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<?php |
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namespace Jade\Compiler; |
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/** |
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* Class Jade\Compiler\SubCodeHandler. |
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*/ |
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class SubCodeHandler |
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{ |
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protected $codeHandler; |
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protected $input; |
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protected $name; |
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public function __construct(CodeHandler $codeHandler, $input, $name) |
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{ |
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$this->codeHandler = $codeHandler; |
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$this->input = $input; |
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$this->name = $name; |
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} |
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public function getMiddleString() |
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{ |
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$input = $this->input; |
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return function ($start, $end) use ($input) { |
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$offset = $start[1] + strlen($start[0]); |
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return substr($input, $offset, isset($end) ? $end[1] - $offset : strlen($input)); |
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}; |
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} |
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public function handleRecursion(&$result) |
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{ |
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$getMiddleString = $this->getMiddleString(); |
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$codeHandler = $this->codeHandler; |
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return function ($arg, $name = '') use (&$result, $codeHandler, $getMiddleString) { |
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list($start, $end) = $arg; |
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$str = trim($getMiddleString($start, $end)); |
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if (!strlen($str)) { |
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return ''; |
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} |
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$innerCode = $codeHandler->innerCode($str, $name); |
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if (count($innerCode) > 1) { |
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$result = array_merge($result, array_slice($innerCode, 0, -1)); |
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return array_pop($innerCode); |
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} |
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return $innerCode[0]; |
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}; |
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} |
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protected function handleNestedExpression(&$result) |
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{ |
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$handleRecursion = $this->handleRecursion($result); |
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$name = $this->name; |
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return function (&$arguments, $start, $end) use ($name, $handleRecursion) { |
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if ($end !== false && $start[1] !== $end[1]) { |
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array_push( |
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$arguments, |
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$handleRecursion( |
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array($start, $end), |
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$name * 10 + count($arguments) |
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) |
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); |
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} |
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}; |
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} |
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protected function scanSeparators(&$separators, &$result) |
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{ |
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$handleNested = $this->handleNestedExpression($result); |
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return function (&$arguments, $open, $close) use (&$separators, $handleNested) { |
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$count = 1; |
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do { |
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$start = current($separators); |
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do { |
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$curr = next($separators); |
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if ($curr[0] === $open) { |
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$count++; |
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} |
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if ($curr[0] === $close) { |
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$count--; |
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} |
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} while ($curr[0] !== null && $count > 0 && $curr[0] !== ','); |
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$handleNested($arguments, $start, current($separators)); |
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} while ($curr !== false && $count > 0); |
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return $count; |
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}; |
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} |
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public function handleCodeInbetween(&$separators, &$result) |
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{ |
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$scanSeparators = $this->scanSeparators($separators, $result); |
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$input = $this->input; |
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return function () use (&$separators, $input, $scanSeparators) { |
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$arguments = array(); |
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$start = current($separators); |
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$endPair = array( |
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'[' => ']', |
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'{' => '}', |
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'(' => ')', |
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',' => false, |
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); |
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$open = $start[0]; |
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$close = $endPair[$start[0]]; |
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$count = $scanSeparators($arguments, $open, $close); |
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if ($close && $count > 0) { |
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throw new \ErrorException($input . "\nMissing closing: " . $close, 14); |
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} |
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if (($sep = current($separators)) !== false) { |
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$end = next($separators); |
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if ($end[0] === null && $sep[1] < $end[1]) { |
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$key = count($arguments) - 1; |
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$arguments[$key] .= substr($input, $sep[1] + 1, $end[1] - $sep[1] - 1); |
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} |
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} |
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return $arguments; |
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}; |
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} |
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public function getNext($separators) |
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{ |
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return function ($index) use ($separators) { |
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if (isset($separators[$index + 1])) { |
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return $separators[$index + 1]; |
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} |
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}; |
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} |
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public function addToOutput(&$output, &$key, &$value) |
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{ |
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return function () use (&$output, &$key, &$value) { |
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foreach (array('key', 'value') as $var) { |
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${$var} = trim(${$var}); |
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if (empty(${$var})) { |
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continue; |
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} |
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if (preg_match('/^\d*[a-zA-Z_]/', ${$var})) { |
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${$var} = var_export(${$var}, true); |
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} |
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} |
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$output[] = empty($value) |
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? $key |
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: $key . ' => ' . $value; |
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$key = ''; |
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$value = null; |
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}; |
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} |
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public function consume() |
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{ |
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return function (&$argument, $start) { |
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$argument = substr($argument, strlen($start)); |
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}; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: