File - Code Metrics - Inspection of "Cleanup" - Symplify/PHP7_CodeSniffer - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Pull Request — master (#11)

by Tomáš
created 2016-06-27 23:45 UTC
File D

↳ Parent: Project
Complexity

Total Complexity
296
Size/Duplication

Total Lines	2079
Duplicated Lines	11.11 %
Coupling/Cohesion

Components	2
Dependencies	7
Test Coverage

Coverage
Importance

Changes	2
Bugs	0	Features	0
Metric	Value
wmc	296
c	2
b	0
f	0
lcom	2
cbo	7
dl	231
loc	2079
ccs	0
cts	1109
cp	0
rs	4.4102
41 Methods

Rating	Name	Duplication	Size	Complexity
B	__construct()	0	24	2
A	setContent()	0	13	2
A	reloadContent()	0	4	1
A	disableCaching()	0	5	1
D	process()	28	140	30
C	parse()	0	57	13
A	getTokens()	0	5	1
A	cleanUp()	0	9	1
A	addError()	19	19	2
A	addWarning()	19	19	2
A	addErrorOnLine()	0	10	1
A	addWarningOnLine()	0	10	1
A	addFixableError()	15	15	3
A	addFixableWarning()	15	15	3
F	addMessage()	26	179	38
A	recordMetric()	0	15	3
A	getErrorCount()	0	5	1
A	getWarningCount()	0	5	1
A	getSuccessCount()	0	5	1
A	getFixableCount()	0	5	1
A	getIgnoredLines()	0	5	1
A	getErrors()	0	5	1
A	getWarnings()	0	5	1
A	getMetrics()	0	5	1
A	getFilename()	0	5	1
D	getDeclarationName()	6	28	9
C	isAnonymousFunction()	6	33	7
F	getMethodParameters()	12	125	27
C	getMethodProperties()	0	65	10
C	getMemberProperties()	0	78	15
B	getClassProperties()	0	39	6
D	isReference()	0	83	19
A	getTokensAsString()	0	15	3
C	findPrevious()	30	53	16
C	findNext()	13	39	11
C	findStartOfStatement()	17	55	13
C	findEndOfStatement()	25	65	20
C	findFirstOnLine()	0	40	11
B	hasCondition()	0	25	5
B	getCondition()	0	22	5
B	findExtendedClassName()	0	38	6
How to fix Duplicated Code Complexity

Duplicated Code

Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
If you have the same expression in different places: Extract expression to a method
If you have the same method in different sub-classes: Extract method, and pull up field to the parent class
If you have the same code in unrelated classes: Consider extracting the code to a new class, and injecting that class
Complex Class

Tip: Before tackling complexity, make sure that you eliminate any duplication first. This often can reduce the size of classes significantly.
Complex classes like File often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use File, and based on these observations, apply Extract Interface, too.
<?php
/**
 * Represents a piece of content being checked during the run.
 *
 * @author    Greg Sherwood <[email protected]>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/Symplify\PHP7_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace Symplify\PHP7_CodeSniffer\Files;

use Symplify\PHP7_CodeSniffer\Ruleset;
use Symplify\PHP7_CodeSniffer\Config;
use Symplify\PHP7_CodeSniffer\Fixer;
use Symplify\PHP7_CodeSniffer\Util;
use Symplify\PHP7_CodeSniffer\Exceptions\RuntimeException;
use Symplify\PHP7_CodeSniffer\Exceptions\TokenizerException;

class File
{

    /**
     * The absolute path to the file associated with this object.
     *
     * @var string
     */
    public $path = '';

    /**
     * The absolute path to the file associated with this object.
     *
     * @var string
     */
    protected $content = '';

    /**
     * The config data for the run.
     *
     * @var \Symplify\PHP7_CodeSniffer\Config
     */
    public $config = null;

    /**
     * The ruleset used for the run.
     *
     * @var \Symplify\PHP7_CodeSniffer\Ruleset
     */
    public $ruleset = null;

    /**
     * If TRUE, the entire file is being ignored.
     *
     * @var string
     */
    public $ignored = false;

    /**
     * The EOL character this file uses.
     *
     * @var string
     */
    public $eolChar = '';

    /**
     * The Fixer object to control fixing errors.
     *
     * @var \Symplify\PHP7_CodeSniffer\Fixer
     */
    public $fixer = null;

    /**
     * The tokenizer being used for this file.
     *
     * @var \Symplify\PHP7_CodeSniffer\Tokenizers\Tokenizer
     */
    public $tokenizer = null;

    /**
     * Was the file loaded from cache?
     *
     * If TRUE, the file was loaded from a local cache.
     * If FALSE, the file was tokenized and processed fully.
     *
     * @var boolean
     */
    public $fromCache = false;

    /**
     * The number of tokens in this file.
     *
     * Stored here to save calling count() everywhere.
     *
     * @var integer
     */
    public $numTokens = 0;

    /**
     * The tokens stack map.
     *
     * @var array
     */
    protected $tokens = array();

    /**
     * The errors raised from sniffs.
     *
     * @var array
     * @see getErrors()
     */
    protected $errors = array();

    /**
     * The warnings raised from sniffs.
     *
     * @var array
     * @see getWarnings()
     */
    protected $warnings = array();

    /**
     * The metrics recorded by sniffs.
     *
     * @var array
     * @see getMetrics()
     */
    protected $metrics = array();

    /**
     * The total number of errors raised.
     *
     * @var integer
     */
    protected $errorCount = 0;

    /**
     * The total number of warnings raised.
     *
     * @var integer
     */
    protected $warningCount = 0;

    /**
     * The total number of errors and warnings that can be fixed.
     *
     * @var integer
     */
    protected $fixableCount = 0;

    /**
     * An array of sniffs that are being ignored.
     *
     * @var array
     */
    protected $ignoredListeners = array();

    /**
     * An array of message codes that are being ignored.
     *
     * @var array
     */
    protected $ignoredCodes = array();

    /**
     * An array of sniffs listening to this file's processing.
     *
     * @var \Symplify\PHP7_CodeSniffer\Sniffs\Sniff[]
     */
    protected $listeners = array();

    /**
     * The class name of the sniff currently processing the file.
     *
     * @var string
     */
    protected $activeListener = '';

    /**
     * An array of sniffs being processed and how long they took.
     *
     * @var array
     */
    protected $listenerTimes = array();

    /**
     * A cache of often used config settings to improve performance.
     *
     * Storing them here saves 10k+ calls to __get() in the Config class.
     *
     * @var array
     */
    protected $configCache = array();


    /**
     * Constructs a file.
     *
     * @param string                   $path    The absolute path to the file to process.
     * @param \Symplify\PHP7_CodeSniffer\Ruleset $ruleset The ruleset used for the run.
     * @param \Symplify\PHP7_CodeSniffer\Config  $config  The config data for the run.
     *
     * @return void

     */
    public function __construct($path, Ruleset $ruleset, Config $config)
    {
        $this->path    = $path;
        $this->ruleset = $ruleset;
        $this->config  = $config;
        $this->fixer   = new Fixer();

        $parts     = explode('.', $path);
        $extension = array_pop($parts);
        if (isset($config->extensions[$extension]) === true) {
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
            $this->tokenizerType = $config->extensions[$extension];
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        } else {
            // Revert to default.
            $this->tokenizerType = 'PHP';

        }

        $this->configCache['cache']           = $this->config->cache;
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        $this->configCache['sniffs']          = $this->config->sniffs;
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        $this->configCache['errorSeverity']   = $this->config->errorSeverity;
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        $this->configCache['warningSeverity'] = $this->config->warningSeverity;
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        $this->configCache['recordErrors']    = $this->config->recordErrors;
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        $this->configCache['ignorePatterns']  = $this->ruleset->getIgnorePatterns();

    }//end __construct()


    /**
     * Set the content of the file.
     *
     * Setting the content also calculates the EOL char being used.
     *
     * @param string $content The file content.
     *
     * @return void
     */
    function setContent($content)

    {
        $this->content = $content;
        $this->tokens  = array();

        try {
            $this->eolChar = Util\Common::detectLineEndings($content);
        } catch (RuntimeException $e) {
            $this->addWarningOnLine($e->getMessage(), 1, 'Internal.DetectLineEndings');
            return;
        }

    }//end setContent()


    /**
     * Reloads the content of the file.
     *
     * By default, we have no idea where our content comes from,
     * so we can't do anything.
     *
     * @return void
     */
    function reloadContent()

    {

    }//end reloadContent()


    /**
     * Disables caching of this file.
     *
     * @return void
     */
    function disableCaching()

    {
        $this->configCache['cache'] = false;

    }//end disableCaching()


    /**
     * Starts the stack traversal and tells listeners when tokens are found.
     *
     * @return void
     */
    public function process()
    {
        if ($this->ignored === true) {
            return;
        }

        $this->errors       = array();
        $this->warnings     = array();
        $this->errorCount   = 0;
        $this->warningCount = 0;
        $this->fixableCount = 0;

        $this->parse();

        $this->fixer->startFile($this);

        $foundCode        = false;
        $listenerIgnoreTo = array();
        $inTests          = defined('Symplify\PHP7_CodeSniffer_IN_TESTS');

        // Foreach of the listeners that have registered to listen for this
        // token, get them to process it.
        foreach ($this->tokens as $stackPtr => $token) {
            // Check for ignored lines.
            if ($token['code'] === T_COMMENT
                || $token['code'] === T_DOC_COMMENT_TAG
                || ($inTests === true && $token['code'] === T_INLINE_HTML)
            ) {
                if (strpos($token['content'], '@codingStandards') !== false) {
                    if (strpos($token['content'], '@codingStandardsIgnoreFile') !== false) {
                        // Ignoring the whole file, just a little late.
                        $this->errors       = array();
                        $this->warnings     = array();
                        $this->errorCount   = 0;
                        $this->warningCount = 0;
                        $this->fixableCount = 0;
                        return;
                    } else if (strpos($token['content'], '@codingStandardsChangeSetting') !== false) {
                        $start   = strpos($token['content'], '@codingStandardsChangeSetting');
                        $comment = substr($token['content'], ($start + 30));
                        $parts   = explode(' ', $comment);
                        if ($parts >= 3) {
                            $sniffParts = explode('.', $parts[0]);
                            if ($sniffParts >= 3) {
                                // If the sniff code is not know to us, it has not been registered in this run.
                                // But don't throw an error as it could be there for a different standard to use.
                                if (isset($this->ruleset->sniffCodes[$parts[0]]) === true) {
                                    $listenerClass = $this->ruleset->sniffCodes[$parts[0]];
                                    $this->ruleset->setSniffProperty($listenerClass, $parts[1], $parts[2]);
                                }
                            }
                        }
                    }//end if
                }//end if
            }//end if

            if ($token['code'] !== T_INLINE_HTML) {
                $foundCode = true;
            }

            if (isset($this->ruleset->tokenListeners[$token['code']]) === false) {
                continue;
            }

            foreach ($this->ruleset->tokenListeners[$token['code']] as $listenerData) {
                if (isset($this->ignoredListeners[$listenerData['class']]) === true
                    || (isset($listenerIgnoreTo[$listenerData['class']]) === true
                    && $listenerIgnoreTo[$listenerData['class']] > $stackPtr)
                ) {
                    // This sniff is ignoring past this token, or the whole file.
                    continue;
                }

                // Make sure this sniff supports the tokenizer
                // we are currently using.
                $class = $listenerData['class'];

                if (isset($listenerData['tokenizers'][$this->tokenizerType]) === false) {

                    continue;
                }

                // If the file path matches one of our ignore patterns, skip it.
                // While there is support for a type of each pattern
                // (absolute or relative) we don't actually support it here.
                foreach ($listenerData['ignore'] as $pattern) {

                    // We assume a / directory separator, as do the exclude rules
                    // most developers write, so we need a special case for any system
                    // that is different.
                    if (DIRECTORY_SEPARATOR === '\\') {
                        $pattern = str_replace('/', '\\\\', $pattern);
                    }

                    $pattern = '`'.$pattern.'`i';
                    if (preg_match($pattern, $this->path) === 1) {
                        $this->ignoredListeners[$class] = true;
                        continue(2);
                    }
                }

                // If the file path does not match one of our include patterns, skip it.
                // While there is support for a type of each pattern
                // (absolute or relative) we don't actually support it here.
                foreach ($listenerData['include'] as $pattern) {

                    // We assume a / directory separator, as do the exclude rules
                    // most developers write, so we need a special case for any system
                    // that is different.
                    if (DIRECTORY_SEPARATOR === '\\') {
                        $pattern = str_replace('/', '\\\\', $pattern);
                    }

                    $pattern = '`'.$pattern.'`i';
                    if (preg_match($pattern, $this->path) !== 1) {
                        $this->ignoredListeners[$class] = true;
                        continue(2);
                    }
                }

                $this->activeListener = $class;

                $ignoreTo = $this->ruleset->sniffs[$class]->process($this, $stackPtr);
                if ($ignoreTo !== null) {
                    $listenerIgnoreTo[$this->activeListener] = $ignoreTo;
                }

                $this->activeListener = '';
            }//end foreach
        }//end foreach

        // If short open tags are off but the file being checked uses
        // short open tags, the whole content will be inline HTML
        // and nothing will be checked. So try and handle this case.
        if ($foundCode === false && $this->tokenizerType === 'PHP') {

            $shortTags = (bool) ini_get('short_open_tag');
            if ($shortTags === false) {
                $error = 'No PHP code was found in this file and short open tags are not allowed by this install of PHP. This file may be using short open tags but PHP does not allow them.';
                $this->addWarning($error, null, 'Internal.NoCodeFound');
            }
        }

    }//end process()


    /**
     * Tokenizes the file and prepares it for the test run.
     *
     * @return void
     */
    public function parse()
    {
        if (empty($this->tokens) === false) {
            // File has already been parsed.
            return;
        }

        try {
            $tokenizerClass  = 'Symplify\PHP7_CodeSniffer\Tokenizers\\'.$this->tokenizerType;

            $this->tokenizer = new $tokenizerClass($this->content, $this->config, $this->eolChar);
            $this->tokens    = $this->tokenizer->getTokens();
        } catch (TokenizerException $e) {
            $this->addWarning($e->getMessage(), null, 'Internal.Tokenizer.Exception');
            if (PHP_CodeSniffer_VERBOSITY > 0
                || (PHP_CodeSniffer_CBF === true && $this->config->stdin === false)
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
            ) {
                echo "[$this->tokenizerType => tokenizer error]... ";

                if (PHP_CodeSniffer_VERBOSITY > 1) {
                    echo PHP_EOL;
                }
            }

            return;
        }

        $this->numTokens = count($this->tokens);

        // Check for mixed line endings as these can cause tokenizer errors and we
        // should let the user know that the results they get may be incorrect.
        // This is done by removing all backslashes, removing the newline char we
        // detected, then converting newlines chars into text. If any backslashes
        // are left at the end, we have additional newline chars in use.
        $contents = str_replace('\\', '', $this->content);
        $contents = str_replace($this->eolChar, '', $contents);
        $contents = str_replace("\n", '\n', $contents);
        $contents = str_replace("\r", '\r', $contents);
        if (strpos($contents, '\\') !== false) {
            $error = 'File has mixed line endings; this may cause incorrect results';
            $this->addWarningOnLine($error, 1, 'Internal.LineEndings.Mixed');
        }

        if (PHP_CodeSniffer_VERBOSITY > 0
            || (PHP_CodeSniffer_CBF === true && $this->config->stdin === false)
<?php

/**
 * @property int $x
 * @property int $y
 * @property string $text
 */
class MyLabel
{
    private $properties;

    private $allowedProperties = array('x', 'y', 'text');

    public function __get($name)
    {
        if (isset($properties[$name]) && in_array($name, $this->allowedProperties)) {
            return $properties[$name];
        } else {
            return null;
        }
    }

    public function __set($name, $value)
    {
        if (in_array($name, $this->allowedProperties)) {
            $properties[$name] = $value;
        } else {
            throw new \LogicException("Property $name is not defined.");
        }
    }

}
        ) {
            if ($this->numTokens === 0) {
                $numLines = 0;
            } else {
                $numLines = $this->tokens[($this->numTokens - 1)]['line'];
            }

            echo "[$this->tokenizerType => $this->numTokens tokens in $numLines lines]... ";

            if (PHP_CodeSniffer_VERBOSITY > 1) {
                echo PHP_EOL;
            }
        }

    }//end parse()


    /**
     * Returns the token stack for this file.
     *
     * @return array
     */
    public function getTokens()
    {
        return $this->tokens;

    }//end getTokens()


    /**
     * Remove vars stored in this file that are no longer required.
     *
     * @return void
     */
    public function cleanUp()
    {
        $this->listenerTimes = null;

        $this->content       = null;
        $this->tokens        = null;

        $this->tokenizer     = null;
        $this->fixer         = null;

    }//end cleanUp()


    /**
     * Records an error against a specific token in the file.
     *
     * @param string  $error    The error message.
     * @param int     $stackPtr The stack position where the error occurred.
     * @param string  $code     A violation code unique to the sniff message.
     * @param array   $data     Replacements for the error message.
     * @param int     $severity The severity level for this error. A value of 0
     *                          will be converted into the default severity level.
     * @param boolean $fixable  Can the error be fixed by the sniff?
     *
     * @return boolean
     */
    public function addError(

        $error,
        $stackPtr,
        $code,
        $data=array(),
        $severity=0,
        $fixable=false
    ) {
        if ($stackPtr === null) {
            $line   = 1;
            $column = 1;
        } else {
            $line   = $this->tokens[$stackPtr]['line'];
            $column = $this->tokens[$stackPtr]['column'];
        }

        return $this->addMessage(true, $error, $line, $column, $code, $data, $severity, $fixable);

    }//end addError()


    /**
     * Records a warning against a specific token in the file.
     *
     * @param string  $warning  The error message.
     * @param int     $stackPtr The stack position where the error occurred.
     * @param string  $code     A violation code unique to the sniff message.
     * @param array   $data     Replacements for the warning message.
     * @param int     $severity The severity level for this warning. A value of 0
     *                          will be converted into the default severity level.
     * @param boolean $fixable  Can the warning be fixed by the sniff?
     *
     * @return boolean
     */
    public function addWarning(

        $warning,
        $stackPtr,
        $code,
        $data=array(),
        $severity=0,
        $fixable=false
    ) {
        if ($stackPtr === null) {
            $line   = 1;
            $column = 1;
        } else {
            $line   = $this->tokens[$stackPtr]['line'];
            $column = $this->tokens[$stackPtr]['column'];
        }

        return $this->addMessage(false, $warning, $line, $column, $code, $data, $severity, $fixable);

    }//end addWarning()


    /**
     * Records an error against a specific line in the file.
     *
     * @param string $error    The error message.
     * @param int    $line     The line on which the error occurred.
     * @param string $code     A violation code unique to the sniff message.
     * @param array  $data     Replacements for the error message.
     * @param int    $severity The severity level for this error. A value of 0
     *                         will be converted into the default severity level.
     *
     * @return boolean
     */
    public function addErrorOnLine(
        $error,
        $line,
        $code,
        $data=array(),
        $severity=0
    ) {
        return $this->addMessage(true, $error, $line, 1, $code, $data, $severity, false);

    }//end addErrorOnLine()


    /**
     * Records a warning against a specific token in the file.
     *
     * @param string $warning  The error message.
     * @param int    $line     The line on which the warning occurred.
     * @param string $code     A violation code unique to the sniff message.
     * @param array  $data     Replacements for the warning message.
     * @param int    $severity The severity level for this warning. A value of 0 will
     *                         will be converted into the default severity level.
     *
     * @return boolean
     */
    public function addWarningOnLine(
        $warning,
        $line,
        $code,
        $data=array(),
        $severity=0
    ) {
        return $this->addMessage(false, $warning, $line, 1, $code, $data, $severity, false);

    }//end addWarningOnLine()


    /**
     * Records a fixable error against a specific token in the file.
     *
     * Returns true if the error was recorded and should be fixed.
     *
     * @param string $error    The error message.
     * @param int    $stackPtr The stack position where the error occurred.
     * @param string $code     A violation code unique to the sniff message.
     * @param array  $data     Replacements for the error message.
     * @param int    $severity The severity level for this error. A value of 0
     *                         will be converted into the default severity level.
     *
     * @return boolean
     */
    public function addFixableError(

        $error,
        $stackPtr,
        $code,
        $data=array(),
        $severity=0
    ) {
        $recorded = $this->addError($error, $stackPtr, $code, $data, $severity, true);
        if ($recorded === true && $this->fixer->enabled === true) {
            return true;
        }

        return false;

    }//end addFixableError()


    /**
     * Records a fixable warning against a specific token in the file.
     *
     * Returns true if the warning was recorded and should be fixed.
     *
     * @param string $warning  The error message.
     * @param int    $stackPtr The stack position where the error occurred.
     * @param string $code     A violation code unique to the sniff message.
     * @param array  $data     Replacements for the warning message.
     * @param int    $severity The severity level for this warning. A value of 0
     *                         will be converted into the default severity level.
     *
     * @return boolean
     */
    public function addFixableWarning(

        $warning,
        $stackPtr,
        $code,
        $data=array(),
        $severity=0
    ) {
        $recorded = $this->addWarning($warning, $stackPtr, $code, $data, $severity, true);
        if ($recorded === true && $this->fixer->enabled === true) {
            return true;
        }

        return false;

    }//end addFixableWarning()


    /**
     * Adds an error to the error stack.
     *
     * @param boolean $error    Is this an error message?
     * @param string  $message  The text of the message.
     * @param int     $line     The line on which the message occurred.
     * @param int     $column   The column at which the message occurred.
     * @param string  $code     A violation code unique to the sniff message.
     * @param array   $data     Replacements for the message.
     * @param int     $severity The severity level for this message. A value of 0
     *                          will be converted into the default severity level.
     * @param boolean $fixable  Can the problem be fixed by the sniff?
     *
     * @return boolean
     */
    protected function addMessage($error, $message, $line, $column, $code, $data, $severity, $fixable)
    {
        if (isset($this->tokenizer->ignoredLines[$line]) === true) {
            return false;
        }

        $includeAll = true;
        if ($this->configCache['cache'] === false

            || $this->configCache['recordErrors'] === false
        ) {
            $includeAll = false;
        }

        // Work out which sniff generated the message.
        $parts = explode('.', $code);
        if ($parts[0] === 'Internal') {
            // An internal message.
            $listenerCode = Util\Common::getSniffCode($this->activeListener);
            $sniffCode    = $code;
            $checkCodes   = array($sniffCode);
        } else {
            if ($parts[0] !== $code) {
                // The full message code has been passed in.
                $sniffCode    = $code;
                $listenerCode = substr($sniffCode, 0, strrpos($sniffCode, '.'));
            } else {
                $listenerCode = Util\Common::getSniffCode($this->activeListener);
                $sniffCode    = $listenerCode.'.'.$code;
                $parts        = explode('.', $sniffCode);
            }

            $checkCodes = array(
                           $sniffCode,
                           $parts[0].'.'.$parts[1].'.'.$parts[2],
                           $parts[0].'.'.$parts[1],
                           $parts[0],
                          );
        }//end if

        // Filter out any messages for sniffs that shouldn't have run
        // due to the use of the --sniffs command line argument.
        if ($includeAll === false
            && empty($this->configCache['sniffs']) === false
            && in_array($listenerCode, $this->configCache['sniffs']) === false
        ) {
            return false;
        }

        // If we know this sniff code is being ignored for this file, return early.
        foreach ($checkCodes as $checkCode) {
            if (isset($this->ignoredCodes[$checkCode]) === true) {
                return false;
            }
        }

        $oppositeType = 'warning';
        if ($error === false) {
            $oppositeType = 'error';
        }

        foreach ($checkCodes as $checkCode) {

            // Make sure this message type has not been set to the opposite message type.
            if (isset($this->ruleset->ruleset[$checkCode]['type']) === true
                && $this->ruleset->ruleset[$checkCode]['type'] === $oppositeType
            ) {
                $error = !$error;
                break;
            }
        }

        if ($error === true) {
            $configSeverity = $this->configCache['errorSeverity'];
            $messageCount   = &$this->errorCount;
            $messages       = &$this->errors;
        } else {
            $configSeverity = $this->configCache['warningSeverity'];
            $messageCount   = &$this->warningCount;
            $messages       = &$this->warnings;
        }

        if ($includeAll === false && $configSeverity === 0) {
            // Don't bother doing any processing as these messages are just going to
            // be hidden in the reports anyway.
            return false;
        }

        if ($severity === 0) {
            $severity = 5;
        }

        foreach ($checkCodes as $checkCode) {

            // Make sure we are interested in this severity level.
            if (isset($this->ruleset->ruleset[$checkCode]['severity']) === true) {
                $severity = $this->ruleset->ruleset[$checkCode]['severity'];
                break;
            }
        }

        if ($includeAll === false && $configSeverity > $severity) {
            return false;
        }

        // Make sure we are not ignoring this file.
        foreach ($checkCodes as $checkCode) {
            if (isset($this->configCache['ignorePatterns'][$checkCode]) === false) {
                continue;
            }

            foreach ($this->configCache['ignorePatterns'][$checkCode] as $pattern => $type) {
                // While there is support for a type of each pattern
                // (absolute or relative) we don't actually support it here.
                $replacements = array(
                                 '\\,' => ',',
                                 '*'   => '.*',
                                );

                // We assume a / directory separator, as do the exclude rules
                // most developers write, so we need a special case for any system
                // that is different.
                if (DIRECTORY_SEPARATOR === '\\') {
                    $replacements['/'] = '\\\\';
                }

                $pattern = '`'.strtr($pattern, $replacements).'`i';
                if (preg_match($pattern, $this->path) === 1) {
                    $this->ignoredCodes[$checkCode] = true;
                    return false;
                }
            }//end foreach
        }//end foreach

        $messageCount++;
        if ($fixable === true) {
            $this->fixableCount++;
        }

        if ($this->configCache['recordErrors'] === false

            && $includeAll === false
        ) {
            return true;
        }

        // Work out the error message.
        if (isset($this->ruleset->ruleset[$sniffCode]['message']) === true) {
            $message = $this->ruleset->ruleset[$sniffCode]['message'];
        }

        if (empty($data) === false) {
            $message = vsprintf($message, $data);
        }

        if (isset($messages[$line]) === false) {
            $messages[$line] = array();
        }

        if (isset($messages[$line][$column]) === false) {
            $messages[$line][$column] = array();
        }

        $messages[$line][$column][] = array(
                                       'message'  => $message,
                                       'source'   => $sniffCode,
                                       'listener' => $this->activeListener,
                                       'severity' => $severity,
                                       'fixable'  => $fixable,
                                      );

        if (PHP_CodeSniffer_VERBOSITY > 1
            && $this->fixer->enabled === true
            && $fixable === true
        ) {
            @ob_end_clean();
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
            echo "\tE: [Line $line] $message ($sniffCode)".PHP_EOL;
            ob_start();
        }

        return true;

    }//end addMessage()


    /**
     * Adds an warning to the warning stack.
     *
     * @param int    $stackPtr The stack position where the metric was recorded.
     * @param string $metric   The name of the metric being recorded.
     * @param string $value    The value of the metric being recorded.
     *
     * @return boolean
     */
    public function recordMetric($stackPtr, $metric, $value)

    {
        if (isset($this->metrics[$metric]) === false) {
            $this->metrics[$metric] = array('values' => array($value => 1));
        } else {
            if (isset($this->metrics[$metric]['values'][$value]) === false) {
                $this->metrics[$metric]['values'][$value] = 1;
            } else {
                $this->metrics[$metric]['values'][$value]++;
            }
        }

        return true;

    }//end recordMetric()


    /**
     * Returns the number of errors raised.
     *
     * @return int
     */
    public function getErrorCount()
    {
        return $this->errorCount;

    }//end getErrorCount()


    /**
     * Returns the number of warnings raised.
     *
     * @return int
     */
    public function getWarningCount()
    {
        return $this->warningCount;

    }//end getWarningCount()


    /**
     * Returns the number of successes recorded.
     *
     * @return int
     */
    public function getSuccessCount()
    {
        return $this->successCount;
class MyClass { }

$x = new MyClass();
$x->foo = true;

    }//end getSuccessCount()


    /**
     * Returns the number of fixable errors/warnings raised.
     *
     * @return int
     */
    public function getFixableCount()
    {
        return $this->fixableCount;

    }//end getFixableCount()


    /**
     * Returns the list of ignored lines.
     *
     * @return array
     */
    public function getIgnoredLines()
    {
        return $this->tokenizer->ignoredLines;

    }//end getIgnoredLines()


    /**
     * Returns the errors raised from processing this file.
     *
     * @return array
     */
    public function getErrors()
    {
        return $this->errors;

    }//end getErrors()


    /**
     * Returns the warnings raised from processing this file.
     *
     * @return array
     */
    public function getWarnings()
    {
        return $this->warnings;

    }//end getWarnings()


    /**
     * Returns the metrics found while processing this file.
     *
     * @return array
     */
    public function getMetrics()
    {
        return $this->metrics;

    }//end getMetrics()


    /**
     * Returns the absolute filename of this file.
     *
     * @return string
     */
    public function getFilename()
    {
        return $this->path;

    }//end getFilename()


    /**
     * Returns the declaration names for T_CLASS, T_INTERFACE and T_FUNCTION tokens.
     *
     * @param int $stackPtr The position of the declaration token which
     *                      declared the class, interface or function.
     *
     * @return string|null The name of the class, interface or function.
     *                     or NULL if the function is a closure.
     * @throws Symplify\PHP7_CodeSniffer_Exception If the specified token is not of type
     *                                   T_FUNCTION, T_CLASS or T_INTERFACE.
     */
    public function getDeclarationName($stackPtr)
    {
        $tokenCode = $this->tokens[$stackPtr]['code'];
        if ($tokenCode !== T_FUNCTION
            && $tokenCode !== T_CLASS
            && $tokenCode !== T_INTERFACE
            && $tokenCode !== T_TRAIT
        ) {
            throw new RuntimeException('Token type "'.$this->tokens[$stackPtr]['type'].'" is not T_FUNCTION, T_CLASS, T_INTERFACE or T_TRAIT');
        }

        if ($tokenCode === T_FUNCTION
            && $this->isAnonymousFunction($stackPtr) === true
        ) {
            return null;
        }

        $content = null;
        for ($i = $stackPtr; $i < $this->numTokens; $i++) {

            if ($this->tokens[$i]['code'] === T_STRING) {
                $content = $this->tokens[$i]['content'];
                break;
            }
        }

        return $content;

    }//end getDeclarationName()


    /**
     * Check if the token at the specified position is a anonymous function.
     *
     * @param int $stackPtr The position of the declaration token which
     *                      declared the class, interface or function.
     *
     * @return boolean
     * @throws Symplify\PHP7_CodeSniffer_Exception If the specified token is not of type
     *                                   T_FUNCTION
     */
    public function isAnonymousFunction($stackPtr)
    {
        $tokenCode = $this->tokens[$stackPtr]['code'];
        if ($tokenCode !== T_FUNCTION) {
            throw new TokenizerException('Token type is not T_FUNCTION');
        }

        if (isset($this->tokens[$stackPtr]['parenthesis_opener']) === false) {
            // Something is not right with this function.
            return false;
        }

        $name = false;
        for ($i = ($stackPtr + 1); $i < $this->numTokens; $i++) {

            if ($this->tokens[$i]['code'] === T_STRING) {
                $name = $i;
                break;
            }
        }

        if ($name === false) {
            // No name found.
            return true;
        }

        $open = $this->tokens[$stackPtr]['parenthesis_opener'];
        if ($name > $open) {
            return true;
        }

        return false;

    }//end isAnonymousFunction()


    /**
     * Returns the method parameters for the specified T_FUNCTION token.
     *
     * Each parameter is in the following format:
     *
     * <code>
     *   0 => array(
     *         'name'              => '$var',  // The variable name.
     *         'pass_by_reference' => false,   // Passed by reference.
     *         'type_hint'         => string,  // Type hint for array or custom type
     *        )
     * </code>
     *
     * Parameters with default values have an additional array index of
     * 'default' with the value of the default as a string.
     *
     * @param int $stackPtr The position in the stack of the T_FUNCTION token
     *                      to acquire the parameters for.
     *
     * @return array
     * @throws Symplify\PHP7_CodeSniffer_Exception If the specified $stackPtr is not of
     *                                   type T_FUNCTION.
     */
    public function getMethodParameters($stackPtr)
    {
        if ($this->tokens[$stackPtr]['code'] !== T_FUNCTION) {
            throw new TokenizerException('$stackPtr must be of type T_FUNCTION');
        }

        $opener = $this->tokens[$stackPtr]['parenthesis_opener'];
        $closer = $this->tokens[$stackPtr]['parenthesis_closer'];

        $vars            = array();
        $currVar         = null;
        $defaultStart    = null;
        $paramCount      = 0;
        $passByReference = false;
        $variableLength  = false;
        $typeHint        = '';

        for ($i = ($opener + 1); $i <= $closer; $i++) {
            // Check to see if this token has a parenthesis or bracket opener. If it does
            // it's likely to be an array which might have arguments in it. This
            // could cause problems in our parsing below, so lets just skip to the
            // end of it.
            if (isset($this->tokens[$i]['parenthesis_opener']) === true) {
                // Don't do this if it's the close parenthesis for the method.
                if ($i !== $this->tokens[$i]['parenthesis_closer']) {
                    $i = ($this->tokens[$i]['parenthesis_closer'] + 1);
                }
            }

            if (isset($this->tokens[$i]['bracket_opener']) === true) {
                // Don't do this if it's the close parenthesis for the method.
                if ($i !== $this->tokens[$i]['bracket_closer']) {
                    $i = ($this->tokens[$i]['bracket_closer'] + 1);
                }
            }

            switch ($this->tokens[$i]['code']) {
            case T_BITWISE_AND:
                $passByReference = true;
                break;
            case T_VARIABLE:
                $currVar = $i;
                break;
            case T_ELLIPSIS:
                $variableLength = true;
                break;
            case T_ARRAY_HINT:
            case T_CALLABLE:
                $typeHint = $this->tokens[$i]['content'];
                break;
            case T_STRING:
                // This is a string, so it may be a type hint, but it could
                // also be a constant used as a default value.
                $prevComma = false;
                for ($t = $i; $t >= $opener; $t--) {

                    if ($this->tokens[$t]['code'] === T_COMMA) {
                        $prevComma = $t;
                        break;
                    }
                }

                if ($prevComma !== false) {
                    $nextEquals = false;
                    for ($t = $prevComma; $t < $i; $t++) {

                        if ($this->tokens[$t]['code'] === T_EQUAL) {
                            $nextEquals = $t;
                            break;
                        }
                    }

                    if ($nextEquals !== false) {
                        break;
                    }
                }

                if ($defaultStart === null) {
                    $typeHint .= $this->tokens[$i]['content'];
                }
                break;
            case T_NS_SEPARATOR:
                // Part of a type hint or default value.
                if ($defaultStart === null) {
                    $typeHint .= $this->tokens[$i]['content'];
                }
                break;
            case T_CLOSE_PARENTHESIS:
            case T_COMMA:
                // If it's null, then there must be no parameters for this
                // method.
                if ($currVar === null) {
                    continue;
                }

                $vars[$paramCount]         = array();
                $vars[$paramCount]['name'] = $this->tokens[$currVar]['content'];

                if ($defaultStart !== null) {
                    $vars[$paramCount]['default']
                        = $this->getTokensAsString(
                            $defaultStart,
                            ($i - $defaultStart)
                        );
                }

                $vars[$paramCount]['pass_by_reference'] = $passByReference;
                $vars[$paramCount]['variable_length']   = $variableLength;
                $vars[$paramCount]['type_hint']         = $typeHint;

                // Reset the vars, as we are about to process the next parameter.
                $defaultStart    = null;
                $passByReference = false;
                $variableLength  = false;
                $typeHint        = '';

                $paramCount++;
                break;
            case T_EQUAL:
                $defaultStart = ($i + 1);
                break;
            }//end switch
        }//end for

        return $vars;

    }//end getMethodParameters()


    /**
     * Returns the visibility and implementation properties of a method.
     *
     * The format of the array is:
     * <code>
     *   array(
     *    'scope'           => 'public', // public protected or protected
     *    'scope_specified' => true,     // true is scope keyword was found.
     *    'is_abstract'     => false,    // true if the abstract keyword was found.
     *    'is_final'        => false,    // true if the final keyword was found.
     *    'is_static'       => false,    // true if the static keyword was found.
     *    'is_closure'      => false,    // true if no name is found.
     *   );
     * </code>
     *
     * @param int $stackPtr The position in the stack of the T_FUNCTION token to
     *                      acquire the properties for.
     *
     * @return array
     * @throws Symplify\PHP7_CodeSniffer_Exception If the specified position is not a
     *                                   T_FUNCTION token.
     */
    public function getMethodProperties($stackPtr)
    {
        if ($this->tokens[$stackPtr]['code'] !== T_FUNCTION) {
            throw new TokenizerException('$stackPtr must be of type T_FUNCTION');
        }

        $valid = array(
                  T_PUBLIC      => T_PUBLIC,
                  T_PRIVATE     => T_PRIVATE,
                  T_PROTECTED   => T_PROTECTED,
                  T_STATIC      => T_STATIC,
                  T_FINAL       => T_FINAL,
                  T_ABSTRACT    => T_ABSTRACT,
                  T_WHITESPACE  => T_WHITESPACE,
                  T_COMMENT     => T_COMMENT,
                  T_DOC_COMMENT => T_DOC_COMMENT,
                 );

        $scope          = 'public';
        $scopeSpecified = false;
        $isAbstract     = false;
        $isFinal        = false;
        $isStatic       = false;
        $isClosure      = $this->isAnonymousFunction($stackPtr);

        for ($i = ($stackPtr - 1); $i > 0; $i--) {
            if (isset($valid[$this->tokens[$i]['code']]) === false) {
                break;
            }

            switch ($this->tokens[$i]['code']) {
            case T_PUBLIC:
                $scope          = 'public';
                $scopeSpecified = true;
                break;
            case T_PRIVATE:
                $scope          = 'private';
                $scopeSpecified = true;
                break;
            case T_PROTECTED:
                $scope          = 'protected';
                $scopeSpecified = true;
                break;
            case T_ABSTRACT:
                $isAbstract = true;
                break;
            case T_FINAL:
                $isFinal = true;
                break;
            case T_STATIC:
                $isStatic = true;
                break;
            }//end switch
        }//end for

        return array(
                'scope'           => $scope,
                'scope_specified' => $scopeSpecified,
                'is_abstract'     => $isAbstract,
                'is_final'        => $isFinal,
                'is_static'       => $isStatic,
                'is_closure'      => $isClosure,
               );

    }//end getMethodProperties()


    /**
     * Returns the visibility and implementation properties of the class member
     * variable found at the specified position in the stack.
     *
     * The format of the array is:
     *
     * <code>
     *   array(
     *    'scope'       => 'public', // public protected or protected
     *    'is_static'   => false,    // true if the static keyword was found.
     *   );
     * </code>
     *
     * @param int $stackPtr The position in the stack of the T_VARIABLE token to
     *                      acquire the properties for.
     *
     * @return array
     * @throws Symplify\PHP7_CodeSniffer_Exception If the specified position is not a
     *                                   T_VARIABLE token, or if the position is not
     *                                   a class member variable.
     */
    public function getMemberProperties($stackPtr)
    {
        if ($this->tokens[$stackPtr]['code'] !== T_VARIABLE) {
            throw new TokenizerException('$stackPtr must be of type T_VARIABLE');
        }

        $conditions = array_keys($this->tokens[$stackPtr]['conditions']);
        $ptr        = array_pop($conditions);
        if (isset($this->tokens[$ptr]) === false
            || ($this->tokens[$ptr]['code'] !== T_CLASS
            && $this->tokens[$ptr]['code'] !== T_TRAIT)
        ) {
            if (isset($this->tokens[$ptr]) === true
                && $this->tokens[$ptr]['code'] === T_INTERFACE
            ) {
                // T_VARIABLEs in interfaces can actually be method arguments
                // but they wont be seen as being inside the method because there
                // are no scope openers and closers for abstract methods. If it is in
                // parentheses, we can be pretty sure it is a method argument.
                if (isset($this->tokens[$stackPtr]['nested_parenthesis']) === false
                    || empty($this->tokens[$stackPtr]['nested_parenthesis']) === true
                ) {
                    $error = 'Possible parse error: interfaces may not include member vars';
                    $this->addWarning($error, $stackPtr, 'Internal.ParseError.InterfaceHasMemberVar');
                    return array();
                }
            } else {
                throw new TokenizerException('$stackPtr is not a class member var');
            }
        }

        $valid = array(
                  T_PUBLIC      => T_PUBLIC,
                  T_PRIVATE     => T_PRIVATE,
                  T_PROTECTED   => T_PROTECTED,
                  T_STATIC      => T_STATIC,
                  T_WHITESPACE  => T_WHITESPACE,
                  T_COMMENT     => T_COMMENT,
                  T_DOC_COMMENT => T_DOC_COMMENT,
                  T_VARIABLE    => T_VARIABLE,
                  T_COMMA       => T_COMMA,
                 );

        $scope          = 'public';
        $scopeSpecified = false;
        $isStatic       = false;

        for ($i = ($stackPtr - 1); $i > 0; $i--) {
            if (isset($valid[$this->tokens[$i]['code']]) === false) {
                break;
            }

            switch ($this->tokens[$i]['code']) {
            case T_PUBLIC:
                $scope          = 'public';
                $scopeSpecified = true;
                break;
            case T_PRIVATE:
                $scope          = 'private';
                $scopeSpecified = true;
                break;
            case T_PROTECTED:
                $scope          = 'protected';
                $scopeSpecified = true;
                break;
            case T_STATIC:
                $isStatic = true;
                break;
            }
        }//end for

        return array(
                'scope'           => $scope,
                'scope_specified' => $scopeSpecified,
                'is_static'       => $isStatic,
               );

    }//end getMemberProperties()


    /**
     * Returns the visibility and implementation properties of a class.
     *
     * The format of the array is:
     * <code>
     *   array(
     *    'is_abstract' => false, // true if the abstract keyword was found.
     *    'is_final'    => false, // true if the final keyword was found.
     *   );
     * </code>
     *
     * @param int $stackPtr The position in the stack of the T_CLASS token to
     *                      acquire the properties for.
     *
     * @return array
     * @throws Symplify\PHP7_CodeSniffer_Exception If the specified position is not a
     *                                   T_CLASS token.
     */
    public function getClassProperties($stackPtr)
    {
        if ($this->tokens[$stackPtr]['code'] !== T_CLASS) {
            throw new TokenizerException('$stackPtr must be of type T_CLASS');
        }

        $valid = array(
                  T_FINAL       => T_FINAL,
                  T_ABSTRACT    => T_ABSTRACT,
                  T_WHITESPACE  => T_WHITESPACE,
                  T_COMMENT     => T_COMMENT,
                  T_DOC_COMMENT => T_DOC_COMMENT,
                 );

        $isAbstract = false;
        $isFinal    = false;

        for ($i = ($stackPtr - 1); $i > 0; $i--) {
            if (isset($valid[$this->tokens[$i]['code']]) === false) {
                break;
            }

            switch ($this->tokens[$i]['code']) {
            case T_ABSTRACT:
                $isAbstract = true;
                break;

            case T_FINAL:
                $isFinal = true;
                break;
            }
        }//end for

        return array(
                'is_abstract' => $isAbstract,
                'is_final'    => $isFinal,
               );

    }//end getClassProperties()


    /**
     * Determine if the passed token is a reference operator.
     *
     * Returns true if the specified token position represents a reference.
     * Returns false if the token represents a bitwise operator.
     *
     * @param int $stackPtr The position of the T_BITWISE_AND token.
     *
     * @return boolean
     */
    public function isReference($stackPtr)
    {
        if ($this->tokens[$stackPtr]['code'] !== T_BITWISE_AND) {
            return false;
        }

        $tokenBefore = $this->findPrevious(
            Util\Tokens::$emptyTokens,
            ($stackPtr - 1),
            null,
            true
        );

        if ($this->tokens[$tokenBefore]['code'] === T_FUNCTION) {
            // Function returns a reference.
            return true;
        }

        if ($this->tokens[$tokenBefore]['code'] === T_DOUBLE_ARROW) {
            // Inside a foreach loop, this is a reference.
            return true;
        }

        if ($this->tokens[$tokenBefore]['code'] === T_AS) {
            // Inside a foreach loop, this is a reference.
            return true;
        }

        if ($this->tokens[$tokenBefore]['code'] === T_OPEN_SHORT_ARRAY) {
            // Inside an array declaration, this is a reference.
            return true;
        }

        if (isset(Util\Tokens::$assignmentTokens[$this->tokens[$tokenBefore]['code']]) === true) {
            // This is directly after an assignment. It's a reference. Even if
            // it is part of an operation, the other tests will handle it.
            return true;
        }

        if (isset($this->tokens[$stackPtr]['nested_parenthesis']) === true) {
            $brackets    = $this->tokens[$stackPtr]['nested_parenthesis'];
            $lastBracket = array_pop($brackets);
            if (isset($this->tokens[$lastBracket]['parenthesis_owner']) === true) {
                $owner = $this->tokens[$this->tokens[$lastBracket]['parenthesis_owner']];
                if ($owner['code'] === T_FUNCTION
                    || $owner['code'] === T_CLOSURE
                    || $owner['code'] === T_ARRAY
                ) {
                    // Inside a function or array declaration, this is a reference.
                    return true;
                }
            } else {
                $prev = false;
                for ($t = ($this->tokens[$lastBracket]['parenthesis_opener'] - 1); $t >= 0; $t--) {
                    if ($this->tokens[$t]['code'] !== T_WHITESPACE) {
                        $prev = $t;
                        break;
                    }
                }

                if ($prev !== false && $this->tokens[$prev]['code'] === T_USE) {
                    return true;
                }
            }//end if
        }//end if

        $tokenAfter = $this->findNext(
            Util\Tokens::$emptyTokens,
            ($stackPtr + 1),
            null,
            true
        );

        if ($this->tokens[$tokenAfter]['code'] === T_VARIABLE
            && ($this->tokens[$tokenBefore]['code'] === T_OPEN_PARENTHESIS
            || $this->tokens[$tokenBefore]['code'] === T_COMMA)
        ) {
            return true;
        }

        return false;

    }//end isReference()


    /**
     * Returns the content of the tokens from the specified start position in
     * the token stack for the specified length.
     *
     * @param int $start  The position to start from in the token stack.
     * @param int $length The length of tokens to traverse from the start pos.
     *
     * @return string The token contents.
     */
    public function getTokensAsString($start, $length)
    {
        $str = '';
        $end = ($start + $length);
        if ($end > $this->numTokens) {
            $end = $this->numTokens;
        }

        for ($i = $start; $i < $end; $i++) {
            $str .= $this->tokens[$i]['content'];
        }

        return $str;

    }//end getTokensAsString()


    /**
     * Returns the position of the previous specified token(s).
     *
     * If a value is specified, the previous token of the specified type(s)
     * containing the specified value will be returned.
     *
     * Returns false if no token can be found.
     *
     * @param int|array $types   The type(s) of tokens to search for.
     * @param int       $start   The position to start searching from in the
     *                           token stack.
     * @param int       $end     The end position to fail if no token is found.
     *                           if not specified or null, end will default to
     *                           the start of the token stack.
     * @param bool      $exclude If true, find the previous token that is NOT of
     *                           the types specified in $types.
     * @param string    $value   The value that the token(s) must be equal to.
     *                           If value is omitted, tokens with any value will
     *                           be returned.
     * @param bool      $local   If true, tokens outside the current statement
     *                           will not be checked. IE. checking will stop
     *                           at the previous semi-colon found.
     *
     * @return int|bool
     * @see    findNext()
     */
    public function findPrevious(
        $types,
        $start,
        $end=null,
        $exclude=false,
        $value=null,
        $local=false
    ) {
        $types = (array) $types;

        if ($end === null) {
            $end = 0;
        }

        for ($i = $start; $i >= $end; $i--) {
            $found = (bool) $exclude;
            foreach ($types as $type) {

                if ($this->tokens[$i]['code'] === $type) {
                    $found = !$exclude;
                    break;
                }
            }

            if ($found === true) {

                if ($value === null) {
                    return $i;
                } else if ($this->tokens[$i]['content'] === $value) {
                    return $i;
                }
            }

            if ($local === true) {

                if (isset($this->tokens[$i]['scope_opener']) === true
                    && $i === $this->tokens[$i]['scope_closer']
                ) {
                    $i = $this->tokens[$i]['scope_opener'];
                } else if (isset($this->tokens[$i]['bracket_opener']) === true
                    && $i === $this->tokens[$i]['bracket_closer']
                ) {
                    $i = $this->tokens[$i]['bracket_opener'];
                } else if (isset($this->tokens[$i]['parenthesis_opener']) === true
                    && $i === $this->tokens[$i]['parenthesis_closer']
                ) {
                    $i = $this->tokens[$i]['parenthesis_opener'];
                } else if ($this->tokens[$i]['code'] === T_SEMICOLON) {
                    break;
                }
            }
        }//end for

        return false;

    }//end findPrevious()


    /**
     * Returns the position of the next specified token(s).
     *
     * If a value is specified, the next token of the specified type(s)
     * containing the specified value will be returned.
     *
     * Returns false if no token can be found.
     *
     * @param int|array $types   The type(s) of tokens to search for.
     * @param int       $start   The position to start searching from in the
     *                           token stack.
     * @param int       $end     The end position to fail if no token is found.
     *                           if not specified or null, end will default to
     *                           the end of the token stack.
     * @param bool      $exclude If true, find the next token that is NOT of
     *                           a type specified in $types.
     * @param string    $value   The value that the token(s) must be equal to.
     *                           If value is omitted, tokens with any value will
     *                           be returned.
     * @param bool      $local   If true, tokens outside the current statement
     *                           will not be checked. i.e., checking will stop
     *                           at the next semi-colon found.
     *
     * @return int|bool
     * @see    findPrevious()
     */
    public function findNext(
        $types,
        $start,
        $end=null,
        $exclude=false,
        $value=null,
        $local=false
    ) {
        $types = (array) $types;

        if ($end === null || $end > $this->numTokens) {
            $end = $this->numTokens;
        }

        for ($i = $start; $i < $end; $i++) {
            $found = (bool) $exclude;
            foreach ($types as $type) {

                if ($this->tokens[$i]['code'] === $type) {
                    $found = !$exclude;
                    break;
                }
            }

            if ($found === true) {

                if ($value === null) {
                    return $i;
                } else if ($this->tokens[$i]['content'] === $value) {
                    return $i;
                }
            }

            if ($local === true && $this->tokens[$i]['code'] === T_SEMICOLON) {
                break;
            }
        }//end for

        return false;

    }//end findNext()


    /**
     * Returns the position of the first non-whitespace token in a statement.
     *
     * @param int       $start  The position to start searching from in the token stack.
     * @param int|array $ignore Token types that should not be considered stop points.
     *
     * @return int
     */
    public function findStartOfStatement($start, $ignore=null)
    {
        $endTokens = Util\Tokens::$blockOpeners;

        $endTokens[T_COLON]            = true;
        $endTokens[T_COMMA]            = true;
        $endTokens[T_DOUBLE_ARROW]     = true;
        $endTokens[T_SEMICOLON]        = true;
        $endTokens[T_OPEN_TAG]         = true;
        $endTokens[T_CLOSE_TAG]        = true;
        $endTokens[T_OPEN_SHORT_ARRAY] = true;

        if ($ignore !== null) {

            $ignore = (array) $ignore;
            foreach ($ignore as $code) {
                if (isset($endTokens[$code]) === true) {
                    unset($endTokens[$code]);
                }
            }
        }

        $lastNotEmpty = $start;

        for ($i = $start; $i >= 0; $i--) {
            if (isset($endTokens[$this->tokens[$i]['code']]) === true) {
                // Found the end of the previous statement.
                return $lastNotEmpty;
            }

            if (isset($this->tokens[$i]['scope_opener']) === true

                && $i === $this->tokens[$i]['scope_closer']
            ) {
                // Found the end of the previous scope block.
                return $lastNotEmpty;
            }

            // Skip nested statements.
            if (isset($this->tokens[$i]['bracket_opener']) === true
                && $i === $this->tokens[$i]['bracket_closer']
            ) {
                $i = $this->tokens[$i]['bracket_opener'];
            } else if (isset($this->tokens[$i]['parenthesis_opener']) === true
                && $i === $this->tokens[$i]['parenthesis_closer']
            ) {
                $i = $this->tokens[$i]['parenthesis_opener'];
            }

            if (isset(Util\Tokens::$emptyTokens[$this->tokens[$i]['code']]) === false) {

                $lastNotEmpty = $i;
            }
        }//end for

        return 0;

    }//end findStartOfStatement()


    /**
     * Returns the position of the last non-whitespace token in a statement.
     *
     * @param int       $start  The position to start searching from in the token stack.
     * @param int|array $ignore Token types that should not be considered stop points.
     *
     * @return int
     */
    public function findEndOfStatement($start, $ignore=null)
    {
        $endTokens = array(
                      T_COLON                => true,
                      T_COMMA                => true,
                      T_DOUBLE_ARROW         => true,
                      T_SEMICOLON            => true,
                      T_CLOSE_PARENTHESIS    => true,
                      T_CLOSE_SQUARE_BRACKET => true,
                      T_CLOSE_CURLY_BRACKET  => true,
                      T_CLOSE_SHORT_ARRAY    => true,
                      T_OPEN_TAG             => true,
                      T_CLOSE_TAG            => true,
                     );

        if ($ignore !== null) {

            $ignore = (array) $ignore;
            foreach ($ignore as $code) {
                if (isset($endTokens[$code]) === true) {
                    unset($endTokens[$code]);
                }
            }
        }

        $lastNotEmpty = $start;

        for ($i = $start; $i < $this->numTokens; $i++) {
            if ($i !== $start && isset($endTokens[$this->tokens[$i]['code']]) === true) {
                // Found the end of the statement.
                if ($this->tokens[$i]['code'] === T_CLOSE_PARENTHESIS
                    || $this->tokens[$i]['code'] === T_CLOSE_SQUARE_BRACKET
                    || $this->tokens[$i]['code'] === T_CLOSE_CURLY_BRACKET
                    || $this->tokens[$i]['code'] === T_OPEN_TAG
                    || $this->tokens[$i]['code'] === T_CLOSE_TAG
                ) {
                    return $lastNotEmpty;
                }

                return $i;
            }

            // Skip nested statements.
            if (isset($this->tokens[$i]['scope_closer']) === true

                && ($i === $this->tokens[$i]['scope_opener']
                || $i === $this->tokens[$i]['scope_condition'])
            ) {
                $i = $this->tokens[$i]['scope_closer'];
            } else if (isset($this->tokens[$i]['bracket_closer']) === true
                && $i === $this->tokens[$i]['bracket_opener']
            ) {
                $i = $this->tokens[$i]['bracket_closer'];
            } else if (isset($this->tokens[$i]['parenthesis_closer']) === true
                && $i === $this->tokens[$i]['parenthesis_opener']
            ) {
                $i = $this->tokens[$i]['parenthesis_closer'];
            }

            if (isset(Util\Tokens::$emptyTokens[$this->tokens[$i]['code']]) === false) {

                $lastNotEmpty = $i;
            }
        }//end for

        return ($this->numTokens - 1);

    }//end findEndOfStatement()


    /**
     * Returns the position of the first token on a line, matching given type.
     *
     * Returns false if no token can be found.
     *
     * @param int|array $types   The type(s) of tokens to search for.
     * @param int       $start   The position to start searching from in the
     *                           token stack. The first token matching on
     *                           this line before this token will be returned.
     * @param bool      $exclude If true, find the token that is NOT of
     *                           the types specified in $types.
     * @param string    $value   The value that the token must be equal to.
     *                           If value is omitted, tokens with any value will
     *                           be returned.
     *
     * @return int | bool
     */
    public function findFirstOnLine($types, $start, $exclude=false, $value=null)
    {
        if (is_array($types) === false) {
            $types = array($types);
        }

        $foundToken = false;

        for ($i = $start; $i >= 0; $i--) {
            if ($this->tokens[$i]['line'] < $this->tokens[$start]['line']) {
                break;
            }

            $found = $exclude;
            foreach ($types as $type) {
                if ($exclude === false) {
                    if ($this->tokens[$i]['code'] === $type) {
                        $found = true;
                        break;
                    }
                } else {
                    if ($this->tokens[$i]['code'] === $type) {
                        $found = false;
                        break;
                    }
                }
            }

            if ($found === true) {
                if ($value === null) {
                    $foundToken = $i;
                } else if ($this->tokens[$i]['content'] === $value) {
                    $foundToken = $i;
                }
            }
        }//end for

        return $foundToken;

    }//end findFirstOnLine()


    /**
     * Determine if the passed token has a condition of one of the passed types.
     *
     * @param int       $stackPtr The position of the token we are checking.
     * @param int|array $types    The type(s) of tokens to search for.
     *
     * @return boolean
     */
    public function hasCondition($stackPtr, $types)
    {
        // Check for the existence of the token.
        if (isset($this->tokens[$stackPtr]) === false) {
            return false;
        }

        // Make sure the token has conditions.
        if (isset($this->tokens[$stackPtr]['conditions']) === false) {
            return false;
        }

        $types      = (array) $types;
        $conditions = $this->tokens[$stackPtr]['conditions'];

        foreach ($types as $type) {
            if (in_array($type, $conditions) === true) {
                // We found a token with the required type.
                return true;
            }
        }

        return false;

    }//end hasCondition()


    /**
     * Return the position of the condition for the passed token.
     *
     * Returns FALSE if the token does not have the condition.
     *
     * @param int $stackPtr The position of the token we are checking.
     * @param int $type     The type of token to search for.
     *
     * @return int
     */
    public function getCondition($stackPtr, $type)
    {
        // Check for the existence of the token.
        if (isset($this->tokens[$stackPtr]) === false) {
            return false;
        }

        // Make sure the token has conditions.
        if (isset($this->tokens[$stackPtr]['conditions']) === false) {
            return false;
        }

        $conditions = $this->tokens[$stackPtr]['conditions'];
        foreach ($conditions as $token => $condition) {
            if ($condition === $type) {
                return $token;
            }
        }

        return false;

    }//end getCondition()


    /**
     * Returns the name of the class that the specified class extends.
     *
     * Returns FALSE on error or if there is no extended class name.
     *
     * @param int $stackPtr The stack position of the class.
     *
     * @return string
     */
    public function findExtendedClassName($stackPtr)
    {
        // Check for the existence of the token.
        if (isset($this->tokens[$stackPtr]) === false) {
            return false;
        }

        if ($this->tokens[$stackPtr]['code'] !== T_CLASS) {
            return false;
        }

        if (isset($this->tokens[$stackPtr]['scope_closer']) === false) {
            return false;
        }

        $classCloserIndex = $this->tokens[$stackPtr]['scope_closer'];
        $extendsIndex     = $this->findNext(T_EXTENDS, $stackPtr, $classCloserIndex);
        if (false === $extendsIndex) {
            return false;
        }

        $find = array(
                 T_NS_SEPARATOR,
                 T_STRING,
                 T_WHITESPACE,
                );

        $end  = $this->findNext($find, ($extendsIndex + 1), $classCloserIndex, true);
        $name = $this->getTokensAsString(($extendsIndex + 1), ($end - $extendsIndex - 1));
        $name = trim($name);

        if ($name === '') {
            return false;
        }

        return $name;

    }//end findExtendedClassName()


}//end class

Symplify / PHP7_CodeSniffer
