this->compileValue($reduced);
+                $res = $this->reduce(array("variable", $this->vPrefix.$var));
+
+                if ($res[0] == "raw_color") {
+                    $res = $this->coerceColor($res);
+                }
+
+                if (empty($value[2])) {
+                    $res = $this->lib_e($res);
+                }
+
+                return $res;
+            case "variable":
+                $key = $value[1];
+                if (is_array($key)) {
+                    $key = $this->reduce($key);
+                    $key = $this->vPrefix.$this->compileValue($this->lib_e($key));
+                }
+
+                $seen = & $this->env->seenNames;
+
+                if (!empty($seen[$key])) {
+                    $this->throwError("infinite loop detected: $key");
+                }
+
+                $seen[$key] = true;
+                $out = $this->reduce($this->get($key));
+                $seen[$key] = false;
+                return $out;
+            case "list":
+                foreach ($value[2] as &$item) {
+                    $item = $this->reduce($item, $forExpression);
+                }
+                return $value;
+            case "expression":
+                return $this->evaluate($value);
+            case "string":
+                foreach ($value[2] as &$part) {
+                    if (is_array($part)) {
+                        $strip = $part[0] == "variable";
+                        $part = $this->reduce($part);
+                        if ($strip) {
+                            $part = $this->lib_e($part);
+                        }
+                    }
+                }
+                return $value;
+            case "escape":
+                list(, $inner) = $value;
+                return $this->lib_e($this->reduce($inner));
+            case "function":
+                $color = $this->funcToColor($value);
+                if ($color) {
+                    return $color;
+                }
+
+                list(, $name, $args) = $value;
+                if ($name == "%") {
+                    $name = "_sprintf";
+                }
+
+                $f = isset($this->libFunctions[$name]) ?
+                    $this->libFunctions[$name] : array($this, 'lib_'.str_replace('-', '_', $name));
+
+                if (is_callable($f)) {
+                    if ($args[0] == 'list') {
+                        $args = self::compressList($args[2], $args[1]);
+                    }
+
+                    $ret = call_user_func($f, $this->reduce($args, true), $this);
+
+                    if (is_null($ret)) {
+                        return array("string", "", array(
+                            $name, "(", $args, ")"
+                        ));
+                    }
+
+                    // convert to a typed value if the result is a php primitive
+                    if (is_numeric($ret)) {
+                        $ret = array('number', $ret, "");
+                    } elseif (!is_array($ret)) {
+                        $ret = array('keyword', $ret);
+                    }
+
+                    return $ret;
+                }
+
+                // plain function, reduce args
+                $value[2] = $this->reduce($value[2]);
+                return $value;
+            case "unary":
+                list(, $op, $exp) = $value;
+                $exp = $this->reduce($exp);
+
+                if ($exp[0] == "number") {
+                    switch ($op) {
+                        case "+":
+                            return $exp;
+                        case "-":
+                            $exp[1] *= -1;
+                            return $exp;
+                    }
+                }
+                return array("string", "", array($op, $exp));
+        }
+
+        if ($forExpression) {
+            switch ($value[0]) {
+                case "keyword":
+                    if ($color = $this->coerceColor($value)) {
+                        return $color;
+                    }
+                    break;
+                case "raw_color":
+                    return $this->coerceColor($value);
+            }
+        }
+
+        return $value;
+    }
+
+
+    // coerce a value for use in color operation
+    protected function coerceColor($value)
+    {
+        switch ($value[0]) {
+            case 'color':
+                return $value;
+            case 'raw_color':
+                $c = array("color", 0, 0, 0);
+                $colorStr = substr($value[1], 1);
+                $num = hexdec($colorStr);
+                $width = strlen($colorStr) == 3 ? 16 : 256;
+
+                for ($i = 3; $i > 0; $i--) { // 3 2 1
+                    $t = intval($num) % $width;
+                    $num /= $width;
+
+                    $c[$i] = $t * (256 / $width) + $t * floor(16/$width);
+                }
+
+                return $c;
+            case 'keyword':
+                $name = $value[1];
+                if (isset(self::$cssColors[$name])) {
+                    $rgba = explode(',', self::$cssColors[$name]);
+
+                    if (isset($rgba[3])) {
+                        return array('color', $rgba[0], $rgba[1], $rgba[2], $rgba[3]);
+                    }
+                    return array('color', $rgba[0], $rgba[1], $rgba[2]);
+                }
+                return null;
+        }
+        return null;
+    }
+
+    // make something string like into a string
+    protected function coerceString($value)
+    {
+        switch ($value[0]) {
+            case "string":
+                return $value;
+            case "keyword":
+                return array("string", "", array($value[1]));
+        }
+        return null;
+    }
+
+    // turn list of length 1 into value type
+    protected function flattenList($value)
+    {
+        if ($value[0] == "list" && count($value[2]) == 1) {
+            return $this->flattenList($value[2][0]);
+        }
+        return $value;
+    }
+
+    public function toBool($a)
+    {
+        return $a ? self::$TRUE : self::$FALSE;
+    }
+
+    // evaluate an expression
+    protected function evaluate($exp)
+    {
+        list(, $op, $left, $right, $whiteBefore, $whiteAfter) = $exp;
+
+        $left = $this->reduce($left, true);
+        $right = $this->reduce($right, true);
+
+        if ($leftColor = $this->coerceColor($left)) {
+            $left = $leftColor;
+        }
+
+        if ($rightColor = $this->coerceColor($right)) {
+            $right = $rightColor;
+        }
+
+        $ltype = $left[0];
+        $rtype = $right[0];
+
+        // operators that work on all types
+        if ($op == "and") {
+            return $this->toBool($left == self::$TRUE && $right == self::$TRUE);
+        }
+
+        if ($op == "=") {
+            return $this->toBool($this->eq($left, $right));
+        }
+
+        if ($op == "+" && !is_null($str = $this->stringConcatenate($left, $right))) {
+            return $str;
+        }
+
+        // type based operators
+        $fname = "op_{$ltype}_{$rtype}";
+        if (is_callable(array($this, $fname))) {
+            $out = $this->$fname($op, $left, $right);
+            if (!is_null($out)) {
+                return $out;
+            }
+        }
+
+        // make the expression look it did before being parsed
+        $paddedOp = $op;
+        if ($whiteBefore) {
+            $paddedOp = " ".$paddedOp;
+        }
+        if ($whiteAfter) {
+            $paddedOp .= " ";
+        }
+
+        return array("string", "", array($left, $paddedOp, $right));
+    }
+
+    protected function stringConcatenate($left, $right)
+    {
+        if ($strLeft = $this->coerceString($left)) {
+            if ($right[0] == "string") {
+                $right[1] = "";
+            }
+            $strLeft[2][] = $right;
+            return $strLeft;
+        }
+
+        if ($strRight = $this->coerceString($right)) {
+            array_unshift($strRight[2], $left);
+            return $strRight;
+        }
+        return '';
+    }
+
+
+    // make sure a color's components don't go out of bounds
+    protected function fixColor($c)
+    {
+        foreach (range(1, 3) as $i) {
+            if ($c[$i] < 0) {
+                $c[$i] = 0;
+            }
+            if ($c[$i] > 255) {
+                $c[$i] = 255;
+            }
+        }
+
+        return $c;
+    }
+
+    protected function op_number_color($op, $lft, $rgt)
+    {
+        if ($op == '+' || $op == '*') {
+            return $this->op_color_number($op, $rgt, $lft);
+        }
+        return array();
+    }
+
+    protected function op_color_number($op, $lft, $rgt)
+    {
+        if ($rgt[0] == '%') {
+            $rgt[1] /= 100;
+        }
+
+        return $this->op_color_color(
+            $op,
+            $lft,
+            array_fill(1, count($lft) - 1, $rgt[1])
+        );
+    }
+
+    protected function op_color_color($op, $left, $right)
+    {
+        $out = array('color');
+        $max = count($left) > count($right) ? count($left) : count($right);
+        foreach (range(1, $max - 1) as $i) {
+            $lval = isset($left[$i]) ? $left[$i] : 0;
+            $rval = isset($right[$i]) ? $right[$i] : 0;
+            switch ($op) {
+                case '+':
+                    $out[] = $lval + $rval;
+                    break;
+                case '-':
+                    $out[] = $lval - $rval;
+                    break;
+                case '*':
+                    $out[] = $lval * $rval;
+                    break;
+                case '%':
+                    $out[] = $lval % $rval;
+                    break;
+                case '/':
+                    if ($rval == 0) {
+                        $this->throwError("evaluate error: can't divide by zero");
+                    }
+                    $out[] = $lval / $rval;
+                    break;
+                default:
+                    $this->throwError('evaluate error: color op number failed on op '.$op);
+            }
+        }
+        return $this->fixColor($out);
+    }
+
+    public function lib_red($color)
+    {
+        $color = $this->coerceColor($color);
+        if (is_null($color)) {
+            $this->throwError('color expected for red()');
+        }
+
+        return $color[1];
+    }
+
+    public function lib_green($color)
+    {
+        $color = $this->coerceColor($color);
+        if (is_null($color)) {
+            $this->throwError('color expected for green()');
+        }
+
+        return $color[2];
+    }
+
+    public function lib_blue($color)
+    {
+        $color = $this->coerceColor($color);
+        if (is_null($color)) {
+            $this->throwError('color expected for blue()');
+        }
+
+        return $color[3];
+    }
+
+
+    // operator on two numbers
+    protected function op_number_number($op, $left, $right)
+    {
+        $unit = empty($left[2]) ? $right[2] : $left[2];
+
+        $value = 0;
+        switch ($op) {
+            case '+':
+                $value = $left[1] + $right[1];
+                break;
+            case '*':
+                $value = $left[1] * $right[1];
+                break;
+            case '-':
+                $value = $left[1] - $right[1];
+                break;
+            case '%':
+                $value = $left[1] % $right[1];
+                break;
+            case '/':
+                if ($right[1] == 0) {
+                    $this->throwError('parse error: divide by zero');
+                }
+                $value = $left[1] / $right[1];
+                break;
+            case '<':
+                return $this->toBool($left[1] < $right[1]);
+            case '>':
+                return $this->toBool($left[1] > $right[1]);
+            case '>=':
+                return $this->toBool($left[1] >= $right[1]);
+            case '=<':
+                return $this->toBool($left[1] <= $right[1]);
+            default:
+                $this->throwError('parse error: unknown number operator: '.$op);
+        }
+
+        return array("number", $value, $unit);
+    }
+
+
+    /* environment functions */
+
+    protected function makeOutputBlock($type, $selectors = null)
+    {
+        $b = new stdclass();
+        $b->lines = array();
+        $b->children = array();
+        $b->selectors = $selectors;
+        $b->type = $type;
+        $b->parent = $this->scope;
+        return $b;
+    }
+
+    // the state of execution
+    protected function pushEnv($block = null)
+    {
+        $e = new stdclass();
+        $e->parent = $this->env;
+        $e->store = array();
+        $e->block = $block;
+
+        $this->env = $e;
+        return $e;
+    }
+
+    // pop something off the stack
+    protected function popEnv()
+    {
+        $old = $this->env;
+        $this->env = $this->env->parent;
+        return $old;
+    }
+
+    // set something in the current env
+    protected function set($name, $value)
+    {
+        $this->env->store[$name] = $value;
+    }
+
+
+    // get the highest occurrence entry for a name
+    protected function get($name)
+    {
+        $current = $this->env;
+
+        $isArguments = $name == $this->vPrefix.'arguments';
+        while ($current) {
+            if ($isArguments && isset($current->arguments)) {
+                return array('list', ' ', $current->arguments);
+            }
+
+            if (isset($current->store[$name])) {
+                return $current->store[$name];
+            }
+
+            $current = isset($current->storeParent) ?
+                $current->storeParent : $current->parent;
+        }
+
+        $this->throwError("variable $name is undefined");
+    }
+
+    // inject array of unparsed strings into environment as variables
+    protected function injectVariables($args)
+    {
+        $this->pushEnv();
+        $parser = new lessc_parser($this, __METHOD__);
+        $value = null;
+        foreach ($args as $name => $strValue) {
+            if ($name[0] !== '@') {
+                $name = '@'.$name;
+            }
+            $parser->count = 0;
+            $parser->buffer = (string) $strValue;
+            if (!$parser->propertyValue($value)) {
+                throw new Exception("failed to parse passed in variable $name: $strValue");
+            }
+
+            $this->set($name, $value);
+        }
+    }
+
+    /**
+     * Initialize any static state, can initialize parser for a file
+     * $opts isn't used yet
+     */
+    public function __construct($fname = null)
+    {
+        if ($fname !== null) {
+            // used for deprecated parse method
+            $this->_parseFile = $fname;
+        }
+    }
+
+    public function compile($string, $name = null)
+    {
+        $locale = setlocale(LC_NUMERIC, 0);
+        setlocale(LC_NUMERIC, "C");
+
+        $this->parser = $this->makeParser($name);
+        $root = $this->parser->parse($string);
+
+        $this->env = null;
+        $this->scope = null;
+
+        $this->formatter = $this->newFormatter();
+
+        if (!empty($this->registeredVars)) {
+            $this->injectVariables($this->registeredVars);
+        }
+
+        $this->sourceParser = $this->parser; // used for error messages
+        $this->compileBlock($root);
+
+        ob_start();
+        $this->formatter->block($this->scope);
+        $out = ob_get_clean();
+        setlocale(LC_NUMERIC, $locale);
+        return $out;
+    }
+
+    public function compileFile($fname, $outFname = null)
+    {
+        if (!is_readable($fname)) {
+            throw new Exception('load error: failed to find '.$fname);
+        }
+
+        $pi = pathinfo($fname);
+
+        $oldImport = $this->importDir;
+
+        $this->importDir = (array) $this->importDir;
+        $this->importDir[] = $pi['dirname'].'/';
+
+        $this->addParsedFile($fname);
+
+        $out = $this->compile(file_get_contents($fname), $fname);
+
+        $this->importDir = $oldImport;
+
+        if ($outFname !== null) {
+            return file_put_contents($outFname, $out);
+        }
+
+        return $out;
+    }
+
+    // compile only if changed input has changed or output doesn't exist
+    public function checkedCompile($in, $out)
+    {
+        if (!is_file($out) || filemtime($in) > filemtime($out)) {
+            $this->compileFile($in, $out);
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Execute lessphp on a .less file or a lessphp cache structure
+     *
+     * The lessphp cache structure contains information about a specific
+     * less file having been parsed. It can be used as a hint for future
+     * calls to determine whether or not a rebuild is required.
+     *
+     * The cache structure contains two important keys that may be used
+     * externally:
+     *
+     * compiled: The final compiled CSS
+     * updated: The time (in seconds) the CSS was last compiled
+     *
+     * The cache structure is a plain-ol' PHP associative array and can
+     * be serialized and unserialized without a hitch.
+     *
+     * @param mixed $in Input
+     * @param bool $force Force rebuild?
+     * @return array|null lessphp cache structure
+     */
+    public function cachedCompile($in, $force = false)
+    {
+        // assume no root
+        $root = null;
+
+        if (is_string($in)) {
+            $root = $in;
+        } elseif (is_array($in) && isset($in['root'])) {
+            if ($force || !isset($in['files'])) {
+                // If we are forcing a recompile or if for some reason the
+                // structure does not contain any file information we should
+                // specify the root to trigger a rebuild.
+                $root = $in['root'];
+            } elseif (isset($in['files']) && is_array($in['files'])) {
+                foreach ($in['files'] as $fname => $ftime) {
+                    if (!file_exists($fname) || filemtime($fname) > $ftime) {
+                        // One of the files we knew about previously has changed
+                        // so we should look at our incoming root again.
+                        $root = $in['root'];
+                        break;
+                    }
+                }
+            }
+        } else {
+            // TODO: Throw an exception? We got neither a string nor something
+            // that looks like a compatible lessphp cache structure.
+            return null;
+        }
+
+        if ($root !== null) {
+            // If we have a root value which means we should rebuild.
+            $out = array();
+            $out['root'] = $root;
+            $out['compiled'] = $this->compileFile($root);
+            $out['files'] = $this->allParsedFiles();
+            $out['updated'] = time();
+            return $out;
+        } else {
+            // No changes, pass back the structure
+            // we were given initially.
+            return $in;
+        }
+    }
+
+    // parse and compile buffer
+    // This is deprecated
+    public function parse($str = null, $initialVariables = null)
+    {
+        if (is_array($str)) {
+            $initialVariables = $str;
+            $str = null;
+        }
+
+        $oldVars = $this->registeredVars;
+        if ($initialVariables !== null) {
+            $this->setVariables($initialVariables);
+        }
+
+        if ($str == null) {
+            if (empty($this->_parseFile)) {
+                throw new exception("nothing to parse");
+            }
+
+            $out = $this->compileFile($this->_parseFile);
+        } else {
+            $out = $this->compile($str);
+        }
+
+        $this->registeredVars = $oldVars;
+        return $out;
+    }
+
+    protected function makeParser($name)
+    {
+        $parser = new lessc_parser($this, $name);
+        $parser->writeComments = $this->preserveComments;
+
+        return $parser;
+    }
+
+    public function setFormatter($name)
+    {
+        $this->formatterName = $name;
+    }
+
+    protected function newFormatter()
+    {
+        $className = "lessc_formatter_lessjs";
+        if (!empty($this->formatterName)) {
+            if (!is_string($this->formatterName)) {
+                return $this->formatterName;
+            }
+            $className = "lessc_formatter_$this->formatterName";
+        }
+
+        return new $className();
+    }
+
+    public function setPreserveComments($preserve)
+    {
+        $this->preserveComments = $preserve;
+    }
+
+    public function registerFunction($name, $func)
+    {
+        $this->libFunctions[$name] = $func;
+    }
+
+    public function unregisterFunction($name)
+    {
+        unset($this->libFunctions[$name]);
+    }
+
+    public function setVariables($variables)
+    {
+        $this->registeredVars = array_merge($this->registeredVars, $variables);
+    }
+
+    public function unsetVariable($name)
+    {
+        unset($this->registeredVars[$name]);
+    }
+
+    public function setImportDir($dirs)
+    {
+        $this->importDir = (array) $dirs;
+    }
+
+    public function addImportDir($dir)
+    {
+        $this->importDir = (array) $this->importDir;
+        $this->importDir[] = $dir;
+    }
+
+    public function allParsedFiles()
+    {
+        return $this->allParsedFiles;
+    }
+
+    public function addParsedFile($file)
+    {
+        $this->allParsedFiles[realpath($file)] = filemtime($file);
+    }
+
+    /**
+     * Uses the current value of $this->count to show line and line number
+     */
+    public function throwError($msg = null)
+    {
+        if ($this->sourceLoc >= 0) {
+            $this->sourceParser->throwError($msg, $this->sourceLoc);
+        }
+        throw new exception($msg);
+    }
+
+    // compile file $in to file $out if $in is newer than $out
+    // returns true when it compiles, false otherwise
+    public static function ccompile($in, $out, $less = null)
+    {
+        if ($less === null) {
+            $less = new self();
+        }
+        return $less->checkedCompile($in, $out);
+    }
+
+    public static function cexecute($in, $force = false, $less = null)
+    {
+        if ($less === null) {
+            $less = new self();
+        }
+        return $less->cachedCompile($in, $force);
+    }
+
+    protected static $cssColors = array(
+        'aliceblue' => '240,248,255',
+        'antiquewhite' => '250,235,215',
+        'aqua' => '0,255,255',
+        'aquamarine' => '127,255,212',
+        'azure' => '240,255,255',
+        'beige' => '245,245,220',
+        'bisque' => '255,228,196',
+        'black' => '0,0,0',
+        'blanchedalmond' => '255,235,205',
+        'blue' => '0,0,255',
+        'blueviolet' => '138,43,226',
+        'brown' => '165,42,42',
+        'burlywood' => '222,184,135',
+        'cadetblue' => '95,158,160',
+        'chartreuse' => '127,255,0',
+        'chocolate' => '210,105,30',
+        'coral' => '255,127,80',
+        'cornflowerblue' => '100,149,237',
+        'cornsilk' => '255,248,220',
+        'crimson' => '220,20,60',
+        'cyan' => '0,255,255',
+        'darkblue' => '0,0,139',
+        'darkcyan' => '0,139,139',
+        'darkgoldenrod' => '184,134,11',
+        'darkgray' => '169,169,169',
+        'darkgreen' => '0,100,0',
+        'darkgrey' => '169,169,169',
+        'darkkhaki' => '189,183,107',
+        'darkmagenta' => '139,0,139',
+        'darkolivegreen' => '85,107,47',
+        'darkorange' => '255,140,0',
+        'darkorchid' => '153,50,204',
+        'darkred' => '139,0,0',
+        'darksalmon' => '233,150,122',
+        'darkseagreen' => '143,188,143',
+        'darkslateblue' => '72,61,139',
+        'darkslategray' => '47,79,79',
+        'darkslategrey' => '47,79,79',
+        'darkturquoise' => '0,206,209',
+        'darkviolet' => '148,0,211',
+        'deeppink' => '255,20,147',
+        'deepskyblue' => '0,191,255',
+        'dimgray' => '105,105,105',
+        'dimgrey' => '105,105,105',
+        'dodgerblue' => '30,144,255',
+        'firebrick' => '178,34,34',
+        'floralwhite' => '255,250,240',
+        'forestgreen' => '34,139,34',
+        'fuchsia' => '255,0,255',
+        'gainsboro' => '220,220,220',
+        'ghostwhite' => '248,248,255',
+        'gold' => '255,215,0',
+        'goldenrod' => '218,165,32',
+        'gray' => '128,128,128',
+        'green' => '0,128,0',
+        'greenyellow' => '173,255,47',
+        'grey' => '128,128,128',
+        'honeydew' => '240,255,240',
+        'hotpink' => '255,105,180',
+        'indianred' => '205,92,92',
+        'indigo' => '75,0,130',
+        'ivory' => '255,255,240',
+        'khaki' => '240,230,140',
+        'lavender' => '230,230,250',
+        'lavenderblush' => '255,240,245',
+        'lawngreen' => '124,252,0',
+        'lemonchiffon' => '255,250,205',
+        'lightblue' => '173,216,230',
+        'lightcoral' => '240,128,128',
+        'lightcyan' => '224,255,255',
+        'lightgoldenrodyellow' => '250,250,210',
+        'lightgray' => '211,211,211',
+        'lightgreen' => '144,238,144',
+        'lightgrey' => '211,211,211',
+        'lightpink' => '255,182,193',
+        'lightsalmon' => '255,160,122',
+        'lightseagreen' => '32,178,170',
+        'lightskyblue' => '135,206,250',
+        'lightslategray' => '119,136,153',
+        'lightslategrey' => '119,136,153',
+        'lightsteelblue' => '176,196,222',
+        'lightyellow' => '255,255,224',
+        'lime' => '0,255,0',
+        'limegreen' => '50,205,50',
+        'linen' => '250,240,230',
+        'magenta' => '255,0,255',
+        'maroon' => '128,0,0',
+        'mediumaquamarine' => '102,205,170',
+        'mediumblue' => '0,0,205',
+        'mediumorchid' => '186,85,211',
+        'mediumpurple' => '147,112,219',
+        'mediumseagreen' => '60,179,113',
+        'mediumslateblue' => '123,104,238',
+        'mediumspringgreen' => '0,250,154',
+        'mediumturquoise' => '72,209,204',
+        'mediumvioletred' => '199,21,133',
+        'midnightblue' => '25,25,112',
+        'mintcream' => '245,255,250',
+        'mistyrose' => '255,228,225',
+        'moccasin' => '255,228,181',
+        'navajowhite' => '255,222,173',
+        'navy' => '0,0,128',
+        'oldlace' => '253,245,230',
+        'olive' => '128,128,0',
+        'olivedrab' => '107,142,35',
+        'orange' => '255,165,0',
+        'orangered' => '255,69,0',
+        'orchid' => '218,112,214',
+        'palegoldenrod' => '238,232,170',
+        'palegreen' => '152,251,152',
+        'paleturquoise' => '175,238,238',
+        'palevioletred' => '219,112,147',
+        'papayawhip' => '255,239,213',
+        'peachpuff' => '255,218,185',
+        'peru' => '205,133,63',
+        'pink' => '255,192,203',
+        'plum' => '221,160,221',
+        'powderblue' => '176,224,230',
+        'purple' => '128,0,128',
+        'red' => '255,0,0',
+        'rosybrown' => '188,143,143',
+        'royalblue' => '65,105,225',
+        'saddlebrown' => '139,69,19',
+        'salmon' => '250,128,114',
+        'sandybrown' => '244,164,96',
+        'seagreen' => '46,139,87',
+        'seashell' => '255,245,238',
+        'sienna' => '160,82,45',
+        'silver' => '192,192,192',
+        'skyblue' => '135,206,235',
+        'slateblue' => '106,90,205',
+        'slategray' => '112,128,144',
+        'slategrey' => '112,128,144',
+        'snow' => '255,250,250',
+        'springgreen' => '0,255,127',
+        'steelblue' => '70,130,180',
+        'tan' => '210,180,140',
+        'teal' => '0,128,128',
+        'thistle' => '216,191,216',
+        'tomato' => '255,99,71',
+        'transparent' => '0,0,0,0',
+        'turquoise' => '64,224,208',
+        'violet' => '238,130,238',
+        'wheat' => '245,222,179',
+        'white' => '255,255,255',
+        'whitesmoke' => '245,245,245',
+        'yellow' => '255,255,0',
+        'yellowgreen' => '154,205,50'
+    );
 }
 
 // responsible for taking a string of LESS code and converting it into a
 // syntax tree
 class lessc_parser
 {
-	protected static $nextBlockId = 0; // used to uniquely identify blocks
-
-	protected static $precedence = array(
-		'=<' => 0,
-		'>=' => 0,
-		'=' => 0,
-		'<' => 0,
-		'>' => 0,
-
-		'+' => 1,
-		'-' => 1,
-		'*' => 2,
-		'/' => 2,
-		'%' => 2,
-	);
-
-	protected static $whitePattern;
-	protected static $commentMulti;
-
-	protected static $commentSingle = "//";
-	protected static $commentMultiLeft = "/*";
-	protected static $commentMultiRight = "*/";
-
-	// regex string to match any of the operators
-	protected static $operatorString;
-
-	// these properties will supress division unless it's inside parenthases
-	protected static $supressDivisionProps =
-		array('/border-radius$/i', '/^font$/i');
-
-	protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document", "viewport", "-moz-viewport", "-o-viewport", "-ms-viewport");
-	protected $lineDirectives = array("charset");
-
-	/**
-	 * if we are in parens we can be more liberal with whitespace around
-	 * operators because it must evaluate to a single value and thus is less
-	 * ambiguous.
-	 *
-	 * Consider:
-	 *     property1: 10 -5; // is two numbers, 10 and -5
-	 *     property2: (10 -5); // should evaluate to 5
-	 */
-	protected $inParens = false;
-
-	// caches preg escaped literals
-	protected static $literalCache = array();
-
-	public $env;
-	public $buffer;
-	public $count;
-	public $line;
-	public $eatWhiteDefault;
-	public $lessc;
-	public $sourceName;
-	public $writeComments;
-	public $seenComments;
-	public $currentProperty;
-	public $inExp;
-
-
-	public function __construct($lessc, $sourceName = null)
-	{
-		$this->eatWhiteDefault = true;
-		// reference to less needed for vPrefix, mPrefix, and parentSelector
-		$this->lessc = $lessc;
-
-		$this->sourceName = $sourceName; // name used for error messages
-
-		$this->writeComments = false;
-
-		if (!self::$operatorString) {
-			self::$operatorString =
-				'('.implode('|', array_map(
-					array('lessc', 'preg_quote'),
-					array_keys(self::$precedence)
-				)).')';
-
-			$commentSingle = Lessc::preg_quote(self::$commentSingle);
-			$commentMultiLeft = Lessc::preg_quote(self::$commentMultiLeft);
-			$commentMultiRight = Lessc::preg_quote(self::$commentMultiRight);
-
-			self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight;
-			self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais';
-		}
-	}
-
-	/**
-	 * Parse a string
-	 *
-	 * @param       string  $buffer         String to parse
-	 * @throws exception
-	 * @return NULL|stdclass
-	 */
-	public function parse($buffer)
-	{
-		$this->count = 0;
-		$this->line = 1;
-
-		$this->env = null; // block stack
-		$this->buffer = $this->writeComments ? $buffer : $this->removeComments($buffer);
-		$this->pushSpecialBlock("root");
-		$this->eatWhiteDefault = true;
-		$this->seenComments = array();
-
-		// trim whitespace on head
-		// if (preg_match('/^\s+/', $this->buffer, $m)) {
-		//  $this->line += substr_count($m[0], "\n");
-		//  $this->buffer = ltrim($this->buffer);
-		// }
-		$this->whitespace();
-
-		// parse the entire file
-		while (false !== $this->parseChunk());
-
-		if ($this->count != strlen($this->buffer)) {
-			$this->throwError('parse error count '.$this->count.' != len buffer '.strlen($this->buffer));
-
-		}
-
-		// TODO report where the block was opened
-		if (!property_exists($this->env, 'parent') || !is_null($this->env->parent)) {
-			throw new exception('parse error: unclosed block');
-		}
-
-		return $this->env;
-	}
-
-	/**
-	 * Parse a single chunk off the head of the buffer and append it to the
-	 * current parse environment.
-	 * Returns false when the buffer is empty, or when there is an error.
-	 *
-	 * This function is called repeatedly until the entire document is
-	 * parsed.
-	 *
-	 * This parser is most similar to a recursive descent parser. Single
-	 * functions represent discrete grammatical rules for the language, and
-	 * they are able to capture the text that represents those rules.
-	 *
-	 * Consider the function Lessc::keyword(). (all parse functions are
-	 * structured the same)
-	 *
-	 * The function takes a single reference argument. When calling the
-	 * function it will attempt to match a keyword on the head of the buffer.
-	 * If it is successful, it will place the keyword in the referenced
-	 * argument, advance the position in the buffer, and return true. If it
-	 * fails then it won't advance the buffer and it will return false.
-	 *
-	 * All of these parse functions are powered by Lessc::match(), which behaves
-	 * the same way, but takes a literal regular expression. Sometimes it is
-	 * more convenient to use match instead of creating a new function.
-	 *
-	 * Because of the format of the functions, to parse an entire string of
-	 * grammatical rules, you can chain them together using &&.
-	 *
-	 * But, if some of the rules in the chain succeed before one fails, then
-	 * the buffer position will be left at an invalid state. In order to
-	 * avoid this, Lessc::seek() is used to remember and set buffer positions.
-	 *
-	 * Before parsing a chain, use $s = $this->seek() to remember the current
-	 * position into $s. Then if a chain fails, use $this->seek($s) to
-	 * go back where we started.
-	 */
-	protected function parseChunk()
-	{
-		if (empty($this->buffer)) {
-			return false;
-		}
-		$s = $this->seek();
-
-		if ($this->whitespace()) {
-			return true;
-		}
-
-		$key = null;
-		$value = null;
-		$mediaQueries = null;
-		$dirName = null;
-		$dirValue = null;
-		$importValue = null;
-		$guards = null;
-		$tag = null;
-		$args = null;
-		$isVararg = null;
-		$argv = null;
-		$suffix = null;
-		$var = null;
-		$tags = null;
-
-		// setting a property
-		if ($this->keyword($key) && $this->assign() &&
-			$this->propertyValue($value, $key) && $this->end()
-		) {
-			$this->append(array('assign', $key, $value), $s);
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-
-		// look for special css blocks
-		if ($this->literal('@', false)) {
-			$this->count--;
-
-			// media
-			if ($this->literal('@media')) {
-				if ($this->mediaQueryList($mediaQueries)
-					&& $this->literal('{')
-				) {
-					$media = $this->pushSpecialBlock("media");
-					$media->queries = is_null($mediaQueries) ? array() : $mediaQueries;
-					return true;
-				} else {
-					$this->seek($s);
-					return false;
-				}
-			}
-
-			if ($this->literal("@", false) && $this->keyword($dirName)) {
-				if ($this->isDirective($dirName, $this->blockDirectives)) {
-					if ($this->openString("{", $dirValue, null, array(";")) &&
-						$this->literal("{")
-					) {
-						$dir = $this->pushSpecialBlock("directive");
-						$dir->name = $dirName;
-						if (isset($dirValue)) {
-							$dir->value = $dirValue;
-						}
-						return true;
-					}
-				} elseif ($this->isDirective($dirName, $this->lineDirectives)) {
-					if ($this->propertyValue($dirValue) && $this->end()) {
-						$this->append(array("directive", $dirName, $dirValue));
-						return true;
-					}
-				}
-			}
-
-			$this->seek($s);
-		}
-
-		// setting a variable
-		if ($this->variable($var) && $this->assign() &&
-			$this->propertyValue($value) && $this->end()
-		) {
-			$this->append(array('assign', $var, $value), $s);
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-		if ($this->import($importValue)) {
-			$this->append($importValue, $s);
-			return true;
-		}
-
-		// opening parametric mixin
-		if ($this->tag($tag, true) && $this->argumentDef($args, $isVararg) &&
-			$this->guards($guards) &&
-			$this->literal('{')
-		) {
-			$block = $this->pushBlock($this->fixTags(array($tag)));
-			$block->args = $args;
-			$block->isVararg = $isVararg;
-			if (!empty($guards)) {
-				$block->guards = $guards;
-			}
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-		// opening a simple block
-		if ($this->tags($tags) && $this->literal('{', false)) {
-			$tags = $this->fixTags($tags);
-			$this->pushBlock($tags);
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-		// closing a block
-		if ($this->literal('}', false)) {
-			try {
-				$block = $this->pop();
-			} catch (exception $e) {
-				$this->seek($s);
-				$this->throwError($e->getMessage());
-			}
-
-			$hidden = false;
-			if (is_null($block->type)) {
-				$hidden = true;
-				if (!isset($block->args)) {
-					foreach ($block->tags as $tag) {
-						if (!is_string($tag) || $tag[0] != $this->lessc->mPrefix) {
-							$hidden = false;
-							break;
-						}
-					}
-				}
-
-				foreach ($block->tags as $tag) {
-					if (is_string($tag)) {
-						$this->env->children[$tag][] = $block;
-					}
-				}
-			}
-
-			if (!$hidden) {
-				$this->append(array('block', $block), $s);
-			}
-
-			// this is done here so comments aren't bundled into he block that
-			// was just closed
-			$this->whitespace();
-			return true;
-		}
-
-		// mixin
-		if ($this->mixinTags($tags) &&
-			$this->argumentDef($argv, $isVararg) &&
-			$this->keyword($suffix)  && $this->end()
-		) {
-			$tags = $this->fixTags($tags);
-			$this->append(array('mixin', $tags, $argv, $suffix), $s);
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-		// spare ;
-		if ($this->literal(';')) {
-			return true;
-		}
-
-		return false; // got nothing, throw error
-	}
-
-	protected function isDirective($dirname, $directives)
-	{
-		// TODO: cache pattern in parser
-		$pattern = implode(
-			"|",
-			array_map(array("lessc", "preg_quote"), $directives)
-		);
-		$pattern = '/^(-[a-z-]+-)?('.$pattern.')$/i';
-
-		return preg_match($pattern, $dirname);
-	}
-
-	protected function fixTags($tags)
-	{
-		// move @ tags out of variable namespace
-		foreach ($tags as &$tag) {
-			if ($tag[0] == $this->lessc->vPrefix) {
-				$tag[0] = $this->lessc->mPrefix;
-			}
-		}
-		return $tags;
-	}
-
-	// a list of expressions
-	protected function expressionList(&$exps)
-	{
-		$exp = null;
-
-		$values = array();
-
-		while ($this->expression($exp)) {
-			$values[] = $exp;
-		}
-
-		if (count($values) == 0) {
-			return false;
-		}
-
-		$exps = Lessc::compressList($values, ' ');
-		return true;
-	}
-
-	/**
-	 * Attempt to consume an expression.
-	 * @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code
-	 */
-	protected function expression(&$out)
-	{
-		$lhs = null;
-		$rhs = null;
-
-		if ($this->value($lhs)) {
-			$out = $this->expHelper($lhs, 0);
-
-			// look for / shorthand
-			if (!empty($this->env->supressedDivision)) {
-				unset($this->env->supressedDivision);
-				$s = $this->seek();
-				if ($this->literal("/") && $this->value($rhs)) {
-					$out = array("list", "",
-						array($out, array("keyword", "/"), $rhs));
-				} else {
-					$this->seek($s);
-				}
-			}
-
-			return true;
-		}
-		return false;
-	}
-
-	/**
-	 * recursively parse infix equation with $lhs at precedence $minP
-	 */
-	protected function expHelper($lhs, $minP)
-	{
-		$next = null;
-		$rhs = null;
-
-		$this->inExp = true;
-		$ss = $this->seek();
-
-		while (true) {
-			$whiteBefore = isset($this->buffer[$this->count - 1]) &&
-				ctype_space($this->buffer[$this->count - 1]);
-
-			// If there is whitespace before the operator, then we require
-			// whitespace after the operator for it to be an expression
-			$needWhite = $whiteBefore && !$this->inParens;
-
-			$m = array();
-			if ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) {
-				if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) {
-					foreach (self::$supressDivisionProps as $pattern) {
-						if (preg_match($pattern, $this->env->currentProperty)) {
-							$this->env->supressedDivision = true;
-							break 2;
-						}
-					}
-				}
-
-
-				$whiteAfter = isset($this->buffer[$this->count - 1]) &&
-					ctype_space($this->buffer[$this->count - 1]);
-
-				if (!$this->value($rhs)) {
-					break;
-				}
-
-				// peek for next operator to see what to do with rhs
-				if ($this->peek(self::$operatorString, $next) && self::$precedence[$next[1]] > self::$precedence[$m[1]]) {
-					$rhs = $this->expHelper($rhs, self::$precedence[$next[1]]);
-				}
-
-				$lhs = array('expression', $m[1], $lhs, $rhs, $whiteBefore, $whiteAfter);
-				$ss = $this->seek();
-
-				continue;
-			}
-
-			break;
-		}
-
-		$this->seek($ss);
-
-		return $lhs;
-	}
-
-	// consume a list of values for a property
-	public function propertyValue(&$value, $keyName = null)
-	{
-		$v = null;
-		$values = array();
-
-		if ($keyName !== null) {
-			$this->env->currentProperty = $keyName;
-		}
-
-		$s = null;
-		while ($this->expressionList($v)) {
-			$values[] = $v;
-			$s = $this->seek();
-			if (!$this->literal(',')) {
-				break;
-			}
-		}
-
-		if ($s) {
-			$this->seek($s);
-		}
-
-		if ($keyName !== null) {
-			unset($this->env->currentProperty);
-		}
-
-		if (count($values) == 0) {
-			return false;
-		}
-
-		$value = Lessc::compressList($values, ', ');
-		return true;
-	}
-
-	protected function parenValue(&$out)
-	{
-		$exp = null;
-
-		$s = $this->seek();
-
-		// speed shortcut
-		if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "(") {
-			return false;
-		}
-
-		$inParens = $this->inParens;
-		if ($this->literal("(") &&
-			($this->inParens = true) && $this->expression($exp) &&
-			$this->literal(")")
-		) {
-			$out = $exp;
-			$this->inParens = $inParens;
-			return true;
-		} else {
-			$this->inParens = $inParens;
-			$this->seek($s);
-		}
-
-		return false;
-	}
-
-	// a single value
-	protected function value(&$value)
-	{
-		$inner = null;
-		$word = null;
-		$str = null;
-		$var = null;
-
-		$s = $this->seek();
-
-		// speed shortcut
-		if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "-") {
-			// negation
-			if ($this->literal("-", false) &&
-				(($this->variable($inner) && $inner = array("variable", $inner)) ||
-				$this->unit($inner) ||
-				$this->parenValue($inner))
-			) {
-				$value = array("unary", "-", $inner);
-				return true;
-			} else {
-				$this->seek($s);
-			}
-		}
-
-		if ($this->parenValue($value)) {
-			return true;
-		}
-		if ($this->unit($value)) {
-			return true;
-		}
-		if ($this->color($value)) {
-			return true;
-		}
-		if ($this->func($value)) {
-			return true;
-		}
-		if ($this->string($value)) {
-			return true;
-		}
-
-		if ($this->keyword($word)) {
-			$value = array('keyword', $word);
-			return true;
-		}
-
-		// try a variable
-		if ($this->variable($var)) {
-			$value = array('variable', $var);
-			return true;
-		}
-
-		// unquote string (should this work on any type?
-		if ($this->literal("~") && $this->string($str)) {
-			$value = array("escape", $str);
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-		// css hack: \0
-		$m = array();
-		if ($this->literal('\\') && $this->match('([0-9]+)', $m)) {
-			$value = array('keyword', '\\'.$m[1]);
-			return true;
-		} else {
-			$this->seek($s);
-		}
-
-		return false;
-	}
-
-	// an import statement
-	protected function import(&$out, $value = '')
-	{
-		if (!$this->literal('@import')) {
-			return false;
-		}
-
-		// @import "something.css" media;
-		// @import url("something.css") media;
-		// @import url(something.css) media;
-
-		if ($this->propertyValue($value)) {
-			$out = array("import", $value);
-			return true;
-		}
-
-		return false;
-	}
-
-	protected function mediaQueryList(&$out)
-	{
-		$list = null;
-
-		if ($this->genericList($list, "mediaQuery", ",", false)) {
-			$out = $list[2];
-			return true;
-		}
-		return false;
-	}
-
-	protected function mediaQuery(&$out)
-	{
-		$mediaType = null;
-
-		$s = $this->seek();
-
-		$expressions = null;
-		$parts = array();
-
-		if ((($this->literal("only") && ($only = true)) || ($this->literal("not") && ($not = true))) && $this->keyword($mediaType)) {
-			$prop = array("mediaType");
-			if (isset($only)) {
-				$prop[] = "only";
-			}
-			if (isset($not)) {
-				$prop[] = "not";
-			}
-			$prop[] = $mediaType;
-			$parts[] = $prop;
-		} else {
-			$this->seek($s);
-		}
-
-
-		if (!empty($mediaType) && !$this->literal("and")) {
-			// ~
-		} else {
-			$this->genericList($expressions, "mediaExpression", "and", false);
-			if (is_array($expressions)) {
-				$parts = array_merge($parts, $expressions[2]);
-			}
-		}
-
-		if (count($parts) == 0) {
-			$this->seek($s);
-			return false;
-		}
-
-		$out = $parts;
-		return true;
-	}
-
-	protected function mediaExpression(&$out)
-	{
-		$feature = null;
-		$variable = null;
-
-		$s = $this->seek();
-		$value = null;
-		if ($this->literal("(") &&
-			$this->keyword($feature) &&
-			($this->literal(":") && $this->expression($value)) &&
-			$this->literal(")")
-		) {
-			$out = array("mediaExp", $feature);
-			if ($value) {
-				$out[] = $value;
-			}
-			return true;
-		} elseif ($this->variable($variable)) {
-			$out = array('variable', $variable);
-			return true;
-		}
-
-		$this->seek($s);
-		return false;
-	}
-
-	// an unbounded string stopped by $end
-	protected function openString($end, &$out, $nestingOpen = null, $rejectStrs = null)
-	{
-		$str = null;
-		$inter = null;
-
-		$oldWhite = $this->eatWhiteDefault;
-		$this->eatWhiteDefault = false;
-
-		$stop = array("'", '"', "@{", $end);
-		$stop = array_map(array("lessc", "preg_quote"), $stop);
-		// $stop[] = self::$commentMulti;
-
-		if (!is_null($rejectStrs)) {
-			$stop = array_merge($stop, $rejectStrs);
-		}
-
-		$patt = '(.*?)('.implode("|", $stop).')';
-
-		$nestingLevel = 0;
-
-		$content = array();
-		$m = array();
-		while ($this->match($patt, $m, false)) {
-			if (!empty($m[1])) {
-				$content[] = $m[1];
-				if ($nestingOpen) {
-					$nestingLevel += substr_count($m[1], $nestingOpen);
-				}
-			}
-
-			$tok = $m[2];
-
-			$this->count -= strlen($tok);
-			if ($tok == $end) {
-				if ($nestingLevel == 0) {
-					break;
-				} else {
-					$nestingLevel--;
-				}
-			}
-
-			if (($tok == "'" || $tok == '"') && $this->string($str)) {
-				$content[] = $str;
-				continue;
-			}
-
-			if ($tok == "@{" && $this->interpolation($inter)) {
-				$content[] = $inter;
-				continue;
-			}
-
-			if (!empty($rejectStrs) && in_array($tok, $rejectStrs)) {
-				break;
-			}
-
-			$content[] = $tok;
-			$this->count += strlen($tok);
-		}
-
-		$this->eatWhiteDefault = $oldWhite;
-
-		if (count($content) == 0) {
-			return false;
-		}
-
-		// trim the end
-		if (is_string(end($content))) {
-			$content[count($content) - 1] = rtrim(end($content));
-		}
-
-		$out = array("string", "", $content);
-		return true;
-	}
-
-	protected function string(&$out)
-	{
-		$inter = null;
-
-		$s = $this->seek();
-		if ($this->literal('"', false)) {
-			$delim = '"';
-		} elseif ($this->literal("'", false)) {
-			$delim = "'";
-		} else {
-			return false;
-		}
-
-		$content = array();
-
-		// look for either ending delim , escape, or string interpolation
-		$patt = '([^\n]*?)(@\{|\\\\|'.
-			Lessc::preg_quote($delim).')';
-
-		$oldWhite = $this->eatWhiteDefault;
-		$this->eatWhiteDefault = false;
-
-		$m = array();
-		while ($this->match($patt, $m, false)) {
-			$content[] = $m[1];
-			if ($m[2] == "@{") {
-				$this->count -= strlen($m[2]);
-				if ($this->interpolation($inter)) {
-					$content[] = $inter;
-				} else {
-					$this->count += strlen($m[2]);
-					$content[] = "@{"; // ignore it
-				}
-			} elseif ($m[2] == '\\') {
-				$content[] = $m[2];
-				if ($this->literal($delim, false)) {
-					$content[] = $delim;
-				}
-			} else {
-				$this->count -= strlen($delim);
-				break; // delim
-			}
-		}
-
-		$this->eatWhiteDefault = $oldWhite;
-
-		if ($this->literal($delim)) {
-			$out = array("string", $delim, $content);
-			return true;
-		}
-
-		$this->seek($s);
-		return false;
-	}
-
-	protected function interpolation(&$out)
-	{
-		$interp = array();
-
-		$oldWhite = $this->eatWhiteDefault;
-		$this->eatWhiteDefault = true;
-
-		$s = $this->seek();
-		if ($this->literal("@{") &&
-			$this->openString("}", $interp, null, array("'", '"', ";")) &&
-			$this->literal("}", false)
-		) {
-			$out = array("interpolate", $interp);
-			$this->eatWhiteDefault = $oldWhite;
-			if ($this->eatWhiteDefault) {
-				$this->whitespace();
-			}
-			return true;
-		}
-
-		$this->eatWhiteDefault = $oldWhite;
-		$this->seek($s);
-		return false;
-	}
-
-	protected function unit(&$unit)
-	{
-		$m = array();
-
-		// speed shortcut
-		if (isset($this->buffer[$this->count])) {
-			$char = $this->buffer[$this->count];
-			if (!ctype_digit($char) && $char != ".") {
-				return false;
-			}
-		}
-
-		if ($this->match('([0-9]+(?:\.[0-9]*)?|\.[0-9]+)([%a-zA-Z]+)?', $m)) {
-			$unit = array("number", $m[1], empty($m[2]) ? "" : $m[2]);
-			return true;
-		}
-		return false;
-	}
-
-	// a # color
-	protected function color(&$out)
-	{
-		$m = array();
-
-		if ($this->match('(#(?:[0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{3}))', $m)) {
-			if (strlen($m[1]) > 7) {
-				$out = array("string", "", array($m[1]));
-			} else {
-				$out = array("raw_color", $m[1]);
-			}
-			return true;
-		}
-
-		return false;
-	}
-
-	// consume an argument definition list surrounded by ()
-	// each argument is a variable name with optional value
-	// or at the end a ... or a variable named followed by ...
-	// arguments are separated by , unless a ; is in the list, then ; is the
-	// delimiter.
-	protected function argumentDef(&$args, &$isVararg)
-	{
-		$value = array();
-		$rhs = null;
-
-		$s = $this->seek();
-		if (!$this->literal('(')) {
-			return false;
-		}
-
-		$values = array();
-		$delim = ",";
-		$method = "expressionList";
-
-		$isVararg = false;
-		while (true) {
-			if ($this->literal("...")) {
-				$isVararg = true;
-				break;
-			}
-
-			if ($this->$method($value)) {
-				if ($value[0] == "variable") {
-					$arg = array("arg", $value[1]);
-					$ss = $this->seek();
-
-					if ($this->assign() && $this->$method($rhs)) {
-						$arg[] = $rhs;
-					} else {
-						$this->seek($ss);
-						if ($this->literal("...")) {
-							$arg[0] = "rest";
-							$isVararg = true;
-						}
-					}
-
-					$values[] = $arg;
-					if ($isVararg) {
-						break;
-					}
-					continue;
-				} else {
-					$values[] = array("lit", $value);
-				}
-			}
-
-
-			if (!$this->literal($delim)) {
-				if ($delim == "," && $this->literal(";")) {
-					// found new delim, convert existing args
-					$delim = ";";
-					$method = "propertyValue";
-
-					// transform arg list
-					if (isset($values[1])) { // 2 items
-						$newList = array();
-						foreach ($values as $i => $arg) {
-							switch ($arg[0]) {
-								case "arg":
-									if ($i) {
-										$this->throwError("Cannot mix ; and , as delimiter types");
-									}
-									$newList[] = $arg[2];
-									break;
-								case "lit":
-									$newList[] = $arg[1];
-									break;
-								case "rest":
-									$this->throwError("Unexpected rest before semicolon");
-							}
-						}
-
-						$newList = array("list", ", ", $newList);
-
-						switch ($values[0][0]) {
-							case "arg":
-								$newArg = array("arg", $values[0][1], $newList);
-								break;
-							case "lit":
-								$newArg = array("lit", $newList);
-								break;
-						}
-
-					} elseif ($values) { // 1 item
-						$newArg = $values[0];
-					}
-
-					if ($newArg) {
-						$values = array($newArg);
-					}
-				} else {
-					break;
-				}
-			}
-		}
-
-		if (!$this->literal(')')) {
-			$this->seek($s);
-			return false;
-		}
-
-		$args = $values;
-
-		return true;
-	}
-
-	// consume a list of tags
-	// this accepts a hanging delimiter
-	protected function tags(&$tags, $simple = false, $delim = ',')
-	{
-		$tt = array();
-
-		$tags = array();
-		while ($this->tag($tt, $simple)) {
-			$tags[] = $tt;
-			if (!$this->literal($delim)) {
-				break;
-			}
-		}
-		if (count($tags) == 0) {
-			return false;
-		}
-
-		return true;
-	}
-
-	// list of tags of specifying mixin path
-	// optionally separated by > (lazy, accepts extra >)
-	protected function mixinTags(&$tags)
-	{
-		$tt = array();
-
-		$tags = array();
-		while ($this->tag($tt, true)) {
-			$tags[] = $tt;
-			$this->literal(">");
-		}
-
-		if (!$tags) {
-			return false;
-		}
-
-		return true;
-	}
-
-	// a bracketed value (contained within in a tag definition)
-	protected function tagBracket(&$parts, &$hasExpression)
-	{
-		$str = null;
-		$inter = null;
-		$word = null;
-
-		// speed shortcut
-		if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[") {
-			return false;
-		}
-
-		$s = $this->seek();
-
-		$hasInterpolation = false;
-
-		if ($this->literal("[", false)) {
-			$attrParts = array("[");
-			// keyword, string, operator
-			while (true) {
-				if ($this->literal("]", false)) {
-					$this->count--;
-					break; // get out early
-				}
-
-				$m = array();
-				if ($this->match('\s+', $m)) {
-					$attrParts[] = " ";
-					continue;
-				}
-				if ($this->string($str)) {
-					// escape parent selector, (yuck)
-					foreach ($str[2] as &$chunk) {
-						$chunk = str_replace($this->lessc->parentSelector, "$&$", $chunk);
-					}
-
-					$attrParts[] = $str;
-					$hasInterpolation = true;
-					continue;
-				}
-
-				if ($this->keyword($word)) {
-					$attrParts[] = $word;
-					continue;
-				}
-
-				if ($this->interpolation($inter)) {
-					$attrParts[] = $inter;
-					$hasInterpolation = true;
-					continue;
-				}
-
-				// operator, handles attr namespace too
-				if ($this->match('[|-~\$\*\^=]+', $m)) {
-					$attrParts[] = $m[0];
-					continue;
-				}
-
-				break;
-			}
-
-			if ($this->literal("]", false)) {
-				$attrParts[] = "]";
-				foreach ($attrParts as $part) {
-					$parts[] = $part;
-				}
-				$hasExpression = $hasExpression || $hasInterpolation;
-				return true;
-			}
-			$this->seek($s);
-		}
-
-		$this->seek($s);
-		return false;
-	}
-
-	// a space separated list of selectors
-	protected function tag(&$tag, $simple = false)
-	{
-		$interp = null;
-		$unit = null;
-
-		if ($simple) {
-			$chars = '^@,:;{}\][>\(\) "\'';
-		} else {
-			$chars = '^@,;{}["\'';
-		}
-		$s = $this->seek();
-
-		$hasExpression = false;
-		$parts = array();
-		while ($this->tagBracket($parts, $hasExpression));
-
-		$oldWhite = $this->eatWhiteDefault;
-		$this->eatWhiteDefault = false;
-
-		while (true) {
-			$m = array();
-			if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) {
-				$parts[] = $m[1];
-				if ($simple) {
-					break;
-				}
-
-				while ($this->tagBracket($parts, $hasExpression));
-				continue;
-			}
-
-			if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@") {
-				if ($this->interpolation($interp)) {
-					$hasExpression = true;
-					$interp[2] = true; // don't unescape
-					$parts[] = $interp;
-					continue;
-				}
-
-				if ($this->literal("@")) {
-					$parts[] = "@";
-					continue;
-				}
-			}
-
-			if ($this->unit($unit)) { // for keyframes
-				$parts[] = $unit[1];
-				$parts[] = $unit[2];
-				continue;
-			}
-
-			break;
-		}
-
-		$this->eatWhiteDefault = $oldWhite;
-		if (!$parts) {
-			$this->seek($s);
-			return false;
-		}
-
-		if ($hasExpression) {
-			$tag = array("exp", array("string", "", $parts));
-		} else {
-			$tag = trim(implode($parts));
-		}
-
-		$this->whitespace();
-		return true;
-	}
-
-	// a css function
-	protected function func(&$func)
-	{
-		$s = $this->seek();
-
-		$m = array();
-		$value = array();
-		$string = array();
-		$name = null;
-
-		if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) {
-			$fname = $m[1];
-
-			$sPreArgs = $this->seek();
-
-			$args = array();
-			while (true) {
-				$ss = $this->seek();
-				// this ugly nonsense is for ie filter properties
-				if ($this->keyword($name) && $this->literal('=') && $this->expressionList($value)) {
-					$args[] = array("string", "", array($name, "=", $value));
-				} else {
-					$this->seek($ss);
-					if ($this->expressionList($value)) {
-						$args[] = $value;
-					}
-				}
-
-				if (!$this->literal(',')) {
-					break;
-				}
-			}
-			$args = array('list', ',', $args);
-
-			if ($this->literal(')')) {
-				$func = array('function', $fname, $args);
-				return true;
-			} elseif ($fname == 'url') {
-				// couldn't parse and in url? treat as string
-				$this->seek($sPreArgs);
-				if ($this->openString(")", $string) && $this->literal(")")) {
-					$func = array('function', $fname, $string);
-					return true;
-				}
-			}
-		}
-
-		$this->seek($s);
-		return false;
-	}
-
-	// consume a less variable
-	protected function variable(&$name)
-	{
-		$sub = null;
-		$name = null;
-
-		$s = $this->seek();
-		if ($this->literal($this->lessc->vPrefix, false) &&
-			($this->variable($sub) || $this->keyword($name))
-		) {
-			if (!empty($sub)) {
-				$name = array('variable', $sub);
-			} else {
-				$name = $this->lessc->vPrefix.$name;
-			}
-			return true;
-		}
-
-		$name = null;
-		$this->seek($s);
-		return false;
-	}
-
-	/**
-	 * Consume an assignment operator
-	 * Can optionally take a name that will be set to the current property name
-	 */
-	protected function assign($name = null)
-	{
-		if ($name) {
-			$this->currentProperty = $name;
-		}
-		return $this->literal(':') || $this->literal('=');
-	}
-
-	// consume a keyword
-	protected function keyword(&$word)
-	{
-		$m = array();
-		if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m)) {
-			$word = $m[1];
-			return true;
-		}
-		return false;
-	}
-
-	// consume an end of statement delimiter
-	protected function end()
-	{
-		if ($this->literal(';', false)) {
-			return true;
-		} elseif ($this->count == strlen($this->buffer) || $this->buffer[$this->count] == '}') {
-			// if there is end of file or a closing block next then we don't need a ;
-			return true;
-		}
-		return false;
-	}
-
-	protected function guards(&$guards)
-	{
-		$g = null;
-
-		$s = $this->seek();
-
-		if (!$this->literal("when")) {
-			$this->seek($s);
-			return false;
-		}
-
-		$guards = array();
-
-		while ($this->guardGroup($g)) {
-			$guards[] = $g;
-			if (!$this->literal(",")) {
-				break;
-			}
-		}
-
-		if (count($guards) == 0) {
-			$guards = null;
-			$this->seek($s);
-			return false;
-		}
-
-		return true;
-	}
-
-	// a bunch of guards that are and'd together
-	// TODO rename to guardGroup
-	protected function guardGroup(&$guardGroup)
-	{
-		$guard = null;
-
-		$s = $this->seek();
-		$guardGroup = array();
-		while ($this->guard($guard)) {
-			$guardGroup[] = $guard;
-			if (!$this->literal("and")) {
-				break;
-			}
-		}
-
-		if (count($guardGroup) == 0) {
-			$guardGroup = null;
-			$this->seek($s);
-			return false;
-		}
-
-		return true;
-	}
-
-	protected function guard(&$guard)
-	{
-		$exp = null;
-
-		$s = $this->seek();
-		$negate = $this->literal("not");
-
-		if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) {
-			$guard = $exp;
-			if ($negate) {
-				$guard = array("negate", $guard);
-			}
-			return true;
-		}
-
-		$this->seek($s);
-		return false;
-	}
-
-	/* raw parsing functions */
-
-	protected function literal($what, $eatWhitespace = null)
-	{
-		if ($eatWhitespace === null) {
-			$eatWhitespace = $this->eatWhiteDefault;
-		}
-
-		// shortcut on single letter
-		if (!isset($what[1]) && isset($this->buffer[$this->count])) {
-			if ($this->buffer[$this->count] == $what) {
-				if (!$eatWhitespace) {
-					$this->count++;
-					return true;
-				}
-			// goes below...
-			} else {
-				return false;
-			}
-		}
-
-		if (!isset(self::$literalCache[$what])) {
-			self::$literalCache[$what] = Lessc::preg_quote($what);
-		}
-
-		$m = array();
-		return $this->match(self::$literalCache[$what], $m, $eatWhitespace);
-	}
-
-	protected function genericList(&$out, $parseItem, $delim = "", $flatten = true)
-	{
-		$value = null;
-
-		$s = $this->seek();
-		$items = array();
-		while ($this->$parseItem($value)) {
-			$items[] = $value;
-			if ($delim) {
-				if (!$this->literal($delim)) {
-					break;
-				}
-			}
-		}
-
-		if (count($items) == 0) {
-			$this->seek($s);
-			return false;
-		}
-
-		if ($flatten && count($items) == 1) {
-			$out = $items[0];
-		} else {
-			$out = array("list", $delim, $items);
-		}
-
-		return true;
-	}
-
-
-	// advance counter to next occurrence of $what
-	// $until - don't include $what in advance
-	// $allowNewline, if string, will be used as valid char set
-	protected function to($what, &$out, $until = false, $allowNewline = false)
-	{
-		if (is_string($allowNewline)) {
-			$validChars = $allowNewline;
-		} else {
-			$validChars = $allowNewline ? "." : "[^\n]";
-		}
-		$m = array();
-		if (!$this->match('('.$validChars.'*?)'.Lessc::preg_quote($what), $m, !$until)) {
-			return false;
-		}
-		if ($until) {
-			$this->count -= strlen($what); // give back $what
-		}
-		$out = $m[1];
-		return true;
-	}
-
-	// try to match something on head of buffer
-	protected function match($regex, &$out, $eatWhitespace = null)
-	{
-		if ($eatWhitespace === null) {
-			$eatWhitespace = $this->eatWhiteDefault;
-		}
-
-		$r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais';
-		if (preg_match($r, $this->buffer, $out, 0, $this->count)) {
-			$this->count += strlen($out[0]);
-			if ($eatWhitespace && $this->writeComments) {
-				$this->whitespace();
-			}
-			return true;
-		}
-		return false;
-	}
-
-	// match some whitespace
-	protected function whitespace()
-	{
-		if ($this->writeComments) {
-			$gotWhite = false;
-			$m = array();
-			while (preg_match(self::$whitePattern, $this->buffer, $m, 0, $this->count)) {
-				if (isset($m[1]) && empty($this->seenComments[$this->count])) {
-					$this->append(array("comment", $m[1]));
-					$this->seenComments[$this->count] = true;
-				}
-				$this->count += strlen($m[0]);
-				$gotWhite = true;
-			}
-			return $gotWhite;
-		} else {
-			$this->match("", $m);
-			return strlen($m[0]) > 0;
-		}
-	}
-
-	// match something without consuming it
-	protected function peek($regex, &$out = null, $from = null)
-	{
-		if (is_null($from)) {
-			$from = $this->count;
-		}
-		$r = '/'.$regex.'/Ais';
-		$result = preg_match($r, $this->buffer, $out, 0, $from);
-
-		return $result;
-	}
-
-	// seek to a spot in the buffer or return where we are on no argument
-	protected function seek($where = null)
-	{
-		if ($where === null) {
-			return $this->count;
-		} else {
-			$this->count = $where;
-		}
-		return true;
-	}
-
-	/* misc functions */
-
-	public function throwError($msg = "parse error", $count = null)
-	{
-		$count = is_null($count) ? $this->count : $count;
-
-		$line = $this->line +
-			substr_count(substr($this->buffer, 0, $count), "\n");
-
-		if (!empty($this->sourceName)) {
-			$loc = "$this->sourceName on line $line";
-		} else {
-			$loc = "line: $line";
-		}
-
-		// TODO this depends on $this->count
-		$m = array();
-		if ($this->peek("(.*?)(\n|$)", $m, $count)) {
-			throw new exception("$msg: failed at `$m[1]` $loc");
-		} else {
-			throw new exception("$msg: $loc");
-		}
-	}
-
-	protected function pushBlock($selectors = null, $type = null)
-	{
-		$b = new stdclass();
-		$b->parent = $this->env;
-
-		$b->type = $type;
-		$b->id = self::$nextBlockId++;
-
-		$b->isVararg = false; // TODO: kill me from here
-		$b->tags = $selectors;
-
-		$b->props = array();
-		$b->children = array();
-
-		$this->env = $b;
-		return $b;
-	}
-
-	// push a block that doesn't multiply tags
-	protected function pushSpecialBlock($type)
-	{
-		return $this->pushBlock(null, $type);
-	}
-
-	// append a property to the current block
-	protected function append($prop, $pos = null)
-	{
-		if ($pos !== null) {
-			$prop[-1] = $pos;
-		}
-		$this->env->props[] = $prop;
-	}
-
-	// pop something off the stack
-	protected function pop()
-	{
-		$old = $this->env;
-		$this->env = $this->env->parent;
-		return $old;
-	}
-
-	// remove comments from $text
-	// todo: make it work for all functions, not just url
-	protected function removeComments($text)
-	{
-		$look = array(
-			'url(', '//', '/*', '"', "'"
-		);
-
-		$out = '';
-		$min = null;
-		while (true) {
-			// find the next item
-			foreach ($look as $token) {
-				$pos = strpos($text, $token);
-				if ($pos !== false) {
-					if (!isset($min) || $pos < $min[1]) {
-						$min = array($token, $pos);
-					}
-				}
-			}
-
-			if (is_null($min)) {
-				break;
-			}
-
-			$count = $min[1];
-			$skip = 0;
-			$newlines = 0;
-			switch ($min[0]) {
-				case 'url(':
-					$m = array();
-					if (preg_match('/url\(.*?\)/', $text, $m, 0, $count)) {
-						$count += strlen($m[0]) - strlen($min[0]);
-					}
-					break;
-				case '"':
-				case "'":
-					$m = array();
-					if (preg_match('/'.$min[0].'.*?(?<!\\\\)'.$min[0].'/', $text, $m, 0, $count)) {
-						$count += strlen($m[0]) - 1;
-					}
-					break;
-				case '//':
-					$skip = strpos($text, "\n", $count);
-					if ($skip === false) {
-						$skip = strlen($text) - $count;
-					} else {
-						$skip -= $count;
-					}
-					break;
-				case '/*':
-					$m = array();
-					if (preg_match('/\/\*.*?\*\//s', $text, $m, 0, $count)) {
-						$skip = strlen($m[0]);
-						$newlines = substr_count($m[0], "\n");
-					}
-					break;
-			}
-
-			if ($skip == 0) {
-				$count += strlen($min[0]);
-			}
-
-			$out .= substr($text, 0, $count).str_repeat("\n", $newlines);
-			$text = substr($text, $count + $skip);
-
-			$min = null;
-		}
-
-		return $out.$text;
-	}
+    protected static $nextBlockId = 0; // used to uniquely identify blocks
+
+    protected static $precedence = array(
+        '=<' => 0,
+        '>=' => 0,
+        '=' => 0,
+        '<' => 0,
+        '>' => 0,
+
+        '+' => 1,
+        '-' => 1,
+        '*' => 2,
+        '/' => 2,
+        '%' => 2,
+    );
+
+    protected static $whitePattern;
+    protected static $commentMulti;
+
+    protected static $commentSingle = "//";
+    protected static $commentMultiLeft = "/*";
+    protected static $commentMultiRight = "*/";
+
+    // regex string to match any of the operators
+    protected static $operatorString;
+
+    // these properties will supress division unless it's inside parenthases
+    protected static $supressDivisionProps =
+        array('/border-radius$/i', '/^font$/i');
+
+    protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document", "viewport", "-moz-viewport", "-o-viewport", "-ms-viewport");
+    protected $lineDirectives = array("charset");
+
+    /**
+     * if we are in parens we can be more liberal with whitespace around
+     * operators because it must evaluate to a single value and thus is less
+     * ambiguous.
+     *
+     * Consider:
+     *     property1: 10 -5; // is two numbers, 10 and -5
+     *     property2: (10 -5); // should evaluate to 5
+     */
+    protected $inParens = false;
+
+    // caches preg escaped literals
+    protected static $literalCache = array();
+
+    public $env;
+    public $buffer;
+    public $count;
+    public $line;
+    public $eatWhiteDefault;
+    public $lessc;
+    public $sourceName;
+    public $writeComments;
+    public $seenComments;
+    public $currentProperty;
+    public $inExp;
+
+
+    public function __construct($lessc, $sourceName = null)
+    {
+        $this->eatWhiteDefault = true;
+        // reference to less needed for vPrefix, mPrefix, and parentSelector
+        $this->lessc = $lessc;
+
+        $this->sourceName = $sourceName; // name used for error messages
+
+        $this->writeComments = false;
+
+        if (!self::$operatorString) {
+            self::$operatorString =
+                '('.implode('|', array_map(
+                    array('lessc', 'preg_quote'),
+                    array_keys(self::$precedence)
+                )).')';
+
+            $commentSingle = Lessc::preg_quote(self::$commentSingle);
+            $commentMultiLeft = Lessc::preg_quote(self::$commentMultiLeft);
+            $commentMultiRight = Lessc::preg_quote(self::$commentMultiRight);
+
+            self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight;
+            self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais';
+        }
+    }
+
+    /**
+     * Parse a string
+     *
+     * @param       string  $buffer         String to parse
+     * @throws exception
+     * @return NULL|stdclass
+     */
+    public function parse($buffer)
+    {
+        $this->count = 0;
+        $this->line = 1;
+
+        $this->env = null; // block stack
+        $this->buffer = $this->writeComments ? $buffer : $this->removeComments($buffer);
+        $this->pushSpecialBlock("root");
+        $this->eatWhiteDefault = true;
+        $this->seenComments = array();
+
+        // trim whitespace on head
+        // if (preg_match('/^\s+/', $this->buffer, $m)) {
+        //  $this->line += substr_count($m[0], "\n");
+        //  $this->buffer = ltrim($this->buffer);
+        // }
+        $this->whitespace();
+
+        // parse the entire file
+        while (false !== $this->parseChunk());
+
+        if ($this->count != strlen($this->buffer)) {
+            $this->throwError('parse error count '.$this->count.' != len buffer '.strlen($this->buffer));
+
+        }
+
+        // TODO report where the block was opened
+        if (!property_exists($this->env, 'parent') || !is_null($this->env->parent)) {
+            throw new exception('parse error: unclosed block');
+        }
+
+        return $this->env;
+    }
+
+    /**
+     * Parse a single chunk off the head of the buffer and append it to the
+     * current parse environment.
+     * Returns false when the buffer is empty, or when there is an error.
+     *
+     * This function is called repeatedly until the entire document is
+     * parsed.
+     *
+     * This parser is most similar to a recursive descent parser. Single
+     * functions represent discrete grammatical rules for the language, and
+     * they are able to capture the text that represents those rules.
+     *
+     * Consider the function Lessc::keyword(). (all parse functions are
+     * structured the same)
+     *
+     * The function takes a single reference argument. When calling the
+     * function it will attempt to match a keyword on the head of the buffer.
+     * If it is successful, it will place the keyword in the referenced
+     * argument, advance the position in the buffer, and return true. If it
+     * fails then it won't advance the buffer and it will return false.
+     *
+     * All of these parse functions are powered by Lessc::match(), which behaves
+     * the same way, but takes a literal regular expression. Sometimes it is
+     * more convenient to use match instead of creating a new function.
+     *
+     * Because of the format of the functions, to parse an entire string of
+     * grammatical rules, you can chain them together using &&.
+     *
+     * But, if some of the rules in the chain succeed before one fails, then
+     * the buffer position will be left at an invalid state. In order to
+     * avoid this, Lessc::seek() is used to remember and set buffer positions.
+     *
+     * Before parsing a chain, use $s = $this->seek() to remember the current
+     * position into $s. Then if a chain fails, use $this->seek($s) to
+     * go back where we started.
+     */
+    protected function parseChunk()
+    {
+        if (empty($this->buffer)) {
+            return false;
+        }
+        $s = $this->seek();
+
+        if ($this->whitespace()) {
+            return true;
+        }
+
+        $key = null;
+        $value = null;
+        $mediaQueries = null;
+        $dirName = null;
+        $dirValue = null;
+        $importValue = null;
+        $guards = null;
+        $tag = null;
+        $args = null;
+        $isVararg = null;
+        $argv = null;
+        $suffix = null;
+        $var = null;
+        $tags = null;
+
+        // setting a property
+        if ($this->keyword($key) && $this->assign() &&
+            $this->propertyValue($value, $key) && $this->end()
+        ) {
+            $this->append(array('assign', $key, $value), $s);
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+
+        // look for special css blocks
+        if ($this->literal('@', false)) {
+            $this->count--;
+
+            // media
+            if ($this->literal('@media')) {
+                if ($this->mediaQueryList($mediaQueries)
+                    && $this->literal('{')
+                ) {
+                    $media = $this->pushSpecialBlock("media");
+                    $media->queries = is_null($mediaQueries) ? array() : $mediaQueries;
+                    return true;
+                } else {
+                    $this->seek($s);
+                    return false;
+                }
+            }
+
+            if ($this->literal("@", false) && $this->keyword($dirName)) {
+                if ($this->isDirective($dirName, $this->blockDirectives)) {
+                    if ($this->openString("{", $dirValue, null, array(";")) &&
+                        $this->literal("{")
+                    ) {
+                        $dir = $this->pushSpecialBlock("directive");
+                        $dir->name = $dirName;
+                        if (isset($dirValue)) {
+                            $dir->value = $dirValue;
+                        }
+                        return true;
+                    }
+                } elseif ($this->isDirective($dirName, $this->lineDirectives)) {
+                    if ($this->propertyValue($dirValue) && $this->end()) {
+                        $this->append(array("directive", $dirName, $dirValue));
+                        return true;
+                    }
+                }
+            }
+
+            $this->seek($s);
+        }
+
+        // setting a variable
+        if ($this->variable($var) && $this->assign() &&
+            $this->propertyValue($value) && $this->end()
+        ) {
+            $this->append(array('assign', $var, $value), $s);
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+        if ($this->import($importValue)) {
+            $this->append($importValue, $s);
+            return true;
+        }
+
+        // opening parametric mixin
+        if ($this->tag($tag, true) && $this->argumentDef($args, $isVararg) &&
+            $this->guards($guards) &&
+            $this->literal('{')
+        ) {
+            $block = $this->pushBlock($this->fixTags(array($tag)));
+            $block->args = $args;
+            $block->isVararg = $isVararg;
+            if (!empty($guards)) {
+                $block->guards = $guards;
+            }
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+        // opening a simple block
+        if ($this->tags($tags) && $this->literal('{', false)) {
+            $tags = $this->fixTags($tags);
+            $this->pushBlock($tags);
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+        // closing a block
+        if ($this->literal('}', false)) {
+            try {
+                $block = $this->pop();
+            } catch (exception $e) {
+                $this->seek($s);
+                $this->throwError($e->getMessage());
+            }
+
+            $hidden = false;
+            if (is_null($block->type)) {
+                $hidden = true;
+                if (!isset($block->args)) {
+                    foreach ($block->tags as $tag) {
+                        if (!is_string($tag) || $tag[0] != $this->lessc->mPrefix) {
+                            $hidden = false;
+                            break;
+                        }
+                    }
+                }
+
+                foreach ($block->tags as $tag) {
+                    if (is_string($tag)) {
+                        $this->env->children[$tag][] = $block;
+                    }
+                }
+            }
+
+            if (!$hidden) {
+                $this->append(array('block', $block), $s);
+            }
+
+            // this is done here so comments aren't bundled into he block that
+            // was just closed
+            $this->whitespace();
+            return true;
+        }
+
+        // mixin
+        if ($this->mixinTags($tags) &&
+            $this->argumentDef($argv, $isVararg) &&
+            $this->keyword($suffix)  && $this->end()
+        ) {
+            $tags = $this->fixTags($tags);
+            $this->append(array('mixin', $tags, $argv, $suffix), $s);
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+        // spare ;
+        if ($this->literal(';')) {
+            return true;
+        }
+
+        return false; // got nothing, throw error
+    }
+
+    protected function isDirective($dirname, $directives)
+    {
+        // TODO: cache pattern in parser
+        $pattern = implode(
+            "|",
+            array_map(array("lessc", "preg_quote"), $directives)
+        );
+        $pattern = '/^(-[a-z-]+-)?('.$pattern.')$/i';
+
+        return preg_match($pattern, $dirname);
+    }
+
+    protected function fixTags($tags)
+    {
+        // move @ tags out of variable namespace
+        foreach ($tags as &$tag) {
+            if ($tag[0] == $this->lessc->vPrefix) {
+                $tag[0] = $this->lessc->mPrefix;
+            }
+        }
+        return $tags;
+    }
+
+    // a list of expressions
+    protected function expressionList(&$exps)
+    {
+        $exp = null;
+
+        $values = array();
+
+        while ($this->expression($exp)) {
+            $values[] = $exp;
+        }
+
+        if (count($values) == 0) {
+            return false;
+        }
+
+        $exps = Lessc::compressList($values, ' ');
+        return true;
+    }
+
+    /**
+     * Attempt to consume an expression.
+     * @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code
+     */
+    protected function expression(&$out)
+    {
+        $lhs = null;
+        $rhs = null;
+
+        if ($this->value($lhs)) {
+            $out = $this->expHelper($lhs, 0);
+
+            // look for / shorthand
+            if (!empty($this->env->supressedDivision)) {
+                unset($this->env->supressedDivision);
+                $s = $this->seek();
+                if ($this->literal("/") && $this->value($rhs)) {
+                    $out = array("list", "",
+                        array($out, array("keyword", "/"), $rhs));
+                } else {
+                    $this->seek($s);
+                }
+            }
+
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * recursively parse infix equation with $lhs at precedence $minP
+     */
+    protected function expHelper($lhs, $minP)
+    {
+        $next = null;
+        $rhs = null;
+
+        $this->inExp = true;
+        $ss = $this->seek();
+
+        while (true) {
+            $whiteBefore = isset($this->buffer[$this->count - 1]) &&
+                ctype_space($this->buffer[$this->count - 1]);
+
+            // If there is whitespace before the operator, then we require
+            // whitespace after the operator for it to be an expression
+            $needWhite = $whiteBefore && !$this->inParens;
+
+            $m = array();
+            if ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) {
+                if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) {
+                    foreach (self::$supressDivisionProps as $pattern) {
+                        if (preg_match($pattern, $this->env->currentProperty)) {
+                            $this->env->supressedDivision = true;
+                            break 2;
+                        }
+                    }
+                }
+
+
+                $whiteAfter = isset($this->buffer[$this->count - 1]) &&
+                    ctype_space($this->buffer[$this->count - 1]);
+
+                if (!$this->value($rhs)) {
+                    break;
+                }
+
+                // peek for next operator to see what to do with rhs
+                if ($this->peek(self::$operatorString, $next) && self::$precedence[$next[1]] > self::$precedence[$m[1]]) {
+                    $rhs = $this->expHelper($rhs, self::$precedence[$next[1]]);
+                }
+
+                $lhs = array('expression', $m[1], $lhs, $rhs, $whiteBefore, $whiteAfter);
+                $ss = $this->seek();
+
+                continue;
+            }
+
+            break;
+        }
+
+        $this->seek($ss);
+
+        return $lhs;
+    }
+
+    // consume a list of values for a property
+    public function propertyValue(&$value, $keyName = null)
+    {
+        $v = null;
+        $values = array();
+
+        if ($keyName !== null) {
+            $this->env->currentProperty = $keyName;
+        }
+
+        $s = null;
+        while ($this->expressionList($v)) {
+            $values[] = $v;
+            $s = $this->seek();
+            if (!$this->literal(',')) {
+                break;
+            }
+        }
+
+        if ($s) {
+            $this->seek($s);
+        }
+
+        if ($keyName !== null) {
+            unset($this->env->currentProperty);
+        }
+
+        if (count($values) == 0) {
+            return false;
+        }
+
+        $value = Lessc::compressList($values, ', ');
+        return true;
+    }
+
+    protected function parenValue(&$out)
+    {
+        $exp = null;
+
+        $s = $this->seek();
+
+        // speed shortcut
+        if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "(") {
+            return false;
+        }
+
+        $inParens = $this->inParens;
+        if ($this->literal("(") &&
+            ($this->inParens = true) && $this->expression($exp) &&
+            $this->literal(")")
+        ) {
+            $out = $exp;
+            $this->inParens = $inParens;
+            return true;
+        } else {
+            $this->inParens = $inParens;
+            $this->seek($s);
+        }
+
+        return false;
+    }
+
+    // a single value
+    protected function value(&$value)
+    {
+        $inner = null;
+        $word = null;
+        $str = null;
+        $var = null;
+
+        $s = $this->seek();
+
+        // speed shortcut
+        if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "-") {
+            // negation
+            if ($this->literal("-", false) &&
+                (($this->variable($inner) && $inner = array("variable", $inner)) ||
+                $this->unit($inner) ||
+                $this->parenValue($inner))
+            ) {
+                $value = array("unary", "-", $inner);
+                return true;
+            } else {
+                $this->seek($s);
+            }
+        }
+
+        if ($this->parenValue($value)) {
+            return true;
+        }
+        if ($this->unit($value)) {
+            return true;
+        }
+        if ($this->color($value)) {
+            return true;
+        }
+        if ($this->func($value)) {
+            return true;
+        }
+        if ($this->string($value)) {
+            return true;
+        }
+
+        if ($this->keyword($word)) {
+            $value = array('keyword', $word);
+            return true;
+        }
+
+        // try a variable
+        if ($this->variable($var)) {
+            $value = array('variable', $var);
+            return true;
+        }
+
+        // unquote string (should this work on any type?
+        if ($this->literal("~") && $this->string($str)) {
+            $value = array("escape", $str);
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+        // css hack: \0
+        $m = array();
+        if ($this->literal('\\') && $this->match('([0-9]+)', $m)) {
+            $value = array('keyword', '\\'.$m[1]);
+            return true;
+        } else {
+            $this->seek($s);
+        }
+
+        return false;
+    }
+
+    // an import statement
+    protected function import(&$out, $value = '')
+    {
+        if (!$this->literal('@import')) {
+            return false;
+        }
+
+        // @import "something.css" media;
+        // @import url("something.css") media;
+        // @import url(something.css) media;
+
+        if ($this->propertyValue($value)) {
+            $out = array("import", $value);
+            return true;
+        }
+
+        return false;
+    }
+
+    protected function mediaQueryList(&$out)
+    {
+        $list = null;
+
+        if ($this->genericList($list, "mediaQuery", ",", false)) {
+            $out = $list[2];
+            return true;
+        }
+        return false;
+    }
+
+    protected function mediaQuery(&$out)
+    {
+        $mediaType = null;
+
+        $s = $this->seek();
+
+        $expressions = null;
+        $parts = array();
+
+        if ((($this->literal("only") && ($only = true)) || ($this->literal("not") && ($not = true))) && $this->keyword($mediaType)) {
+            $prop = array("mediaType");
+            if (isset($only)) {
+                $prop[] = "only";
+            }
+            if (isset($not)) {
+                $prop[] = "not";
+            }
+            $prop[] = $mediaType;
+            $parts[] = $prop;
+        } else {
+            $this->seek($s);
+        }
+
+
+        if (!empty($mediaType) && !$this->literal("and")) {
+            // ~
+        } else {
+            $this->genericList($expressions, "mediaExpression", "and", false);
+            if (is_array($expressions)) {
+                $parts = array_merge($parts, $expressions[2]);
+            }
+        }
+
+        if (count($parts) == 0) {
+            $this->seek($s);
+            return false;
+        }
+
+        $out = $parts;
+        return true;
+    }
+
+    protected function mediaExpression(&$out)
+    {
+        $feature = null;
+        $variable = null;
+
+        $s = $this->seek();
+        $value = null;
+        if ($this->literal("(") &&
+            $this->keyword($feature) &&
+            ($this->literal(":") && $this->expression($value)) &&
+            $this->literal(")")
+        ) {
+            $out = array("mediaExp", $feature);
+            if ($value) {
+                $out[] = $value;
+            }
+            return true;
+        } elseif ($this->variable($variable)) {
+            $out = array('variable', $variable);
+            return true;
+        }
+
+        $this->seek($s);
+        return false;
+    }
+
+    // an unbounded string stopped by $end
+    protected function openString($end, &$out, $nestingOpen = null, $rejectStrs = null)
+    {
+        $str = null;
+        $inter = null;
+
+        $oldWhite = $this->eatWhiteDefault;
+        $this->eatWhiteDefault = false;
+
+        $stop = array("'", '"', "@{", $end);
+        $stop = array_map(array("lessc", "preg_quote"), $stop);
+        // $stop[] = self::$commentMulti;
+
+        if (!is_null($rejectStrs)) {
+            $stop = array_merge($stop, $rejectStrs);
+        }
+
+        $patt = '(.*?)('.implode("|", $stop).')';
+
+        $nestingLevel = 0;
+
+        $content = array();
+        $m = array();
+        while ($this->match($patt, $m, false)) {
+            if (!empty($m[1])) {
+                $content[] = $m[1];
+                if ($nestingOpen) {
+                    $nestingLevel += substr_count($m[1], $nestingOpen);
+                }
+            }
+
+            $tok = $m[2];
+
+            $this->count -= strlen($tok);
+            if ($tok == $end) {
+                if ($nestingLevel == 0) {
+                    break;
+                } else {
+                    $nestingLevel--;
+                }
+            }
+
+            if (($tok == "'" || $tok == '"') && $this->string($str)) {
+                $content[] = $str;
+                continue;
+            }
+
+            if ($tok == "@{" && $this->interpolation($inter)) {
+                $content[] = $inter;
+                continue;
+            }
+
+            if (!empty($rejectStrs) && in_array($tok, $rejectStrs)) {
+                break;
+            }
+
+            $content[] = $tok;
+            $this->count += strlen($tok);
+        }
+
+        $this->eatWhiteDefault = $oldWhite;
+
+        if (count($content) == 0) {
+            return false;
+        }
+
+        // trim the end
+        if (is_string(end($content))) {
+            $content[count($content) - 1] = rtrim(end($content));
+        }
+
+        $out = array("string", "", $content);
+        return true;
+    }
+
+    protected function string(&$out)
+    {
+        $inter = null;
+
+        $s = $this->seek();
+        if ($this->literal('"', false)) {
+            $delim = '"';
+        } elseif ($this->literal("'", false)) {
+            $delim = "'";
+        } else {
+            return false;
+        }
+
+        $content = array();
+
+        // look for either ending delim , escape, or string interpolation
+        $patt = '([^\n]*?)(@\{|\\\\|'.
+            Lessc::preg_quote($delim).')';
+
+        $oldWhite = $this->eatWhiteDefault;
+        $this->eatWhiteDefault = false;
+
+        $m = array();
+        while ($this->match($patt, $m, false)) {
+            $content[] = $m[1];
+            if ($m[2] == "@{") {
+                $this->count -= strlen($m[2]);
+                if ($this->interpolation($inter)) {
+                    $content[] = $inter;
+                } else {
+                    $this->count += strlen($m[2]);
+                    $content[] = "@{"; // ignore it
+                }
+            } elseif ($m[2] == '\\') {
+                $content[] = $m[2];
+                if ($this->literal($delim, false)) {
+                    $content[] = $delim;
+                }
+            } else {
+                $this->count -= strlen($delim);
+                break; // delim
+            }
+        }
+
+        $this->eatWhiteDefault = $oldWhite;
+
+        if ($this->literal($delim)) {
+            $out = array("string", $delim, $content);
+            return true;
+        }
+
+        $this->seek($s);
+        return false;
+    }
+
+    protected function interpolation(&$out)
+    {
+        $interp = array();
+
+        $oldWhite = $this->eatWhiteDefault;
+        $this->eatWhiteDefault = true;
+
+        $s = $this->seek();
+        if ($this->literal("@{") &&
+            $this->openString("}", $interp, null, array("'", '"', ";")) &&
+            $this->literal("}", false)
+        ) {
+            $out = array("interpolate", $interp);
+            $this->eatWhiteDefault = $oldWhite;
+            if ($this->eatWhiteDefault) {
+                $this->whitespace();
+            }
+            return true;
+        }
+
+        $this->eatWhiteDefault = $oldWhite;
+        $this->seek($s);
+        return false;
+    }
+
+    protected function unit(&$unit)
+    {
+        $m = array();
+
+        // speed shortcut
+        if (isset($this->buffer[$this->count])) {
+            $char = $this->buffer[$this->count];
+            if (!ctype_digit($char) && $char != ".") {
+                return false;
+            }
+        }
+
+        if ($this->match('([0-9]+(?:\.[0-9]*)?|\.[0-9]+)([%a-zA-Z]+)?', $m)) {
+            $unit = array("number", $m[1], empty($m[2]) ? "" : $m[2]);
+            return true;
+        }
+        return false;
+    }
+
+    // a # color
+    protected function color(&$out)
+    {
+        $m = array();
+
+        if ($this->match('(#(?:[0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{3}))', $m)) {
+            if (strlen($m[1]) > 7) {
+                $out = array("string", "", array($m[1]));
+            } else {
+                $out = array("raw_color", $m[1]);
+            }
+            return true;
+        }
+
+        return false;
+    }
+
+    // consume an argument definition list surrounded by ()
+    // each argument is a variable name with optional value
+    // or at the end a ... or a variable named followed by ...
+    // arguments are separated by , unless a ; is in the list, then ; is the
+    // delimiter.
+    protected function argumentDef(&$args, &$isVararg)
+    {
+        $value = array();
+        $rhs = null;
+
+        $s = $this->seek();
+        if (!$this->literal('(')) {
+            return false;
+        }
+
+        $values = array();
+        $delim = ",";
+        $method = "expressionList";
+
+        $isVararg = false;
+        while (true) {
+            if ($this->literal("...")) {
+                $isVararg = true;
+                break;
+            }
+
+            if ($this->$method($value)) {
+                if ($value[0] == "variable") {
+                    $arg = array("arg", $value[1]);
+                    $ss = $this->seek();
+
+                    if ($this->assign() && $this->$method($rhs)) {
+                        $arg[] = $rhs;
+                    } else {
+                        $this->seek($ss);
+                        if ($this->literal("...")) {
+                            $arg[0] = "rest";
+                            $isVararg = true;
+                        }
+                    }
+
+                    $values[] = $arg;
+                    if ($isVararg) {
+                        break;
+                    }
+                    continue;
+                } else {
+                    $values[] = array("lit", $value);
+                }
+            }
+
+
+            if (!$this->literal($delim)) {
+                if ($delim == "," && $this->literal(";")) {
+                    // found new delim, convert existing args
+                    $delim = ";";
+                    $method = "propertyValue";
+
+                    // transform arg list
+                    if (isset($values[1])) { // 2 items
+                        $newList = array();
+                        foreach ($values as $i => $arg) {
+                            switch ($arg[0]) {
+                                case "arg":
+                                    if ($i) {
+                                        $this->throwError("Cannot mix ; and , as delimiter types");
+                                    }
+                                    $newList[] = $arg[2];
+                                    break;
+                                case "lit":
+                                    $newList[] = $arg[1];
+                                    break;
+                                case "rest":
+                                    $this->throwError("Unexpected rest before semicolon");
+                            }
+                        }
+
+                        $newList = array("list", ", ", $newList);
+
+                        switch ($values[0][0]) {
+                            case "arg":
+                                $newArg = array("arg", $values[0][1], $newList);
+                                break;
+                            case "lit":
+                                $newArg = array("lit", $newList);
+                                break;
+                        }
+
+                    } elseif ($values) { // 1 item
+                        $newArg = $values[0];
+                    }
+
+                    if ($newArg) {
+                        $values = array($newArg);
+                    }
+                } else {
+                    break;
+                }
+            }
+        }
+
+        if (!$this->literal(')')) {
+            $this->seek($s);
+            return false;
+        }
+
+        $args = $values;
+
+        return true;
+    }
+
+    // consume a list of tags
+    // this accepts a hanging delimiter
+    protected function tags(&$tags, $simple = false, $delim = ',')
+    {
+        $tt = array();
+
+        $tags = array();
+        while ($this->tag($tt, $simple)) {
+            $tags[] = $tt;
+            if (!$this->literal($delim)) {
+                break;
+            }
+        }
+        if (count($tags) == 0) {
+            return false;
+        }
+
+        return true;
+    }
+
+    // list of tags of specifying mixin path
+    // optionally separated by > (lazy, accepts extra >)
+    protected function mixinTags(&$tags)
+    {
+        $tt = array();
+
+        $tags = array();
+        while ($this->tag($tt, true)) {
+            $tags[] = $tt;
+            $this->literal(">");
+        }
+
+        if (!$tags) {
+            return false;
+        }
+
+        return true;
+    }
+
+    // a bracketed value (contained within in a tag definition)
+    protected function tagBracket(&$parts, &$hasExpression)
+    {
+        $str = null;
+        $inter = null;
+        $word = null;
+
+        // speed shortcut
+        if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[") {
+            return false;
+        }
+
+        $s = $this->seek();
+
+        $hasInterpolation = false;
+
+        if ($this->literal("[", false)) {
+            $attrParts = array("[");
+            // keyword, string, operator
+            while (true) {
+                if ($this->literal("]", false)) {
+                    $this->count--;
+                    break; // get out early
+                }
+
+                $m = array();
+                if ($this->match('\s+', $m)) {
+                    $attrParts[] = " ";
+                    continue;
+                }
+                if ($this->string($str)) {
+                    // escape parent selector, (yuck)
+                    foreach ($str[2] as &$chunk) {
+                        $chunk = str_replace($this->lessc->parentSelector, "$&$", $chunk);
+                    }
+
+                    $attrParts[] = $str;
+                    $hasInterpolation = true;
+                    continue;
+                }
+
+                if ($this->keyword($word)) {
+                    $attrParts[] = $word;
+                    continue;
+                }
+
+                if ($this->interpolation($inter)) {
+                    $attrParts[] = $inter;
+                    $hasInterpolation = true;
+                    continue;
+                }
+
+                // operator, handles attr namespace too
+                if ($this->match('[|-~\$\*\^=]+', $m)) {
+                    $attrParts[] = $m[0];
+                    continue;
+                }
+
+                break;
+            }
+
+            if ($this->literal("]", false)) {
+                $attrParts[] = "]";
+                foreach ($attrParts as $part) {
+                    $parts[] = $part;
+                }
+                $hasExpression = $hasExpression || $hasInterpolation;
+                return true;
+            }
+            $this->seek($s);
+        }
+
+        $this->seek($s);
+        return false;
+    }
+
+    // a space separated list of selectors
+    protected function tag(&$tag, $simple = false)
+    {
+        $interp = null;
+        $unit = null;
+
+        if ($simple) {
+            $chars = '^@,:;{}\][>\(\) "\'';
+        } else {
+            $chars = '^@,;{}["\'';
+        }
+        $s = $this->seek();
+
+        $hasExpression = false;
+        $parts = array();
+        while ($this->tagBracket($parts, $hasExpression));
+
+        $oldWhite = $this->eatWhiteDefault;
+        $this->eatWhiteDefault = false;
+
+        while (true) {
+            $m = array();
+            if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) {
+                $parts[] = $m[1];
+                if ($simple) {
+                    break;
+                }
+
+                while ($this->tagBracket($parts, $hasExpression));
+                continue;
+            }
+
+            if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@") {
+                if ($this->interpolation($interp)) {
+                    $hasExpression = true;
+                    $interp[2] = true; // don't unescape
+                    $parts[] = $interp;
+                    continue;
+                }
+
+                if ($this->literal("@")) {
+                    $parts[] = "@";
+                    continue;
+                }
+            }
+
+            if ($this->unit($unit)) { // for keyframes
+                $parts[] = $unit[1];
+                $parts[] = $unit[2];
+                continue;
+            }
+
+            break;
+        }
+
+        $this->eatWhiteDefault = $oldWhite;
+        if (!$parts) {
+            $this->seek($s);
+            return false;
+        }
+
+        if ($hasExpression) {
+            $tag = array("exp", array("string", "", $parts));
+        } else {
+            $tag = trim(implode($parts));
+        }
+
+        $this->whitespace();
+        return true;
+    }
+
+    // a css function
+    protected function func(&$func)
+    {
+        $s = $this->seek();
+
+        $m = array();
+        $value = array();
+        $string = array();
+        $name = null;
+
+        if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) {
+            $fname = $m[1];
+
+            $sPreArgs = $this->seek();
+
+            $args = array();
+            while (true) {
+                $ss = $this->seek();
+                // this ugly nonsense is for ie filter properties
+                if ($this->keyword($name) && $this->literal('=') && $this->expressionList($value)) {
+                    $args[] = array("string", "", array($name, "=", $value));
+                } else {
+                    $this->seek($ss);
+                    if ($this->expressionList($value)) {
+                        $args[] = $value;
+                    }
+                }
+
+                if (!$this->literal(',')) {
+                    break;
+                }
+            }
+            $args = array('list', ',', $args);
+
+            if ($this->literal(')')) {
+                $func = array('function', $fname, $args);
+                return true;
+            } elseif ($fname == 'url') {
+                // couldn't parse and in url? treat as string
+                $this->seek($sPreArgs);
+                if ($this->openString(")", $string) && $this->literal(")")) {
+                    $func = array('function', $fname, $string);
+                    return true;
+                }
+            }
+        }
+
+        $this->seek($s);
+        return false;
+    }
+
+    // consume a less variable
+    protected function variable(&$name)
+    {
+        $sub = null;
+        $name = null;
+
+        $s = $this->seek();
+        if ($this->literal($this->lessc->vPrefix, false) &&
+            ($this->variable($sub) || $this->keyword($name))
+        ) {
+            if (!empty($sub)) {
+                $name = array('variable', $sub);
+            } else {
+                $name = $this->lessc->vPrefix.$name;
+            }
+            return true;
+        }
+
+        $name = null;
+        $this->seek($s);
+        return false;
+    }
+
+    /**
+     * Consume an assignment operator
+     * Can optionally take a name that will be set to the current property name
+     */
+    protected function assign($name = null)
+    {
+        if ($name) {
+            $this->currentProperty = $name;
+        }
+        return $this->literal(':') || $this->literal('=');
+    }
+
+    // consume a keyword
+    protected function keyword(&$word)
+    {
+        $m = array();
+        if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m)) {
+            $word = $m[1];
+            return true;
+        }
+        return false;
+    }
+
+    // consume an end of statement delimiter
+    protected function end()
+    {
+        if ($this->literal(';', false)) {
+            return true;
+        } elseif ($this->count == strlen($this->buffer) || $this->buffer[$this->count] == '}') {
+            // if there is end of file or a closing block next then we don't need a ;
+            return true;
+        }
+        return false;
+    }
+
+    protected function guards(&$guards)
+    {
+        $g = null;
+
+        $s = $this->seek();
+
+        if (!$this->literal("when")) {
+            $this->seek($s);
+            return false;
+        }
+
+        $guards = array();
+
+        while ($this->guardGroup($g)) {
+            $guards[] = $g;
+            if (!$this->literal(",")) {
+                break;
+            }
+        }
+
+        if (count($guards) == 0) {
+            $guards = null;
+            $this->seek($s);
+            return false;
+        }
+
+        return true;
+    }
+
+    // a bunch of guards that are and'd together
+    // TODO rename to guardGroup
+    protected function guardGroup(&$guardGroup)
+    {
+        $guard = null;
+
+        $s = $this->seek();
+        $guardGroup = array();
+        while ($this->guard($guard)) {
+            $guardGroup[] = $guard;
+            if (!$this->literal("and")) {
+                break;
+            }
+        }
+
+        if (count($guardGroup) == 0) {
+            $guardGroup = null;
+            $this->seek($s);
+            return false;
+        }
+
+        return true;
+    }
+
+    protected function guard(&$guard)
+    {
+        $exp = null;
+
+        $s = $this->seek();
+        $negate = $this->literal("not");
+
+        if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) {
+            $guard = $exp;
+            if ($negate) {
+                $guard = array("negate", $guard);
+            }
+            return true;
+        }
+
+        $this->seek($s);
+        return false;
+    }
+
+    /* raw parsing functions */
+
+    protected function literal($what, $eatWhitespace = null)
+    {
+        if ($eatWhitespace === null) {
+            $eatWhitespace = $this->eatWhiteDefault;
+        }
+
+        // shortcut on single letter
+        if (!isset($what[1]) && isset($this->buffer[$this->count])) {
+            if ($this->buffer[$this->count] == $what) {
+                if (!$eatWhitespace) {
+                    $this->count++;
+                    return true;
+                }
+            // goes below...
+            } else {
+                return false;
+            }
+        }
+
+        if (!isset(self::$literalCache[$what])) {
+            self::$literalCache[$what] = Lessc::preg_quote($what);
+        }
+
+        $m = array();
+        return $this->match(self::$literalCache[$what], $m, $eatWhitespace);
+    }
+
+    protected function genericList(&$out, $parseItem, $delim = "", $flatten = true)
+    {
+        $value = null;
+
+        $s = $this->seek();
+        $items = array();
+        while ($this->$parseItem($value)) {
+            $items[] = $value;
+            if ($delim) {
+                if (!$this->literal($delim)) {
+                    break;
+                }
+            }
+        }
+
+        if (count($items) == 0) {
+            $this->seek($s);
+            return false;
+        }
+
+        if ($flatten && count($items) == 1) {
+            $out = $items[0];
+        } else {
+            $out = array("list", $delim, $items);
+        }
+
+        return true;
+    }
+
+
+    // advance counter to next occurrence of $what
+    // $until - don't include $what in advance
+    // $allowNewline, if string, will be used as valid char set
+    protected function to($what, &$out, $until = false, $allowNewline = false)
+    {
+        if (is_string($allowNewline)) {
+            $validChars = $allowNewline;
+        } else {
+            $validChars = $allowNewline ? "." : "[^\n]";
+        }
+        $m = array();
+        if (!$this->match('('.$validChars.'*?)'.Lessc::preg_quote($what), $m, !$until)) {
+            return false;
+        }
+        if ($until) {
+            $this->count -= strlen($what); // give back $what
+        }
+        $out = $m[1];
+        return true;
+    }
+
+    // try to match something on head of buffer
+    protected function match($regex, &$out, $eatWhitespace = null)
+    {
+        if ($eatWhitespace === null) {
+            $eatWhitespace = $this->eatWhiteDefault;
+        }
+
+        $r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais';
+        if (preg_match($r, $this->buffer, $out, 0, $this->count)) {
+            $this->count += strlen($out[0]);
+            if ($eatWhitespace && $this->writeComments) {
+                $this->whitespace();
+            }
+            return true;
+        }
+        return false;
+    }
+
+    // match some whitespace
+    protected function whitespace()
+    {
+        if ($this->writeComments) {
+            $gotWhite = false;
+            $m = array();
+            while (preg_match(self::$whitePattern, $this->buffer, $m, 0, $this->count)) {
+                if (isset($m[1]) && empty($this->seenComments[$this->count])) {
+                    $this->append(array("comment", $m[1]));
+                    $this->seenComments[$this->count] = true;
+                }
+                $this->count += strlen($m[0]);
+                $gotWhite = true;
+            }
+            return $gotWhite;
+        } else {
+            $this->match("", $m);
+            return strlen($m[0]) > 0;
+        }
+    }
+
+    // match something without consuming it
+    protected function peek($regex, &$out = null, $from = null)
+    {
+        if (is_null($from)) {
+            $from = $this->count;
+        }
+        $r = '/'.$regex.'/Ais';
+        $result = preg_match($r, $this->buffer, $out, 0, $from);
+
+        return $result;
+    }
+
+    // seek to a spot in the buffer or return where we are on no argument
+    protected function seek($where = null)
+    {
+        if ($where === null) {
+            return $this->count;
+        } else {
+            $this->count = $where;
+        }
+        return true;
+    }
+
+    /* misc functions */
+
+    public function throwError($msg = "parse error", $count = null)
+    {
+        $count = is_null($count) ? $this->count : $count;
+
+        $line = $this->line +
+            substr_count(substr($this->buffer, 0, $count), "\n");
+
+        if (!empty($this->sourceName)) {
+            $loc = "$this->sourceName on line $line";
+        } else {
+            $loc = "line: $line";
+        }
+
+        // TODO this depends on $this->count
+        $m = array();
+        if ($this->peek("(.*?)(\n|$)", $m, $count)) {
+            throw new exception("$msg: failed at `$m[1]` $loc");
+        } else {
+            throw new exception("$msg: $loc");
+        }
+    }
+
+    protected function pushBlock($selectors = null, $type = null)
+    {
+        $b = new stdclass();
+        $b->parent = $this->env;
+
+        $b->type = $type;
+        $b->id = self::$nextBlockId++;
+
+        $b->isVararg = false; // TODO: kill me from here
+        $b->tags = $selectors;
+
+        $b->props = array();
+        $b->children = array();
+
+        $this->env = $b;
+        return $b;
+    }
+
+    // push a block that doesn't multiply tags
+    protected function pushSpecialBlock($type)
+    {
+        return $this->pushBlock(null, $type);
+    }
+
+    // append a property to the current block
+    protected function append($prop, $pos = null)
+    {
+        if ($pos !== null) {
+            $prop[-1] = $pos;
+        }
+        $this->env->props[] = $prop;
+    }
+
+    // pop something off the stack
+    protected function pop()
+    {
+        $old = $this->env;
+        $this->env = $this->env->parent;
+        return $old;
+    }
+
+    // remove comments from $text
+    // todo: make it work for all functions, not just url
+    protected function removeComments($text)
+    {
+        $look = array(
+            'url(', '//', '/*', '"', "'"
+        );
+
+        $out = '';
+        $min = null;
+        while (true) {
+            // find the next item
+            foreach ($look as $token) {
+                $pos = strpos($text, $token);
+                if ($pos !== false) {
+                    if (!isset($min) || $pos < $min[1]) {
+                        $min = array($token, $pos);
+                    }
+                }
+            }
+
+            if (is_null($min)) {
+                break;
+            }
+
+            $count = $min[1];
+            $skip = 0;
+            $newlines = 0;
+            switch ($min[0]) {
+                case 'url(':
+                    $m = array();
+                    if (preg_match('/url\(.*?\)/', $text, $m, 0, $count)) {
+                        $count += strlen($m[0]) - strlen($min[0]);
+                    }
+                    break;
+                case '"':
+                case "'":
+                    $m = array();
+                    if (preg_match('/'.$min[0].'.*?(?<!\\\\)'.$min[0].'/', $text, $m, 0, $count)) {
+                        $count += strlen($m[0]) - 1;
+                    }
+                    break;
+                case '//':
+                    $skip = strpos($text, "\n", $count);
+                    if ($skip === false) {
+                        $skip = strlen($text) - $count;
+                    } else {
+                        $skip -= $count;
+                    }
+                    break;
+                case '/*':
+                    $m = array();
+                    if (preg_match('/\/\*.*?\*\//s', $text, $m, 0, $count)) {
+                        $skip = strlen($m[0]);
+                        $newlines = substr_count($m[0], "\n");
+                    }
+                    break;
+            }
+
+            if ($skip == 0) {
+                $count += strlen($min[0]);
+            }
+
+            $out .= substr($text, 0, $count).str_repeat("\n", $newlines);
+            $text = substr($text, $count + $skip);
+
+            $min = null;
+        }
+
+        return $out.$text;
+    }
 }
 
 class lessc_formatter_classic
 {
-	public $indentChar = "  ";
-
-	public $break = "\n";
-	public $open = " {";
-	public $close = "}";
-	public $selectorSeparator = ", ";
-	public $assignSeparator = ":";
-
-	public $openSingle = " { ";
-	public $closeSingle = " }";
-
-	public $disableSingle = false;
-	public $breakSelectors = false;
-
-	public $compressColors = false;
-	public $indentLevel;
-
-	public function __construct()
-	{
-		$this->indentLevel = 0;
-	}
-
-	public function indentStr($n = 0)
-	{
-		return str_repeat($this->indentChar, max($this->indentLevel + $n, 0));
-	}
-
-	public function property($name, $value)
-	{
-		return $name.$this->assignSeparator.$value.";";
-	}
-
-	protected function isEmpty($block)
-	{
-		if (empty($block->lines)) {
-			foreach ($block->children as $child) {
-				if (!$this->isEmpty($child)) {
-					return false;
-				}
-			}
-
-			return true;
-		}
-		return false;
-	}
-
-	public function block($block)
-	{
-		if ($this->isEmpty($block)) {
-			return;
-		}
-
-		$inner = $pre = $this->indentStr();
-
-		$isSingle = !$this->disableSingle &&
-			is_null($block->type) && count($block->lines) == 1;
-
-		if (!empty($block->selectors)) {
-			$this->indentLevel++;
-
-			if ($this->breakSelectors) {
-				$selectorSeparator = $this->selectorSeparator.$this->break.$pre;
-			} else {
-				$selectorSeparator = $this->selectorSeparator;
-			}
-
-			echo $pre.
-				implode($selectorSeparator, $block->selectors);
-			if ($isSingle) {
-				echo $this->openSingle;
-				$inner = "";
-			} else {
-				echo $this->open.$this->break;
-				$inner = $this->indentStr();
-			}
-		}
-
-		if (!empty($block->lines)) {
-			$glue = $this->break.$inner;
-			echo $inner.implode($glue, $block->lines);
-			if (!$isSingle && !empty($block->children)) {
-				echo $this->break;
-			}
-		}
-
-		foreach ($block->children as $child) {
-			$this->block($child);
-		}
-
-		if (!empty($block->selectors)) {
-			if (!$isSingle && empty($block->children)) {
-				echo $this->break;
-			}
-
-			if ($isSingle) {
-				echo $this->closeSingle.$this->break;
-			} else {
-				echo $pre.$this->close.$this->break;
-			}
-
-			$this->indentLevel--;
-		}
-	}
+    public $indentChar = "  ";
+
+    public $break = "\n";
+    public $open = " {";
+    public $close = "}";
+    public $selectorSeparator = ", ";
+    public $assignSeparator = ":";
+
+    public $openSingle = " { ";
+    public $closeSingle = " }";
+
+    public $disableSingle = false;
+    public $breakSelectors = false;
+
+    public $compressColors = false;
+    public $indentLevel;
+
+    public function __construct()
+    {
+        $this->indentLevel = 0;
+    }
+
+    public function indentStr($n = 0)
+    {
+        return str_repeat($this->indentChar, max($this->indentLevel + $n, 0));
+    }
+
+    public function property($name, $value)
+    {
+        return $name.$this->assignSeparator.$value.";";
+    }
+
+    protected function isEmpty($block)
+    {
+        if (empty($block->lines)) {
+            foreach ($block->children as $child) {
+                if (!$this->isEmpty($child)) {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+        return false;
+    }
+
+    public function block($block)
+    {
+        if ($this->isEmpty($block)) {
+            return;
+        }
+
+        $inner = $pre = $this->indentStr();
+
+        $isSingle = !$this->disableSingle &&
+            is_null($block->type) && count($block->lines) == 1;
+
+        if (!empty($block->selectors)) {
+            $this->indentLevel++;
+
+            if ($this->breakSelectors) {
+                $selectorSeparator = $this->selectorSeparator.$this->break.$pre;
+            } else {
+                $selectorSeparator = $this->selectorSeparator;
+            }
+
+            echo $pre.
+                implode($selectorSeparator, $block->selectors);
+            if ($isSingle) {
+                echo $this->openSingle;
+                $inner = "";
+            } else {
+                echo $this->open.$this->break;
+                $inner = $this->indentStr();
+            }
+        }
+
+        if (!empty($block->lines)) {
+            $glue = $this->break.$inner;
+            echo $inner.implode($glue, $block->lines);
+            if (!$isSingle && !empty($block->children)) {
+                echo $this->break;
+            }
+        }
+
+        foreach ($block->children as $child) {
+            $this->block($child);
+        }
+
+        if (!empty($block->selectors)) {
+            if (!$isSingle && empty($block->children)) {
+                echo $this->break;
+            }
+
+            if ($isSingle) {
+                echo $this->closeSingle.$this->break;
+            } else {
+                echo $pre.$this->close.$this->break;
+            }
+
+            $this->indentLevel--;
+        }
+    }
 }
 
 /**
@@ -4372,17 +4372,17 @@ 
  */
 class lessc_formatter_compressed extends lessc_formatter_classic
 {
-	public $disableSingle = true;
-	public $open = "{";
-	public $selectorSeparator = ",";
-	public $assignSeparator = ":";
-	public $break = "";
-	public $compressColors = true;
-
-	public function indentStr($n = 0)
-	{
-		return "";
-	}
+    public $disableSingle = true;
+    public $open = "{";
+    public $selectorSeparator = ",";
+    public $assignSeparator = ":";
+    public $break = "";
+    public $compressColors = true;
+
+    public function indentStr($n = 0)
+    {
+        return "";
+    }
 }
 
 /**
@@ -4390,8 +4390,8 @@ 
  */
 class lessc_formatter_lessjs extends lessc_formatter_classic
 {
-	public $disableSingle = true;
-	public $breakSelectors = true;
-	public $assignSeparator = ": ";
-	public $selectorSeparator = ",";
+    public $disableSingle = true;
+    public $breakSelectors = true;
+    public $assignSeparator = ": ";
+    public $selectorSeparator = ",";
 }

Spacing +59 added lines, -59 removed lines

@@ -79,8 +79,8 @@ 
 	protected function findImport($url)
 	{
 		foreach ((array) $this->importDir as $dir) {
-			$full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url;
-			if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) {
+			$full = $dir . (substr($dir, -1) != '/' ? '/' : '') . $url;
+			if ($this->fileExists($file = $full . '.less') || $this->fileExists($file = $full)) {
 				return $file;
 			}
 		}
@@ -231,9 +231,9 @@ 
 				$this->compileMedia($block);
 				break;
 			case "directive":
-				$name = "@".$block->name;
+				$name = "@" . $block->name;
 				if (!empty($block->value)) {
-					$name .= " ".$this->compileValue($this->reduce($block->value));
+					$name .= " " . $this->compileValue($this->reduce($block->value));
 				}
 
 				$this->compileNestedBlock($block, array($name));
@@ -405,8 +405,8 @@ 
 						break;
 					case "mediaExp":
 						if (isset($q[2])) {
-							$parts[] = "($q[1]: ".
-								$this->compileValue($this->reduce($q[2])).")";
+							$parts[] = "($q[1]: " .
+								$this->compileValue($this->reduce($q[2])) . ")";
 						} else {
 							$parts[] = "($q[1])";
 						}
@@ -424,7 +424,7 @@ 
 
 		$out = "@media";
 		if (!empty($parts)) {
-			$out .= " ".
+			$out .= " " .
 				implode($this->formatter->selectorSeparator, $compiledQueries);
 		}
 		return $out;
@@ -511,7 +511,7 @@ 
 				if ($count > 0) {
 					$out[] = trim($child);
 				} else {
-					$out[] = trim($parent.' '.$child);
+					$out[] = trim($parent . ' ' . $child);
 				}
 			}
 		}
@@ -716,7 +716,7 @@ 
 					$value = $a[2];
 				} else {
 					$value = null; // :(
-					$this->throwError("Failed to assign arg ".$a[1]); // This ends function by throwing an exception
+					$this->throwError("Failed to assign arg " . $a[1]); // This ends function by throwing an exception
 				}
 
 				$value = $this->reduce($value);
@@ -781,7 +781,7 @@ 
 							$orderedArgs[] = $this->reduce($arg[1]);
 							break;
 						default:
-							$this->throwError("Unknown arg type: ".$arg[0]);
+							$this->throwError("Unknown arg type: " . $arg[0]);
 					}
 				}
 
@@ -846,7 +846,7 @@ 
 				break;
 			case "directive":
 				list(, $name, $value) = $prop;
-				$out->lines[] = "@$name ".$this->compileValue($this->reduce($value)).';';
+				$out->lines[] = "@$name " . $this->compileValue($this->reduce($value)) . ';';
 				break;
 			case "comment":
 				$out->lines[] = $prop[1];
@@ -862,7 +862,7 @@ 
 				$result = $this->tryImport($importPath, $block, $out);
 
 				$this->env->imports[$importId] = $result === false ?
-					array(false, "@import ".$this->compileValue($importPath).";") : $result;
+					array(false, "@import " . $this->compileValue($importPath) . ";") : $result;
 
 				break;
 			case "import_mixin":
@@ -917,7 +917,7 @@ 
 				if ($this->numberPrecision !== null) {
 					$num = round($num, $this->numberPrecision);
 				}
-				return $num.$unit;
+				return $num . $unit;
 			case 'string':
 				// [1] - contents of string (includes quotes)
 				list(, $delim, $content) = $value;
@@ -926,7 +926,7 @@ 
 						$part = $this->compileValue($part);
 					}
 				}
-				return $delim.implode($content).$delim;
+				return $delim . implode($content) . $delim;
 			case 'color':
 				// [1] - red component (either number or a %)
 				// [2] - green component
@@ -938,7 +938,7 @@ 
 				$b = round($b);
 
 				if (count($value) == 5 && $value[4] != 1) { // rgba
-					return 'rgba('.$r.','.$g.','.$b.','.$value[4].')';
+					return 'rgba(' . $r . ',' . $g . ',' . $b . ',' . $value[4] . ')';
 				}
 
 				$h = sprintf("#%02x%02x%02x", $r, $g, $b);
@@ -946,7 +946,7 @@ 
 				if (!empty($this->formatter->compressColors)) {
 					// Converting hex color to short notation (e.g. #003399 to #039)
 					if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) {
-						$h = '#'.$h[1].$h[3].$h[5];
+						$h = '#' . $h[1] . $h[3] . $h[5];
 					}
 				}
 
@@ -954,7 +954,7 @@ 
 
 			case 'function':
 				list(, $name, $args) = $value;
-				return $name.'('.$this->compileValue($args).')';
+				return $name . '(' . $this->compileValue($args) . ')';
 			default: // assumed to be unit
 				$this->throwError("unknown value type: $value[0]");
 		}
@@ -1119,7 +1119,7 @@ 
 			}
 		}
 
-		return 'url("'.$url.'")';
+		return 'url("' . $url . '")';
 	}
 
 	// utility func to unquote a string
@@ -1167,7 +1167,7 @@ 
 				$i++;
 				$rep = $this->compileValue($this->lib_e($val));
 				$template = preg_replace(
-					'/'.self::preg_quote($match).'/',
+					'/' . self::preg_quote($match) . '/',
 					$rep,
 					$template,
 					1
@@ -1520,7 +1520,7 @@ 
 			$numValues = count($values);
 			if ($expectedArgs != $numValues) {
 				if ($name) {
-					$name = $name.": ";
+					$name = $name . ": ";
 				}
 
 				$this->throwError("{$name}expecting $expectedArgs arguments, got $numValues");
@@ -1712,7 +1712,7 @@ 
 			case "interpolate":
 				$reduced = $this->reduce($value[1]);
 				$var = $this->compileValue($reduced);
-				$res = $this->reduce(array("variable", $this->vPrefix.$var));
+				$res = $this->reduce(array("variable", $this->vPrefix . $var));
 
 				if ($res[0] == "raw_color") {
 					$res = $this->coerceColor($res);
@@ -1727,7 +1727,7 @@ 
 				$key = $value[1];
 				if (is_array($key)) {
 					$key = $this->reduce($key);
-					$key = $this->vPrefix.$this->compileValue($this->lib_e($key));
+					$key = $this->vPrefix . $this->compileValue($this->lib_e($key));
 				}
 
 				$seen = & $this->env->seenNames;
@@ -1773,7 +1773,7 @@ 
 				}
 
 				$f = isset($this->libFunctions[$name]) ?
-					$this->libFunctions[$name] : array($this, 'lib_'.str_replace('-', '_', $name));
+					$this->libFunctions[$name] : array($this, 'lib_' . str_replace('-', '_', $name));
 
 				if (is_callable($f)) {
 					if ($args[0] == 'list') {
@@ -1849,7 +1849,7 @@ 
 					$t = intval($num) % $width;
 					$num /= $width;
 
-					$c[$i] = $t * (256 / $width) + $t * floor(16/$width);
+					$c[$i] = $t * (256 / $width) + $t * floor(16 / $width);
 				}
 
 				return $c;
@@ -1938,7 +1938,7 @@ 
 		// make the expression look it did before being parsed
 		$paddedOp = $op;
 		if ($whiteBefore) {
-			$paddedOp = " ".$paddedOp;
+			$paddedOp = " " . $paddedOp;
 		}
 		if ($whiteAfter) {
 			$paddedOp .= " ";
@@ -2028,7 +2028,7 @@ 
 					$out[] = $lval / $rval;
 					break;
 				default:
-					$this->throwError('evaluate error: color op number failed on op '.$op);
+					$this->throwError('evaluate error: color op number failed on op ' . $op);
 			}
 		}
 		return $this->fixColor($out);
@@ -2099,7 +2099,7 @@ 
 			case '=<':
 				return $this->toBool($left[1] <= $right[1]);
 			default:
-				$this->throwError('parse error: unknown number operator: '.$op);
+				$this->throwError('parse error: unknown number operator: ' . $op);
 		}
 
 		return array("number", $value, $unit);
@@ -2151,7 +2151,7 @@ 
 	{
 		$current = $this->env;
 
-		$isArguments = $name == $this->vPrefix.'arguments';
+		$isArguments = $name == $this->vPrefix . 'arguments';
 		while ($current) {
 			if ($isArguments && isset($current->arguments)) {
 				return array('list', ' ', $current->arguments);
@@ -2176,7 +2176,7 @@ 
 		$value = null;
 		foreach ($args as $name => $strValue) {
 			if ($name[0] !== '@') {
-				$name = '@'.$name;
+				$name = '@' . $name;
 			}
 			$parser->count = 0;
 			$parser->buffer = (string) $strValue;
@@ -2230,7 +2230,7 @@ 
 	public function compileFile($fname, $outFname = null)
 	{
 		if (!is_readable($fname)) {
-			throw new Exception('load error: failed to find '.$fname);
+			throw new Exception('load error: failed to find ' . $fname);
 		}
 
 		$pi = pathinfo($fname);
@@ -2238,7 +2238,7 @@ 
 		$oldImport = $this->importDir;
 
 		$this->importDir = (array) $this->importDir;
-		$this->importDir[] = $pi['dirname'].'/';
+		$this->importDir[] = $pi['dirname'] . '/';
 
 		$this->addParsedFile($fname);
 
@@ -2684,17 +2684,17 @@ 
 
 		if (!self::$operatorString) {
 			self::$operatorString =
-				'('.implode('|', array_map(
+				'(' . implode('|', array_map(
 					array('lessc', 'preg_quote'),
 					array_keys(self::$precedence)
-				)).')';
+				)) . ')';
 
 			$commentSingle = Lessc::preg_quote(self::$commentSingle);
 			$commentMultiLeft = Lessc::preg_quote(self::$commentMultiLeft);
 			$commentMultiRight = Lessc::preg_quote(self::$commentMultiRight);
 
-			self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight;
-			self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais';
+			self::$commentMulti = $commentMultiLeft . '.*?' . $commentMultiRight;
+			self::$whitePattern = '/' . $commentSingle . '[^\n]*\s*|(' . self::$commentMulti . ')\s*|\s+/Ais';
 		}
 	}
 
@@ -2727,7 +2727,7 @@ 
 		while (false !== $this->parseChunk());
 
 		if ($this->count != strlen($this->buffer)) {
-			$this->throwError('parse error count '.$this->count.' != len buffer '.strlen($this->buffer));
+			$this->throwError('parse error count ' . $this->count . ' != len buffer ' . strlen($this->buffer));
 
 		}
 
@@ -2934,7 +2934,7 @@ 
 		// mixin
 		if ($this->mixinTags($tags) &&
 			$this->argumentDef($argv, $isVararg) &&
-			$this->keyword($suffix)  && $this->end()
+			$this->keyword($suffix) && $this->end()
 		) {
 			$tags = $this->fixTags($tags);
 			$this->append(array('mixin', $tags, $argv, $suffix), $s);
@@ -2958,7 +2958,7 @@ 
 			"|",
 			array_map(array("lessc", "preg_quote"), $directives)
 		);
-		$pattern = '/^(-[a-z-]+-)?('.$pattern.')$/i';
+		$pattern = '/^(-[a-z-]+-)?(' . $pattern . ')$/i';
 
 		return preg_match($pattern, $dirname);
 	}
@@ -3042,7 +3042,7 @@ 
 			$needWhite = $whiteBefore && !$this->inParens;
 
 			$m = array();
-			if ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) {
+			if ($this->match(self::$operatorString . ($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) {
 				if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) {
 					foreach (self::$supressDivisionProps as $pattern) {
 						if (preg_match($pattern, $this->env->currentProperty)) {
@@ -3204,7 +3204,7 @@ 
 		// css hack: \0
 		$m = array();
 		if ($this->literal('\\') && $this->match('([0-9]+)', $m)) {
-			$value = array('keyword', '\\'.$m[1]);
+			$value = array('keyword', '\\' . $m[1]);
 			return true;
 		} else {
 			$this->seek($s);
@@ -3328,7 +3328,7 @@ 
 			$stop = array_merge($stop, $rejectStrs);
 		}
 
-		$patt = '(.*?)('.implode("|", $stop).')';
+		$patt = '(.*?)(' . implode("|", $stop) . ')';
 
 		$nestingLevel = 0;
 
@@ -3402,8 +3402,8 @@ 
 		$content = array();
 
 		// look for either ending delim , escape, or string interpolation
-		$patt = '([^\n]*?)(@\{|\\\\|'.
-			Lessc::preg_quote($delim).')';
+		$patt = '([^\n]*?)(@\{|\\\\|' .
+			Lessc::preg_quote($delim) . ')';
 
 		$oldWhite = $this->eatWhiteDefault;
 		$this->eatWhiteDefault = false;
@@ -3750,7 +3750,7 @@ 
 
 		while (true) {
 			$m = array();
-			if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) {
+			if ($this->match('([' . $chars . '0-9][' . $chars . ']*)', $m)) {
 				$parts[] = $m[1];
 				if ($simple) {
 					break;
@@ -3863,7 +3863,7 @@ 
 			if (!empty($sub)) {
 				$name = array('variable', $sub);
 			} else {
-				$name = $this->lessc->vPrefix.$name;
+				$name = $this->lessc->vPrefix . $name;
 			}
 			return true;
 		}
@@ -4050,7 +4050,7 @@ 
 			$validChars = $allowNewline ? "." : "[^\n]";
 		}
 		$m = array();
-		if (!$this->match('('.$validChars.'*?)'.Lessc::preg_quote($what), $m, !$until)) {
+		if (!$this->match('(' . $validChars . '*?)' . Lessc::preg_quote($what), $m, !$until)) {
 			return false;
 		}
 		if ($until) {
@@ -4067,7 +4067,7 @@ 
 			$eatWhitespace = $this->eatWhiteDefault;
 		}
 
-		$r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais';
+		$r = '/' . $regex . ($eatWhitespace && !$this->writeComments ? '\s*' : '') . '/Ais';
 		if (preg_match($r, $this->buffer, $out, 0, $this->count)) {
 			$this->count += strlen($out[0]);
 			if ($eatWhitespace && $this->writeComments) {
@@ -4105,7 +4105,7 @@ 
 		if (is_null($from)) {
 			$from = $this->count;
 		}
-		$r = '/'.$regex.'/Ais';
+		$r = '/' . $regex . '/Ais';
 		$result = preg_match($r, $this->buffer, $out, 0, $from);
 
 		return $result;
@@ -4225,7 +4225,7 @@ 
 				case '"':
 				case "'":
 					$m = array();
-					if (preg_match('/'.$min[0].'.*?(?<!\\\\)'.$min[0].'/', $text, $m, 0, $count)) {
+					if (preg_match('/' . $min[0] . '.*?(?<!\\\\)' . $min[0] . '/', $text, $m, 0, $count)) {
 						$count += strlen($m[0]) - 1;
 					}
 					break;
@@ -4250,13 +4250,13 @@ 
 				$count += strlen($min[0]);
 			}
 
-			$out .= substr($text, 0, $count).str_repeat("\n", $newlines);
+			$out .= substr($text, 0, $count) . str_repeat("\n", $newlines);
 			$text = substr($text, $count + $skip);
 
 			$min = null;
 		}
 
-		return $out.$text;
+		return $out . $text;
 	}
 }
 
@@ -4291,7 +4291,7 @@ 
 
 	public function property($name, $value)
 	{
-		return $name.$this->assignSeparator.$value.";";
+		return $name . $this->assignSeparator . $value . ";";
 	}
 
 	protected function isEmpty($block)
@@ -4323,25 +4323,25 @@ 
 			$this->indentLevel++;
 
 			if ($this->breakSelectors) {
-				$selectorSeparator = $this->selectorSeparator.$this->break.$pre;
+				$selectorSeparator = $this->selectorSeparator . $this->break . $pre;
 			} else {
 				$selectorSeparator = $this->selectorSeparator;
 			}
 
-			echo $pre.
+			echo $pre .
 				implode($selectorSeparator, $block->selectors);
 			if ($isSingle) {
 				echo $this->openSingle;
 				$inner = "";
 			} else {
-				echo $this->open.$this->break;
+				echo $this->open . $this->break;
 				$inner = $this->indentStr();
 			}
 		}
 
 		if (!empty($block->lines)) {
-			$glue = $this->break.$inner;
-			echo $inner.implode($glue, $block->lines);
+			$glue = $this->break . $inner;
+			echo $inner . implode($glue, $block->lines);
 			if (!$isSingle && !empty($block->children)) {
 				echo $this->break;
 			}
@@ -4357,9 +4357,9 @@ 
 			}
 
 			if ($isSingle) {
-				echo $this->closeSingle.$this->break;
+				echo $this->closeSingle . $this->break;
 			} else {
-				echo $pre.$this->close.$this->break;
+				echo $pre . $this->close . $this->break;
 			}
 
 			$this->indentLevel--;

htdocs/index_dol.php

Braces +9 added lines, -3 removed lines

@@ -44,9 +44,15 @@
  */
 
 $nbmodulesnotautoenabled = count($conf->modules);
-if (in_array('fckeditor', $conf->modules)) $nbmodulesnotautoenabled--;
-if (in_array('export', $conf->modules)) $nbmodulesnotautoenabled--;
-if (in_array('import', $conf->modules)) $nbmodulesnotautoenabled--;
+if (in_array('fckeditor', $conf->modules)) {
+    $nbmodulesnotautoenabled--;
+}
+if (in_array('export', $conf->modules)) {
+    $nbmodulesnotautoenabled--;
+}
+if (in_array('import', $conf->modules)) {
+    $nbmodulesnotautoenabled--;
+}
 
 // Check if company name is defined (first install)
 if (!isset($conf->global->MAIN_INFO_SOCIETE_NOM) || !getDolGlobalString('MAIN_INFO_SOCIETE_NOM')) {

Spacing +11 added lines, -11 removed lines

@@ -197,7 +197,7 @@ 
     }
 
     // Number of supplier proposals open (expired)
-    if (isModEnabled('supplier_proposal')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_SUPPLIER') && $user->hasRight('supplier_proposal', 'lire')) {
+    if (isModEnabled('supplier_proposal') && !getDolGlobalString('MAIN_DISABLE_BLOCK_SUPPLIER') && $user->hasRight('supplier_proposal', 'lire')) {
         $langs->load("supplier_proposal");
         include_once DOL_DOCUMENT_ROOT . '/supplier_proposal/class/supplier_proposal.class.php';
         $board = new SupplierProposal($db);
@@ -207,7 +207,7 @@ 
     }
 
     // Number of sales orders
-    if (isModEnabled('order')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_CUSTOMER') && $user->hasRight('commande', 'lire')) {
+    if (isModEnabled('order') && !getDolGlobalString('MAIN_DISABLE_BLOCK_CUSTOMER') && $user->hasRight('commande', 'lire')) {
         include_once DOL_DOCUMENT_ROOT . '/commande/class/commande.class.php';
         $board = new Commande($db);
         // Number of customer orders to be shipped (validated and in progress)
@@ -221,7 +221,7 @@ 
     }
 
     // Number of suppliers orders
-    if (isModEnabled('supplier_order')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_SUPPLIER') && $user->hasRight('fournisseur', 'commande', 'lire')) {
+    if (isModEnabled('supplier_order') && !getDolGlobalString('MAIN_DISABLE_BLOCK_SUPPLIER') && $user->hasRight('fournisseur', 'commande', 'lire')) {
         include_once DOL_DOCUMENT_ROOT . '/fourn/class/fournisseur.commande.class.php';
         $board = new CommandeFournisseur($db);
         $dashboardlines[$board->element . '_opened'] = $board->load_board($user, "opened");
@@ -229,7 +229,7 @@ 
     }
 
     // Number of contract / services enabled (delayed)
-    if (isModEnabled('contract')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_CONTRACT') && $user->hasRight('contrat', 'lire')) {
+    if (isModEnabled('contract') && !getDolGlobalString('MAIN_DISABLE_BLOCK_CONTRACT') && $user->hasRight('contrat', 'lire')) {
         include_once DOL_DOCUMENT_ROOT . '/contrat/class/contrat.class.php';
         $board = new Contrat($db);
         $dashboardlines[$board->element . '_inactive'] = $board->load_board($user, "inactive");
@@ -238,7 +238,7 @@ 
     }
 
     // Number of tickets open
-    if (isModEnabled('ticket')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_TICKET') && $user->hasRight('ticket', 'read')) {
+    if (isModEnabled('ticket') && !getDolGlobalString('MAIN_DISABLE_BLOCK_TICKET') && $user->hasRight('ticket', 'read')) {
         include_once DOL_DOCUMENT_ROOT . '/ticket/class/ticket.class.php';
         $board = new Ticket($db);
         $dashboardlines[$board->element . '_opened'] = $board->load_board($user, "opened");
@@ -261,7 +261,7 @@ 
     }
 
     // Number of transactions to conciliate
-    if (isModEnabled('bank')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_BANK') && $user->hasRight('banque', 'lire') && !$user->socid) {
+    if (isModEnabled('bank') && !getDolGlobalString('MAIN_DISABLE_BLOCK_BANK') && $user->hasRight('banque', 'lire') && !$user->socid) {
         include_once DOL_DOCUMENT_ROOT . '/compta/bank/class/account.class.php';
         $board = new Account($db);
         $nb = $board->countAccountToReconcile(); // Get nb of account to reconciliate
@@ -272,7 +272,7 @@ 
 
 
     // Number of cheque to send
-    if (isModEnabled('bank')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_BANK') && $user->hasRight('banque', 'lire') && !$user->socid) {
+    if (isModEnabled('bank') && !getDolGlobalString('MAIN_DISABLE_BLOCK_BANK') && $user->hasRight('banque', 'lire') && !$user->socid) {
         if (!getDolGlobalString('BANK_DISABLE_CHECK_DEPOSIT')) {
             include_once DOL_DOCUMENT_ROOT . '/compta/paiement/cheque/class/remisecheque.class.php';
             $board = new RemiseCheque($db);
@@ -291,7 +291,7 @@ 
     }
 
     // Number of foundation members
-    if (isModEnabled('member')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_ADHERENT') && $user->hasRight('adherent', 'lire') && !$user->socid) {
+    if (isModEnabled('member') && !getDolGlobalString('MAIN_DISABLE_BLOCK_ADHERENT') && $user->hasRight('adherent', 'lire') && !$user->socid) {
         include_once DOL_DOCUMENT_ROOT . '/adherents/class/adherent.class.php';
         $board = new Adherent($db);
         $dashboardlines[$board->element . '_shift'] = $board->load_board($user, 'shift');
@@ -299,21 +299,21 @@ 
     }
 
     // Number of expense reports to approve
-    if (isModEnabled('expensereport')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_EXPENSEREPORT') && $user->hasRight('expensereport', 'approve')) {
+    if (isModEnabled('expensereport') && !getDolGlobalString('MAIN_DISABLE_BLOCK_EXPENSEREPORT') && $user->hasRight('expensereport', 'approve')) {
         include_once DOL_DOCUMENT_ROOT . '/expensereport/class/expensereport.class.php';
         $board = new ExpenseReport($db);
         $dashboardlines[$board->element . '_toapprove'] = $board->load_board($user, 'toapprove');
     }
 
     // Number of expense reports to pay
-    if (isModEnabled('expensereport')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_EXPENSEREPORT') && $user->hasRight('expensereport', 'to_paid')) {
+    if (isModEnabled('expensereport') && !getDolGlobalString('MAIN_DISABLE_BLOCK_EXPENSEREPORT') && $user->hasRight('expensereport', 'to_paid')) {
         include_once DOL_DOCUMENT_ROOT . '/expensereport/class/expensereport.class.php';
         $board = new ExpenseReport($db);
         $dashboardlines[$board->element . '_topay'] = $board->load_board($user, 'topay');
     }
 
     // Number of holidays to approve
-    if (isModEnabled('holiday')  && !getDolGlobalString('MAIN_DISABLE_BLOCK_HOLIDAY') && $user->hasRight('holiday', 'approve')) {
+    if (isModEnabled('holiday') && !getDolGlobalString('MAIN_DISABLE_BLOCK_HOLIDAY') && $user->hasRight('holiday', 'approve')) {
         include_once DOL_DOCUMENT_ROOT . '/holiday/class/holiday.class.php';
         $board = new Holiday($db);
         $dashboardlines[$board->element] = $board->load_board($user);

htdocs/webhook/target_card.php

Spacing +1 added lines, -1 removed lines

@@ -43,7 +43,7 @@
 $contextpage = GETPOST('contextpage', 'aZ') ? GETPOST('contextpage', 'aZ') : 'targetcard'; // To manage different context of search
 $backtopage = GETPOST('backtopage', 'alpha');
 $backtopageforcancel = GETPOST('backtopageforcancel', 'alpha');
-$lineid   = GETPOSTINT('lineid');
+$lineid = GETPOSTINT('lineid');
 
 // Initialize technical objects
 $object = new Target($db);

htdocs/eventorganization/conferenceorboothattendee_card.php

Spacing +1 added lines, -1 removed lines

@@ -47,7 +47,7 @@
 $contextpage = GETPOST('contextpage', 'aZ') ? GETPOST('contextpage', 'aZ') : 'conferenceorboothattendeecard'; // To manage different context of search
 $backtopage = GETPOST('backtopage', 'alpha');
 $backtopageforcancel = GETPOST('backtopageforcancel', 'alpha');
-$lineid   = GETPOSTINT('lineid');
+$lineid = GETPOSTINT('lineid');
 $mode = GETPOST('mode', 'alpha');
 
 $conf_or_booth_id = GETPOSTINT('conforboothid');

htdocs/delivery/class/delivery.class.php

Indentation +10 added lines, -10 removed lines

@@ -271,7 +271,7 @@ 
         }
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      *  Create a line
      *
@@ -284,7 +284,7 @@ 
      */
     public function create_line($origin_id, $qty, $fk_product, $description, $array_options = [])
     {
-		// phpcs:enable
+        // phpcs:enable
         $error = 0;
         $idprod = $fk_product;
 
@@ -546,7 +546,7 @@ 
         }
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      *  Creating the delivery slip from an existing shipment
      *
@@ -556,7 +556,7 @@ 
      */
     public function create_from_sending($user, $sending_id)
     {
-		// phpcs:enable
+        // phpcs:enable
         global $conf;
 
         $expedition = new Expedition($this->db);
@@ -598,7 +598,7 @@ 
         return $this->create($user);
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      * Update a livraison line (only extrafields)
      *
@@ -608,7 +608,7 @@ 
      */
     public function update_line($id, $array_options = [])
     {
-		// phpcs:enable
+        // phpcs:enable
         global $conf;
         $error = 0;
 
@@ -840,7 +840,7 @@ 
         return $result;
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      *  Load lines insto $this->lines.
      *
@@ -848,7 +848,7 @@ 
      */
     public function fetch_lines()
     {
-		// phpcs:enable
+        // phpcs:enable
         $this->lines = array();
 
         $sql = "SELECT ld.rowid, ld.fk_product, ld.description, ld.subprice, ld.total_ht, ld.qty as qty_shipped, ld.fk_origin_line, ";
@@ -928,7 +928,7 @@ 
         return $this->LibStatut($this->statut, $mode);
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      *  Return the label of a given status
      *
@@ -938,7 +938,7 @@ 
      */
     public function LibStatut($status, $mode)
     {
-		// phpcs:enable
+        // phpcs:enable
         global $langs;
 
         if (empty($this->labelStatus) || empty($this->labelStatusShort)) {

htdocs/stripe/ajax/ajax.php

Indentation +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
- /*  Copyright (C) 2021     Thibault FOUCART    <support@ptibogxiv.net>
+    /*  Copyright (C) 2021     Thibault FOUCART    <support@ptibogxiv.net>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

Spacing +1 added lines, -1 removed lines

@@ -59,7 +59,7 @@
 }
 
 $usestripeterminals = getDolGlobalString('STRIPE_LOCATION');
-if (! $usestripeterminals) {
+if (!$usestripeterminals) {
     accessforbidden('Feature to use Stripe terminals not enabled');
 }
 

htdocs/opensurvey/class/opensurveysondage.class.php

Indentation +4 added lines, -4 removed lines

@@ -579,7 +579,7 @@ 
         return $result;
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      * Return array of lines
      *
@@ -587,7 +587,7 @@ 
      */
     public function fetch_lines()
     {
-		// phpcs:enable
+        // phpcs:enable
         $this->lines = array();
 
         $sql = "SELECT id_users, nom as name, reponses";
@@ -736,7 +736,7 @@ 
         return $this->LibStatut($this->status, $mode);
     }
 
-	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+    // phpcs:disable PEAR.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
     /**
      *  Return label of status
      *
@@ -746,7 +746,7 @@ 
      */
     public function LibStatut($status, $mode)
     {
-		// phpcs:enable
+        // phpcs:enable
         global $langs, $conf;
 
         if (empty($this->labelStatus) || empty($this->labelStatusShort)) {