<?php

> 


/**
 * SCSSPHP
 *

<  * @copyright 2012-2019 Leaf Corcoran



>  * @copyright 2012-2020 Leaf Corcoran


 *
 * @license http://opensource.org/licenses/MIT MIT
 *
 * @link http://scssphp.github.io/scssphp
 */

namespace ScssPhp\ScssPhp;


< use ScssPhp\ScssPhp\Block;
< use ScssPhp\ScssPhp\Cache;
< use ScssPhp\ScssPhp\Compiler;



> use ScssPhp\ScssPhp\Block\AtRootBlock;
> use ScssPhp\ScssPhp\Block\CallableBlock;
> use ScssPhp\ScssPhp\Block\ContentBlock;
> use ScssPhp\ScssPhp\Block\DirectiveBlock;
> use ScssPhp\ScssPhp\Block\EachBlock;
> use ScssPhp\ScssPhp\Block\ElseBlock;
> use ScssPhp\ScssPhp\Block\ElseifBlock;
> use ScssPhp\ScssPhp\Block\ForBlock;
> use ScssPhp\ScssPhp\Block\IfBlock;
> use ScssPhp\ScssPhp\Block\MediaBlock;
> use ScssPhp\ScssPhp\Block\NestedPropertyBlock;
> use ScssPhp\ScssPhp\Block\WhileBlock;


use ScssPhp\ScssPhp\Exception\ParserException;

< use ScssPhp\ScssPhp\Node;
< use ScssPhp\ScssPhp\Type;



> use ScssPhp\ScssPhp\Logger\LoggerInterface;
> use ScssPhp\ScssPhp\Logger\QuietLogger;



/**
 * Parser
 *
 * @author Leaf Corcoran <leafot@gmail.com>

>  *
 */
>  * @internal


class Parser
{
    const SOURCE_INDEX  = -1;
    const SOURCE_LINE   = -2;
    const SOURCE_COLUMN = -3;

    /**

<      * @var array



>      * @var array<string, int>


     */
    protected static $precedence = [
        '='   => 0,
        'or'  => 1,
        'and' => 2,
        '=='  => 3,
        '!='  => 3,

<         '<=>' => 3,


        '<='  => 4,
        '>='  => 4,
        '<'   => 4,
        '>'   => 4,
        '+'   => 5,
        '-'   => 5,
        '*'   => 6,
        '/'   => 6,
        '%'   => 6,
    ];


>     /**
    protected static $commentPattern;
>      * @var string
    protected static $operatorPattern;
>      */


    protected static $whitePattern;

>     /**

>      * @var string
    protected $cache;
>      */




>     /**
    private $sourceName;
>      * @var string
    private $sourceIndex;
>      */


    private $sourcePositions;

>     /**
    private $charset;
>      * @var Cache|null
    private $count;
>      */


    private $env;

>     /**
    private $inParens;
>      * @var array<int, int>
    private $eatWhiteDefault;
>      */


    private $discardComments;

>     /**
    private $buffer;
>      * @var array|null
    private $utf8;
>      */


    private $encoding;

>     /**
    private $patternModifiers;
>      * The current offset in the buffer
    private $commentsSeen;
>      *

>      * @var int
    /**
>      */


     * Constructor

>     /**
     *
>      * @var Block|null
     * @api
>      */


     *

>     /**
     * @param string                 $sourceName
>      * @var bool
     * @param integer                $sourceIndex
>      */


     * @param string                 $encoding

>     /**
     * @param \ScssPhp\ScssPhp\Cache $cache
>      * @var bool
     */
>      */


    public function __construct($sourceName, $sourceIndex = 0, $encoding = 'utf-8', $cache = null)

>     /**
    {
>      * @var bool
        $this->sourceName       = $sourceName ?: '(stdin)';
>      */


        $this->sourceIndex      = $sourceIndex;

>     private $allowVars;
        $this->charset          = null;
>     /**
        $this->utf8             = ! $encoding || strtolower($encoding) === 'utf-8';
>      * @var string
        $this->patternModifiers = $this->utf8 ? 'Aisu' : 'Ais';
>      */


        $this->commentsSeen     = [];

>     /**
        $this->discardComments  = false;
>      * @var string|null

>      */


        if (empty(static::$operatorPattern)) {

>     private $cssOnly;
            static::$operatorPattern = '([*\/%+-]|[!=]\=|\>\=?|\<\=\>|\<\=?|and|or)';
> 

>     /**
            $commentSingle      = '\/\/';
>      * @var LoggerInterface
            $commentMultiLeft   = '\/\*';
>      */
            $commentMultiRight  = '\*\/';
>     private $logger;

> 



<      * @param string                 $sourceName
<      * @param integer                $sourceIndex
<      * @param string                 $encoding
<      * @param \ScssPhp\ScssPhp\Cache $cache



>      * @param string|null          $sourceName
>      * @param int                  $sourceIndex
>      * @param string|null          $encoding
>      * @param Cache|null           $cache
>      * @param bool                 $cssOnly
>      * @param LoggerInterface|null $logger



<     public function __construct($sourceName, $sourceIndex = 0, $encoding = 'utf-8', $cache = null)



>     public function __construct($sourceName, $sourceIndex = 0, $encoding = 'utf-8', Cache $cache = null, $cssOnly = false, LoggerInterface $logger = null)



<         $this->discardComments  = false;



>         $this->commentsSeen     = [];
>         $this->allowVars        = true;
>         $this->cssOnly          = $cssOnly;
>         $this->logger = $logger ?: new QuietLogger();



<             static::$operatorPattern = '([*\/%+-]|[!=]\=|\>\=?|\<\=\>|\<\=?|and|or)';



>             static::$operatorPattern = '([*\/%+-]|[!=]\=|\>\=?|\<\=?|and|or)';



<         if ($cache) {


        }

<     }



    /**
     * Get source file name
     *
     * @api
     *
     * @return string
     */
    public function getSourceName()
    {
        return $this->sourceName;
    }

    /**
     * Throw parser error
     *
     * @api
     *
     * @param string $msg
     *

<      * @throws \ScssPhp\ScssPhp\Exception\ParserException



>      * @phpstan-return never-return
>      *
>      * @throws ParserException
>      *
>      * @deprecated use "parseError" and throw the exception in the caller instead.


     */
    public function throwParseError($msg = 'parse error')
    {

>         @trigger_error(
        list($line, $column) = $this->getSourcePosition($this->count);
>             'The method "throwParseError" is deprecated. Use "parseError" and throw the exception in the caller instead',

>             E_USER_DEPRECATED
        $loc = empty($this->sourceName)
>         );
             ? "line: $line, column: $column"
> 
             : "$this->sourceName on line $line, at column $column";
>         throw $this->parseError($msg);

>     }
        if ($this->peek("(.*?)(\n|$)", $m, $this->count)) {
> 
            throw new ParserException("$msg: failed at `$m[1]` $loc");
>     /**
        }
>      * Creates a parser error

>      *
        throw new ParserException("$msg: $loc");
>      * @api
    }
>      *

>      * @param string $msg
    /**
>      *
     * Parser buffer
>      * @return ParserException
     *
>      */
     * @api
>     public function parseError($msg = 'parse error')
     *
>     {



<         if ($this->peek("(.*?)(\n|$)", $m, $this->count)) {
<             throw new ParserException("$msg: failed at `$m[1]` $loc");



>         if ($this->peek('(.*?)(\n|$)', $m, $this->count)) {
>             $this->restoreEncoding();
> 
>             $e = new ParserException("$msg: failed at `$m[1]` $loc");
>             $e->setSourcePosition([$this->sourceName, $line, $column]);
> 
>             return $e;



<         throw new ParserException("$msg: $loc");



>         $this->restoreEncoding();
> 
>         $e = new ParserException("$msg: $loc");
>         $e->setSourcePosition([$this->sourceName, $line, $column]);
> 
>         return $e;



<      * @return \ScssPhp\ScssPhp\Block



>      * @return Block


    public function parse($buffer)
    {
        if ($this->cache) {

<             $cacheKey = $this->sourceName . ":" . md5($buffer);



>             $cacheKey = $this->sourceName . ':' . md5($buffer);


            $parseOptions = [
                'charset' => $this->charset,
                'utf8' => $this->utf8,
            ];

<             $v = $this->cache->getCache("parse", $cacheKey, $parseOptions);



>             $v = $this->cache->getCache('parse', $cacheKey, $parseOptions);




<             if (! is_null($v)) {



>             if (! \is_null($v)) {


                return $v;
            }
        }

        // strip BOM (byte order marker)
        if (substr($buffer, 0, 3) === "\xef\xbb\xbf") {
            $buffer = substr($buffer, 3);
        }

        $this->buffer          = rtrim($buffer, "\x00..\x1f");
        $this->count           = 0;
        $this->env             = null;
        $this->inParens        = false;
        $this->eatWhiteDefault = true;

        $this->saveEncoding();
        $this->extractLineNumbers($buffer);

        $this->pushBlock(null); // root block
        $this->whitespace();
        $this->pushBlock(null);
        $this->popBlock();

        while ($this->parseChunk()) {
            ;
        }


<         if ($this->count !== strlen($this->buffer)) {
<             $this->throwParseError();



>         if ($this->count !== \strlen($this->buffer)) {
>             throw $this->parseError();


        }

        if (! empty($this->env->parent)) {

<             $this->throwParseError('unclosed block');



>             throw $this->parseError('unclosed block');


        }

        if ($this->charset) {
            array_unshift($this->env->children, $this->charset);
        }

        $this->restoreEncoding();

        if ($this->cache) {

<             $this->cache->setCache("parse", $cacheKey, $this->env, $parseOptions);



>             $this->cache->setCache('parse', $cacheKey, $this->env, $parseOptions);


        }

        return $this->env;
    }

    /**
     * Parse a value or value list
     *
     * @api
     *
     * @param string       $buffer
     * @param string|array $out
     *

<      * @return boolean



>      * @return bool


     */
    public function parseValue($buffer, &$out)
    {
        $this->count           = 0;
        $this->env             = null;
        $this->inParens        = false;
        $this->eatWhiteDefault = true;
        $this->buffer          = (string) $buffer;

        $this->saveEncoding();

>         $this->extractLineNumbers($this->buffer);



        $list = $this->valueList($out);

        $this->restoreEncoding();

        return $list;
    }

    /**
     * Parse a selector or selector list
     *
     * @api
     *
     * @param string       $buffer
     * @param string|array $out

>      * @param bool         $shouldValidate


     *

<      * @return boolean



>      * @return bool


     */

<     public function parseSelector($buffer, &$out)



>     public function parseSelector($buffer, &$out, $shouldValidate = true)


    {
        $this->count           = 0;
        $this->env             = null;
        $this->inParens        = false;
        $this->eatWhiteDefault = true;
        $this->buffer          = (string) $buffer;

        $this->saveEncoding();

>         $this->extractLineNumbers($this->buffer);

> 
        $selector = $this->selectors($out);
>         // discard space/comments at the start

>         $this->discardComments = true;
        $this->restoreEncoding();
>         $this->whitespace();

>         $this->discardComments = false;


        return $selector;

>         if ($shouldValidate && $this->count !== strlen($buffer)) {
    }
>             throw $this->parseError("`" . substr($buffer, $this->count) . "` is not a valid Selector in `$buffer`");

>         }
    /**
> 


     * Parse a media Query
     *
     * @api
     *
     * @param string       $buffer
     * @param string|array $out
     *

<      * @return boolean



>      * @return bool


     */
    public function parseMediaQueryList($buffer, &$out)
    {
        $this->count           = 0;
        $this->env             = null;
        $this->inParens        = false;
        $this->eatWhiteDefault = true;
        $this->buffer          = (string) $buffer;

        $this->saveEncoding();

>         $this->extractLineNumbers($this->buffer);



        $isMediaQuery = $this->mediaQueryList($out);

        $this->restoreEncoding();

        return $isMediaQuery;
    }

    /**
     * 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 Compiler::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 Compiler::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, Compiler::seek() is used to remember and set buffer positions.
     *
     * Before parsing a chain, use $s = $this->count to remember the current
     * position into $s. Then if a chain fails, use $this->seek($s) to
     * go back where we started.
     *

<      * @return boolean



>      * @return bool


     */
    protected function parseChunk()
    {
        $s = $this->count;

        // the directives
        if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] === '@') {

<             if ($this->literal('@at-root', 8) &&



>             if (
>                 $this->literal('@at-root', 8) &&


                ($this->selectors($selector) || true) &&
                ($this->map($with) || true) &&

<                 (($this->matchChar('(')
<                     && $this->interpolation($with)
<                     && $this->matchChar(')')) || true) &&



>                 (($this->matchChar('(') &&
>                     $this->interpolation($with) &&
>                     $this->matchChar(')')) || true) &&


                $this->matchChar('{', false)
            ) {

<                 $atRoot = $this->pushSpecialBlock(Type::T_AT_ROOT, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 $atRoot = new AtRootBlock();
>                 $this->registerPushedBlock($atRoot, $s);


                $atRoot->selector = $selector;
                $atRoot->with     = $with;

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@media', 6) && $this->mediaQueryList($mediaQueryList) && $this->matchChar('{', false)) {
<                 $media = $this->pushSpecialBlock(Type::T_MEDIA, $s);



>             if (
>                 $this->literal('@media', 6) &&
>                 $this->mediaQueryList($mediaQueryList) &&
>                 $this->matchChar('{', false)
>             ) {
>                 $media = new MediaBlock();
>                 $this->registerPushedBlock($media, $s);


                $media->queryList = $mediaQueryList[2];

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@mixin', 6) &&



>             if (
>                 $this->literal('@mixin', 6) &&


                $this->keyword($mixinName) &&
                ($this->argumentDef($args) || true) &&
                $this->matchChar('{', false)
            ) {

<                 $mixin = $this->pushSpecialBlock(Type::T_MIXIN, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 $mixin = new CallableBlock(Type::T_MIXIN);
>                 $this->registerPushedBlock($mixin, $s);


                $mixin->name = $mixinName;
                $mixin->args = $args;

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@include', 8) &&



>             if (
>                 ($this->literal('@include', 8) &&


                $this->keyword($mixinName) &&
                ($this->matchChar('(') &&
                    ($this->argValues($argValues) || true) &&
                    $this->matchChar(')') || true) &&

<                 ($this->end() ||



>                     ($this->end()) ||


                    ($this->literal('using', 5) &&
                        $this->argumentDef($argUsing) &&
                        ($this->end() || $this->matchChar('{') && $hasBlock = true)) ||
                    $this->matchChar('{') && $hasBlock = true)
            ) {

>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
                $child = [
> 


                    Type::T_INCLUDE,
                    $mixinName,
                    isset($argValues) ? $argValues : null,
                    null,
                    isset($argUsing) ? $argUsing : null
                ];

                if (! empty($hasBlock)) {

<                     $include = $this->pushSpecialBlock(Type::T_INCLUDE, $s);



>                     $include = new ContentBlock();
>                     $this->registerPushedBlock($include, $s);


                    $include->child = $child;
                } else {
                    $this->append($child, $s);
                }

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@scssphp-import-once', 20) &&



>             if (
>                 $this->literal('@scssphp-import-once', 20) &&


                $this->valueList($importPath) &&
                $this->end()
            ) {

>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
                $this->append([Type::T_SCSSPHP_IMPORT_ONCE, $importPath], $s);
> 

>                 list($line, $column) = $this->getSourcePosition($s);
                return true;
>                 $file = $this->sourceName;
            }
>                 $this->logger->warn("The \"@scssphp-import-once\" directive is deprecated and will be removed in ScssPhp 2.0, in \"$file\", line $line, column $column.", true);

> 


            $this->seek($s);


<             if ($this->literal('@import', 7) &&



>             if (
>                 $this->literal('@import', 7) &&


                $this->valueList($importPath) &&

>                 $importPath[0] !== Type::T_FUNCTION_CALL &&


                $this->end()
            ) {

>                 if ($this->cssOnly) {
                $this->append([Type::T_IMPORT, $importPath], $s);
>                     $this->assertPlainCssValid([Type::T_IMPORT, $importPath], $s);

>                     $this->append([Type::T_COMMENT, rtrim(substr($this->buffer, $s, $this->count - $s))]);
                return true;
>                     return true;
            }
>                 }

> 


            $this->seek($s);


<             if ($this->literal('@import', 7) &&



>             if (
>                 $this->literal('@import', 7) &&


                $this->url($importPath) &&
                $this->end()
            ) {

>                 if ($this->cssOnly) {
                $this->append([Type::T_IMPORT, $importPath], $s);
>                     $this->assertPlainCssValid([Type::T_IMPORT, $importPath], $s);

>                     $this->append([Type::T_COMMENT, rtrim(substr($this->buffer, $s, $this->count - $s))]);
                return true;
>                     return true;
            }
>                 }

> 


            $this->seek($s);


<             if ($this->literal('@extend', 7) &&



>             if (
>                 $this->literal('@extend', 7) &&


                $this->selectors($selectors) &&
                $this->end()
            ) {

>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
                // check for '!flag'
> 


                $optional = $this->stripOptionalFlag($selectors);
                $this->append([Type::T_EXTEND, $selectors, $optional], $s);

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@function', 9) &&



>             if (
>                 $this->literal('@function', 9) &&


                $this->keyword($fnName) &&
                $this->argumentDef($args) &&
                $this->matchChar('{', false)
            ) {

<                 $func = $this->pushSpecialBlock(Type::T_FUNCTION, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 $func = new CallableBlock(Type::T_FUNCTION);
>                 $this->registerPushedBlock($func, $s);


                $func->name = $fnName;
                $func->args = $args;

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@break', 6) && $this->end()) {
<                 $this->append([Type::T_BREAK], $s);
< 
<                 return true;
<             }
< 
<             $this->seek($s);
< 
<             if ($this->literal('@continue', 9) && $this->end()) {
<                 $this->append([Type::T_CONTINUE], $s);
< 
<                 return true;
<             }
< 
<             $this->seek($s);



>             if (
>                 $this->literal('@return', 7) &&
>                 ($this->valueList($retVal) || true) &&
>                 $this->end()
>             ) {
>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);




<             if ($this->literal('@return', 7) && ($this->valueList($retVal) || true) && $this->end()) {


                $this->append([Type::T_RETURN, isset($retVal) ? $retVal : [Type::T_NULL]], $s);

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@each', 5) &&



>             if (
>                 $this->literal('@each', 5) &&


                $this->genericList($varNames, 'variable', ',', false) &&
                $this->literal('in', 2) &&
                $this->valueList($list) &&
                $this->matchChar('{', false)
            ) {

<                 $each = $this->pushSpecialBlock(Type::T_EACH, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 $each = new EachBlock();
>                 $this->registerPushedBlock($each, $s);



                foreach ($varNames[2] as $varName) {
                    $each->vars[] = $varName[1];
                }

                $each->list = $list;

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@while', 6) &&



>             if (
>                 $this->literal('@while', 6) &&


                $this->expression($cond) &&
                $this->matchChar('{', false)
            ) {

<                 $while = $this->pushSpecialBlock(Type::T_WHILE, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 while (
>                     $cond[0] === Type::T_LIST &&
>                     ! empty($cond['enclosing']) &&
>                     $cond['enclosing'] === 'parent' &&
>                     \count($cond[2]) == 1
>                 ) {
>                     $cond = reset($cond[2]);
>                 }
> 
>                 $while = new WhileBlock();
>                 $this->registerPushedBlock($while, $s);


                $while->cond = $cond;

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@for', 4) &&



>             if (
>                 $this->literal('@for', 4) &&


                $this->variable($varName) &&
                $this->literal('from', 4) &&
                $this->expression($start) &&
                ($this->literal('through', 7) ||
                    ($forUntil = true && $this->literal('to', 2))) &&
                $this->expression($end) &&
                $this->matchChar('{', false)
            ) {

<                 $for = $this->pushSpecialBlock(Type::T_FOR, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 $for = new ForBlock();
>                 $this->registerPushedBlock($for, $s);


                $for->var   = $varName[1];
                $for->start = $start;
                $for->end   = $end;
                $for->until = isset($forUntil);

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@if', 3) && $this->valueList($cond) && $this->matchChar('{', false)) {
<                 $if = $this->pushSpecialBlock(Type::T_IF, $s);
<                 while ($cond[0] === Type::T_LIST
<                     && !empty($cond['enclosing'])
<                     && $cond['enclosing'] === 'parent'
<                     && count($cond[2]) == 1) {



>             if (
>                 $this->literal('@if', 3) &&
>                 $this->functionCallArgumentsList($cond, false, '{', false)
>             ) {
>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 
>                 $if = new IfBlock();
>                 $this->registerPushedBlock($if, $s);
> 
>                 while (
>                     $cond[0] === Type::T_LIST &&
>                     ! empty($cond['enclosing']) &&
>                     $cond['enclosing'] === 'parent' &&
>                     \count($cond[2]) == 1
>                 ) {


                    $cond = reset($cond[2]);
                }

> 


                $if->cond  = $cond;
                $if->cases = [];

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@debug', 6) &&
<                 $this->valueList($value) &&
<                 $this->end()



>             if (
>                 $this->literal('@debug', 6) &&
>                 $this->functionCallArgumentsList($value, false)


            ) {

>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
                $this->append([Type::T_DEBUG, $value], $s);
> 



                return true;
            }

            $this->seek($s);


<             if ($this->literal('@warn', 5) &&
<                 $this->valueList($value) &&
<                 $this->end()



>             if (
>                 $this->literal('@warn', 5) &&
>                 $this->functionCallArgumentsList($value, false)


            ) {

>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
                $this->append([Type::T_WARN, $value], $s);
> 



                return true;
            }

            $this->seek($s);


<             if ($this->literal('@error', 6) &&
<                 $this->valueList($value) &&
<                 $this->end()



>             if (
>                 $this->literal('@error', 6) &&
>                 $this->functionCallArgumentsList($value, false)


            ) {

>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
                $this->append([Type::T_ERROR, $value], $s);
> 



                return true;
            }

            $this->seek($s);


<             #if ($this->literal('@content', 8))
< 
<             if ($this->literal('@content', 8) &&



>             if (
>                 $this->literal('@content', 8) &&


                ($this->end() ||
                    $this->matchChar('(') &&
                        $this->argValues($argContent) &&
                        $this->matchChar(')') &&

<                     $this->end())) {



>                     $this->end())
>             ) {
>                 ! $this->cssOnly || $this->assertPlainCssValid(false, $s);
> 


                $this->append([Type::T_MIXIN_CONTENT, isset($argContent) ? $argContent : null], $s);

                return true;
            }

            $this->seek($s);

            $last = $this->last();

            if (isset($last) && $last[0] === Type::T_IF) {
                list(, $if) = $last;

>                 assert($if instanceof IfBlock);



                if ($this->literal('@else', 5)) {
                    if ($this->matchChar('{', false)) {

<                         $else = $this->pushSpecialBlock(Type::T_ELSE, $s);
<                     } elseif ($this->literal('if', 2) && $this->valueList($cond) && $this->matchChar('{', false)) {
<                         $else = $this->pushSpecialBlock(Type::T_ELSEIF, $s);



>                         $else = new ElseBlock();
>                     } elseif (
>                         $this->literal('if', 2) &&
>                         $this->functionCallArgumentsList($cond, false, '{', false)
>                     ) {
>                         $else = new ElseifBlock();


                        $else->cond = $cond;
                    }

                    if (isset($else)) {

<                         $else->dontAppend = true;



>                         $this->registerPushedBlock($else, $s);


                        $if->cases[] = $else;

                        return true;
                    }
                }

                $this->seek($s);
            }

            // only retain the first @charset directive encountered

<             if ($this->literal('@charset', 8) &&



>             if (
>                 $this->literal('@charset', 8) &&


                $this->valueList($charset) &&
                $this->end()
            ) {
                if (! isset($this->charset)) {
                    $statement = [Type::T_CHARSET, $charset];

                    list($line, $column) = $this->getSourcePosition($s);

                    $statement[static::SOURCE_LINE]   = $line;
                    $statement[static::SOURCE_COLUMN] = $column;
                    $statement[static::SOURCE_INDEX]  = $this->sourceIndex;

                    $this->charset = $statement;
                }

                return true;
            }

            $this->seek($s);


<             if ($this->literal('@supports', 9) &&



>             if (
>                 $this->literal('@supports', 9) &&


                ($t1=$this->supportsQuery($supportQuery)) &&
                ($t2=$this->matchChar('{', false))
            ) {

<                 $directive = $this->pushSpecialBlock(Type::T_DIRECTIVE, $s);



>                 $directive = new DirectiveBlock();
>                 $this->registerPushedBlock($directive, $s);


                $directive->name  = 'supports';
                $directive->value = $supportQuery;

                return true;
            }

            $this->seek($s);

            // doesn't match built in directive, do generic one

<             if ($this->matchChar('@', false) &&
<                 $this->keyword($dirName) &&
<                 ($this->variable($dirValue) || $this->openString('{', $dirValue) || true) &&
<                 $this->matchChar('{', false)



>             if (
>                 $this->matchChar('@', false) &&
>                 $this->mixedKeyword($dirName) &&
>                 $this->directiveValue($dirValue, '{')


            ) {

>                 if (count($dirName) === 1 && is_string(reset($dirName))) {
                if ($dirName === 'media') {
>                     $dirName = reset($dirName);
                    $directive = $this->pushSpecialBlock(Type::T_MEDIA, $s);
>                 } else {
                } else {
>                     $dirName = [Type::T_STRING, '', $dirName];
                    $directive = $this->pushSpecialBlock(Type::T_DIRECTIVE, $s);
>                 }



<                     $directive = $this->pushSpecialBlock(Type::T_MEDIA, $s);



>                     $directive = new MediaBlock();



<                     $directive = $this->pushSpecialBlock(Type::T_DIRECTIVE, $s);



>                     $directive = new DirectiveBlock();




>                 $this->registerPushedBlock($directive, $s);


                if (isset($dirValue)) {

>                     ! $this->cssOnly || ($dirValue = $this->assertPlainCssValid($dirValue));


                    $directive->value = $dirValue;
                }

                return true;
            }

            $this->seek($s);

            // maybe it's a generic blockless directive

<             if ($this->matchChar('@', false) &&
<                 $this->keyword($dirName) &&
<                 $this->valueList($dirValue) &&
<                 $this->end()



>             if (
>                 $this->matchChar('@', false) &&
>                 $this->mixedKeyword($dirName) &&
>                 ! $this->isKnownGenericDirective($dirName) &&
>                 ($this->end(false) || ($this->directiveValue($dirValue, '') && $this->end(false)))


            ) {

<                 $this->append([Type::T_DIRECTIVE, [$dirName, $dirValue]], $s);



>                 if (\count($dirName) === 1 && \is_string(\reset($dirName))) {
>                     $dirName = \reset($dirName);
>                 } else {
>                     $dirName = [Type::T_STRING, '', $dirName];
>                 }
>                 if (
>                     ! empty($this->env->parent) &&
>                     $this->env->type &&
>                     ! \in_array($this->env->type, [Type::T_DIRECTIVE, Type::T_MEDIA])
>                 ) {
>                     $plain = \trim(\substr($this->buffer, $s, $this->count - $s));
>                     throw $this->parseError(
>                         "Unknown directive `{$plain}` not allowed in `" . $this->env->type . "` block"
>                     );
>                 }
>                 // blockless directives with a blank line after keeps their blank lines after
>                 // sass-spec compliance purpose
>                 $s = $this->count;
>                 $hasBlankLine = false;
>                 if ($this->match('\s*?\n\s*\n', $out, false)) {
>                     $hasBlankLine = true;
>                     $this->seek($s);
>                 }
>                 $isNotRoot = ! empty($this->env->parent);
>                 $this->append([Type::T_DIRECTIVE, [$dirName, $dirValue, $hasBlankLine, $isNotRoot]], $s);
>                 $this->whitespace();



                return true;
            }

            $this->seek($s);

            return false;
        }


>         $inCssSelector = null;
        // property shortcut
>         if ($this->cssOnly) {
        // captures most properties before having to parse a selector
>             $inCssSelector = (! empty($this->env->parent) &&
        if ($this->keyword($name, false) &&
>                 ! in_array($this->env->type, [Type::T_DIRECTIVE, Type::T_MEDIA]));
            $this->literal(': ', 2) &&
>         }
            $this->valueList($value) &&
>         // custom properties : right part is static
            $this->end()
>         if (($this->customProperty($name) ) && $this->matchChar(':', false)) {
        ) {
>             $start = $this->count;
            $name = [Type::T_STRING, '', [$name]];
> 
            $this->append([Type::T_ASSIGN, $name, $value], $s);
>             // but can be complex and finish with ; or }

>             foreach ([';','}'] as $ending) {
            return true;
>                 if (
        }
>                     $this->openString($ending, $stringValue, '(', ')', false) &&

>                     $this->end()
        $this->seek($s);
>                 ) {

>                     $end = $this->count;
        // variable assigns
>                     $value = $stringValue;
        if ($this->variable($name) &&
> 
            $this->matchChar(':') &&
>                     // check if we have only a partial value due to nested [] or { } to take in account
            $this->valueList($value) &&
>                     $nestingPairs = [['[', ']'], ['{', '}']];
            $this->end()
> 
        ) {
>                     foreach ($nestingPairs as $nestingPair) {
            // check for '!flag'
>                         $p = strpos($this->buffer, $nestingPair[0], $start);
            $assignmentFlags = $this->stripAssignmentFlags($value);
> 
            $this->append([Type::T_ASSIGN, $name, $value, $assignmentFlags], $s);
>                         if ($p && $p < $end) {

>                             $this->seek($start);
            return true;
> 
        }
>                             if (

>                                 $this->openString($ending, $stringValue, $nestingPair[0], $nestingPair[1], false) &&
        $this->seek($s);
>                                 $this->end() &&

>                                 $this->count > $end
        // misc
>                             ) {
        if ($this->literal('-->', 3)) {
>                                 $end = $this->count;
            return true;
>                                 $value = $stringValue;
        }
>                             }

>                         }
        // opening css block
>                     }
        if ($this->selectors($selectors) && $this->matchChar('{', false)) {
> 
            $this->pushBlock($selectors, $s);
>                     $this->seek($end);

>                     $this->append([Type::T_CUSTOM_PROPERTY, $name, $value], $s);
            if ($this->eatWhiteDefault) {
> 
                $this->whitespace();
>                     return true;
                $this->append(null); // collect comments at the beginning if needed
>                 }
            }
>             }

> 
            return true;
>             // TODO: output an error here if nothing found according to sass spec
        }
>         }

> 
        $this->seek($s);
>         $this->seek($s);

> 



<         if ($this->keyword($name, false) &&



>         if (
>             $this->keyword($name, false) &&



<         if ($this->variable($name) &&



>         if (
>             $this->variable($name) &&


            $foundSomething = false;

>             ! $this->cssOnly || $this->assertPlainCssValid(false, $s);

> 



<         // misc
<         if ($this->literal('-->', 3)) {
<             return true;
<         }
< 



<         if ($this->selectors($selectors) && $this->matchChar('{', false)) {



>         if (
>             $this->selectors($selectors) &&
>             $this->matchChar('{', false)
>         ) {
>             ! $this->cssOnly || ! $inCssSelector || $this->assertPlainCssValid(false);
> 



<         if ($this->propertyName($name) && $this->matchChar(':')) {



>         if (
>             $this->propertyName($name) &&
>             $this->matchChar(':')
>         ) {



<                     $this->throwParseError('expected "{"');



>                     throw $this->parseError('expected "{"');



            if ($this->matchChar('{', false)) {

<                 $propBlock = $this->pushSpecialBlock(Type::T_NESTED_PROPERTY, $s);



>                 ! $this->cssOnly || $this->assertPlainCssValid(false);
> 
>                 $propBlock = new NestedPropertyBlock();
>                 $this->registerPushedBlock($propBlock, $s);


                $propBlock->prefix = $name;
                $propBlock->hasValue = $foundSomething;

                $foundSomething = true;
            } elseif ($foundSomething) {
                $foundSomething = $this->end();
            }

            if ($foundSomething) {
                return true;
            }
        }

        $this->seek($s);

        // closing a block
        if ($this->matchChar('}', false)) {
            $block = $this->popBlock();

            if (! isset($block->type) || $block->type !== Type::T_IF) {
                if ($this->env->parent) {
                    $this->append(null); // collect comments before next statement if needed
                }
            }


<             if (isset($block->type) && $block->type === Type::T_INCLUDE) {



>             if ($block instanceof ContentBlock) {


                $include = $block->child;

>                 assert(\is_array($include));


                unset($block->child);
                $include[3] = $block;
                $this->append($include, $s);

<             } elseif (empty($block->dontAppend)) {



>             } elseif (!$block instanceof ElseBlock && !$block instanceof ElseifBlock) {


                $type = isset($block->type) ? $block->type : Type::T_BLOCK;
                $this->append([$type, $block], $s);
            }

            // collect comments just after the block closing if needed
            if ($this->eatWhiteDefault) {
                $this->whitespace();

                if ($this->env->comments) {
                    $this->append(null);
                }
            }

            return true;
        }

        // extra stuff

<         if ($this->matchChar(';') ||
<             $this->literal('<!--', 4)
<         ) {



>         if ($this->matchChar(';')) {


            return true;
        }

        return false;
    }

    /**
     * Push block onto parse tree
     *

<      * @param array   $selectors
<      * @param integer $pos



>      * @param array|null $selectors
>      * @param int        $pos


     *

<      * @return \ScssPhp\ScssPhp\Block



>      * @return Block


     */
    protected function pushBlock($selectors, $pos = 0)
    {

>         $b = new Block();
        list($line, $column) = $this->getSourcePosition($pos);
>         $b->selectors = $selectors;

> 
        $b = new Block;
>         $this->registerPushedBlock($b, $pos);
        $b->sourceName   = $this->sourceName;
> 
        $b->sourceLine   = $line;
>         return $b;
        $b->sourceColumn = $column;
>     }
        $b->sourceIndex  = $this->sourceIndex;
> 
        $b->selectors    = $selectors;
>     /**
        $b->comments     = [];
>      * @param Block $b
        $b->parent       = $this->env;
>      * @param int   $pos

>      *
        if (! $this->env) {
>      * @return void
            $b->children = [];
>      */
        } elseif (empty($this->env->children)) {
>     private function registerPushedBlock(Block $b, $pos)
            $this->env->children = $this->env->comments;
>     {



<         $b = new Block;



<         $b->selectors    = $selectors;


        } else {
            $b->children = $this->env->comments;
            $this->env->comments = [];
        }

        $this->env = $b;

        // collect comments at the beginning of a block if needed
        if ($this->eatWhiteDefault) {
            $this->whitespace();

            if ($this->env->comments) {
                $this->append(null);
            }
        }

< 
<         return $b;


    }

    /**
     * Push special (named) block onto parse tree
     *

>      * @deprecated
     * @param string  $type
>      *



<      * @param integer $pos



>      * @param int     $pos


     *

<      * @return \ScssPhp\ScssPhp\Block



>      * @return Block


     */
    protected function pushSpecialBlock($type, $pos)
    {
        $block = $this->pushBlock(null, $pos);
        $block->type = $type;

        return $block;
    }

    /**
     * Pop scope and return last block
     *

<      * @return \ScssPhp\ScssPhp\Block



>      * @return Block


     *
     * @throws \Exception
     */
    protected function popBlock()
    {

        // collect comments ending just before of a block closing
        if ($this->env->comments) {
            $this->append(null);
        }

        // pop the block
        $block = $this->env;

        if (empty($block->parent)) {

<             $this->throwParseError('unexpected }');



>             throw $this->parseError('unexpected }');


        }

        if ($block->type == Type::T_AT_ROOT) {
            // keeps the parent in case of self selector &
            $block->selfParent = $block->parent;
        }

        $this->env = $block->parent;

        unset($block->parent);

        return $block;
    }

    /**
     * Peek input stream
     *
     * @param string  $regex
     * @param array   $out

<      * @param integer $from



>      * @param int    $from


     *

<      * @return integer



>      * @return int


     */
    protected function peek($regex, &$out, $from = null)
    {
        if (! isset($from)) {
            $from = $this->count;
        }

        $r = '/' . $regex . '/' . $this->patternModifiers;

<         $result = preg_match($r, $this->buffer, $out, null, $from);



>         $result = preg_match($r, $this->buffer, $out, 0, $from);



        return $result;
    }

    /**
     * Seek to position in input stream (or return current position in input stream)
     *

<      * @param integer $where



>      * @param int $where


     */
    protected function seek($where)
    {
        $this->count = $where;
    }

    /**

>      * Assert a parsed part is plain CSS Valid
     * Match string looking for either ending delim, escape, or string interpolation
>      *
     *
>      * @param array|false $parsed
     * {@internal This is a workaround for preg_match's 250K string match limit. }}
>      * @param int         $startPos
     *
>      *
     * @param array  $m     Matches (passed by reference)
>      * @throws ParserException
     * @param string $delim Delimeter
>      */
     *
>     protected function assertPlainCssValid($parsed, $startPos = null)
     * @return boolean True if match; false otherwise
>     {
     */
>         $type = '';
    protected function matchString(&$m, $delim)
>         if ($parsed) {
    {
>             $type = $parsed[0];
        $token = null;
>             $parsed = $this->isPlainCssValidElement($parsed);

>         }
        $end = strlen($this->buffer);
>         if (! $parsed) {

>             if (! \is_null($startPos)) {
        // look for either ending delim, escape, or string interpolation
>                 $plain = rtrim(substr($this->buffer, $startPos, $this->count - $startPos));
        foreach (['#{', '\\', $delim] as $lookahead) {
>                 $message = "Error : `{$plain}` isn't allowed in plain CSS";
            $pos = strpos($this->buffer, $lookahead, $this->count);
>             } else {

>                 $message = 'Error: SCSS syntax not allowed in CSS file';
            if ($pos !== false && $pos < $end) {
>             }
                $end = $pos;
>             if ($type) {
                $token = $lookahead;
>                 $message .= " ($type)";
            }
>             }
        }
>             throw $this->parseError($message);

>         }
        if (! isset($token)) {
> 
            return false;
>         return $parsed;
        }
>     }

> 
        $match = substr($this->buffer, $this->count, $end - $this->count);
>     /**
        $m = [
>      * Check a parsed element is plain CSS Valid
            $match . $token,
>      *
            $match,
>      * @param array $parsed
            $token
>      * @param bool  $allowExpression
        ];
>      *
        $this->count = $end + strlen($token);
>      * @return bool|array

>      */
        return true;
>     protected function isPlainCssValidElement($parsed, $allowExpression = false)
    }
>     {

>         // keep string as is
    /**
>         if (is_string($parsed)) {
     * Try to match something on head of buffer
>             return $parsed;
     *
>         }
     * @param string  $regex
> 
     * @param array   $out
>         if (
     * @param boolean $eatWhitespace
>             \in_array($parsed[0], [Type::T_FUNCTION, Type::T_FUNCTION_CALL]) &&
     *
>             !\in_array($parsed[1], [
     * @return boolean
>                 'alpha',
     */
>                 'attr',
    protected function match($regex, &$out, $eatWhitespace = null)
>                 'calc',
    {
>                 'cubic-bezier',
        $r = '/' . $regex . '/' . $this->patternModifiers;
>                 'env',

>                 'grayscale',
        if (! preg_match($r, $this->buffer, $out, null, $this->count)) {
>                 'hsl',
            return false;
>                 'hsla',
        }
>                 'hwb',

>                 'invert',
        $this->count += strlen($out[0]);
>                 'linear-gradient',

>                 'min',
        if (! isset($eatWhitespace)) {
>                 'max',
            $eatWhitespace = $this->eatWhiteDefault;
>                 'radial-gradient',
        }
>                 'repeating-linear-gradient',

>                 'repeating-radial-gradient',
        if ($eatWhitespace) {
>                 'rgb',
            $this->whitespace();
>                 'rgba',
        }
>                 'rotate',

>                 'saturate',
        return true;
>                 'var',
    }
>             ]) &&

>             Compiler::isNativeFunction($parsed[1])
    /**
>         ) {
     * Match a single string
>             return false;
     *
>         }
     * @param string  $char
> 
     * @param boolean $eatWhitespace
>         switch ($parsed[0]) {
     *
>             case Type::T_BLOCK:
     * @return boolean
>             case Type::T_KEYWORD:
     */
>             case Type::T_NULL:
    protected function matchChar($char, $eatWhitespace = null)
>             case Type::T_NUMBER:
    {
>             case Type::T_MEDIA:
        if (! isset($this->buffer[$this->count]) || $this->buffer[$this->count] !== $char) {
>                 return $parsed;
            return false;
> 
        }
>             case Type::T_COMMENT:

>                 if (isset($parsed[2])) {
        $this->count++;
>                     return false;

>                 }
        if (! isset($eatWhitespace)) {
>                 return $parsed;
            $eatWhitespace = $this->eatWhiteDefault;
> 
        }
>             case Type::T_DIRECTIVE:

>                 if (\is_array($parsed[1])) {
        if ($eatWhitespace) {
>                     $parsed[1][1] = $this->isPlainCssValidElement($parsed[1][1]);
            $this->whitespace();
>                     if (! $parsed[1][1]) {
        }
>                         return false;

>                     }
        return true;
>                 }
    }
> 

>                 return $parsed;
    /**
> 
     * Match literal string
>             case Type::T_IMPORT:
     *
>                 if ($parsed[1][0] === Type::T_LIST) {
     * @param string  $what
>                     return false;
     * @param integer $len
>                 }
     * @param boolean $eatWhitespace
>                 $parsed[1] = $this->isPlainCssValidElement($parsed[1]);
     *
>                 if ($parsed[1] === false) {
     * @return boolean
>                     return false;
     */
>                 }
    protected function literal($what, $len, $eatWhitespace = null)
>                 return $parsed;
    {
> 
        if (strcasecmp(substr($this->buffer, $this->count, $len), $what) !== 0) {
>             case Type::T_STRING:
            return false;
>                 foreach ($parsed[2] as $k => $substr) {
        }
>                     if (\is_array($substr)) {

>                         $parsed[2][$k] = $this->isPlainCssValidElement($substr);
        $this->count += $len;
>                         if (! $parsed[2][$k]) {

>                             return false;
        if (! isset($eatWhitespace)) {
>                         }
            $eatWhitespace = $this->eatWhiteDefault;
>                     }
        }
>                 }

>                 return $parsed;
        if ($eatWhitespace) {
> 
            $this->whitespace();
>             case Type::T_LIST:
        }
>                 if (!empty($parsed['enclosing'])) {

>                     return false;
        return true;
>                 }
    }
>                 foreach ($parsed[2] as $k => $listElement) {

>                     $parsed[2][$k] = $this->isPlainCssValidElement($listElement);
    /**
>                     if (! $parsed[2][$k]) {
     * Match some whitespace
>                         return false;
     *
>                     }
     * @return boolean
>                 }
     */
>                 return $parsed;
    protected function whitespace()
> 
    {
>             case Type::T_ASSIGN:
        $gotWhite = false;
>                 foreach ([1, 2, 3] as $k) {

>                     if (! empty($parsed[$k])) {
        while (preg_match(static::$whitePattern, $this->buffer, $m, null, $this->count)) {
>                         $parsed[$k] = $this->isPlainCssValidElement($parsed[$k]);
            if (isset($m[1]) && empty($this->commentsSeen[$this->count])) {
>                         if (! $parsed[$k]) {
                // comment that are kept in the output CSS
>                             return false;
                $comment = [];
>                         }
                $startCommentCount = $this->count;
>                     }
                $endCommentCount = $this->count + strlen($m[1]);
>                 }

>                 return $parsed;
                // find interpolations in comment
> 
                $p = strpos($this->buffer, '#{', $this->count);
>             case Type::T_EXPRESSION:

>                 list( ,$op, $lhs, $rhs, $inParens, $whiteBefore, $whiteAfter) = $parsed;
                while ($p !== false && $p < $endCommentCount) {
>                 if (! $allowExpression &&  ! \in_array($op, ['and', 'or', '/'])) {
                    $c           = substr($this->buffer, $this->count, $p - $this->count);
>                     return false;
                    $comment[]   = $c;
>                 }
                    $this->count = $p;
>                 $lhs = $this->isPlainCssValidElement($lhs, true);
                    $out         = null;
>                 if (! $lhs) {

>                     return false;
                    if ($this->interpolation($out)) {
>                 }
                        // keep right spaces in the following string part
>                 $rhs = $this->isPlainCssValidElement($rhs, true);
                        if ($out[3]) {
>                 if (! $rhs) {
                            while ($this->buffer[$this->count-1] !== '}') {
>                     return false;
                                $this->count--;
>                 }
                            }
> 

>                 return [
                            $out[3] = '';
>                     Type::T_STRING,
                        }
>                     '', [

>                         $this->inParens ? '(' : '',
                        $comment[] = [Type::T_COMMENT, substr($this->buffer, $p, $this->count - $p), $out];
>                         $lhs,
                    } else {
>                         ($whiteBefore ? ' ' : '') . $op . ($whiteAfter ? ' ' : ''),
                        $comment[] = substr($this->buffer, $this->count, 2);
>                         $rhs,

>                         $this->inParens ? ')' : ''
                        $this->count += 2;
>                     ]
                    }
>                 ];

> 
                    $p = strpos($this->buffer, '#{', $this->count);
>             case Type::T_CUSTOM_PROPERTY:
                }
>             case Type::T_UNARY:

>                 $parsed[2] = $this->isPlainCssValidElement($parsed[2]);
                // remaining part
>                 if (! $parsed[2]) {
                $c = substr($this->buffer, $this->count, $endCommentCount - $this->count);
>                     return false;

>                 }
                if (! $comment) {
>                 return $parsed;
                    // single part static comment
> 
                    $this->appendComment([Type::T_COMMENT, $c]);
>             case Type::T_FUNCTION:
                } else {
>                 $argsList = $parsed[2];
                    $comment[] = $c;
>                 foreach ($argsList[2] as $argElement) {
                    $staticComment = substr($this->buffer, $startCommentCount, $endCommentCount - $startCommentCount);
>                     if (! $this->isPlainCssValidElement($argElement)) {
                    $this->appendComment([Type::T_COMMENT, $staticComment, [Type::T_STRING, '', $comment]]);
>                         return false;
                }
>                     }

>                 }
                $this->commentsSeen[$startCommentCount] = true;
>                 return $parsed;
                $this->count = $endCommentCount;
> 
            } else {
>             case Type::T_FUNCTION_CALL:
                // comment that are ignored and not kept in the output css
>                 $parsed[0] = Type::T_FUNCTION;
                $this->count += strlen($m[0]);
>                 $argsList = [Type::T_LIST, ',', []];
            }
>                 foreach ($parsed[2] as $arg) {

>                     if ($arg[0] || ! empty($arg[2])) {
            $gotWhite = true;
>                         // no named arguments possible in a css function call
        }
>                         // nor ... argument

>                         return false;
        return $gotWhite;
>                     }
    }
>                     $arg = $this->isPlainCssValidElement($arg[1], $parsed[1] === 'calc');

>                     if (! $arg) {
    /**
>                         return false;
     * Append comment to current block
>                     }
     *
>                     $argsList[2][] = $arg;
     * @param array $comment
>                 }
     */
>                 $parsed[2] = $argsList;
    protected function appendComment($comment)
>                 return $parsed;
    {
>         }
        if (! $this->discardComments) {
> 
            if ($comment[0] === Type::T_COMMENT) {
>         return false;
                if (is_string($comment[1])) {
>     }
                    $comment[1] = substr(preg_replace(['/^\s+/m', '/^(.)/m'], ['', ' \1'], $comment[1]), 1);
> 
                }
>     /**



<      * @param string $delim Delimeter



>      * @param string $delim Delimiter



<      * @return boolean True if match; false otherwise



>      * @return bool True if match; false otherwise



<         $end = strlen($this->buffer);



>         $end = \strlen($this->buffer);



<         foreach (['#{', '\\', $delim] as $lookahead) {



>         foreach (['#{', '\\', "\r", $delim] as $lookahead) {



<         $this->count = $end + strlen($token);



>         $this->count = $end + \strlen($token);



<      * @param boolean $eatWhitespace



>      * @param bool   $eatWhitespace



<      * @return boolean



>      * @return bool



<         if (! preg_match($r, $this->buffer, $out, null, $this->count)) {



>         if (! preg_match($r, $this->buffer, $out, 0, $this->count)) {



<         $this->count += strlen($out[0]);



>         $this->count += \strlen($out[0]);



<      * @param boolean $eatWhitespace



>      * @param bool   $eatWhitespace



<      * @return boolean



>      * @return bool



<      * @param integer $len
<      * @param boolean $eatWhitespace



>      * @param int    $len
>      * @param bool   $eatWhitespace



<      * @return boolean



>      * @return bool



<      * @return boolean



>      * @return bool



<         while (preg_match(static::$whitePattern, $this->buffer, $m, null, $this->count)) {



>         while (preg_match(static::$whitePattern, $this->buffer, $m, 0, $this->count)) {



<                 $endCommentCount = $this->count + strlen($m[1]);



>                 $endCommentCount = $this->count + \strlen($m[1]);


    /**

>                         list($line, $column) = $this->getSourcePosition($this->count);
     * Append statement to current block
>                         $file = $this->sourceName;
     *
>                         if (!$this->discardComments) {
     * @param array   $statement
>                             $this->logger->warn("Unterminated interpolations in multiline comments are deprecated and will be removed in ScssPhp 2.0, in \"$file\", line $line, column $column.", true);
     * @param integer $pos
>                         }



<                     $this->appendComment([Type::T_COMMENT, $staticComment, [Type::T_STRING, '', $comment]]);



>                     $commentStatement = [Type::T_COMMENT, $staticComment, [Type::T_STRING, '', $comment]];
> 
>                     list($line, $column) = $this->getSourcePosition($startCommentCount);
>                     $commentStatement[self::SOURCE_LINE] = $line;
>                     $commentStatement[self::SOURCE_COLUMN] = $column;
>                     $commentStatement[self::SOURCE_INDEX] = $this->sourceIndex;
> 
>                     $this->appendComment($commentStatement);



<                 $this->count += strlen($m[0]);



>                 $this->count += \strlen($m[0]);
>                 // silent comments are not allowed in plain CSS files
>                 ! $this->cssOnly
>                   || ! \strlen(trim($m[0]))
>                   || $this->assertPlainCssValid(false, $this->count - \strlen($m[0]));



<             if ($comment[0] === Type::T_COMMENT) {
<                 if (is_string($comment[1])) {
<                     $comment[1] = substr(preg_replace(['/^\s+/m', '/^(.)/m'], ['', ' \1'], $comment[1]), 1);
<                 }
<                 if (isset($comment[2]) and is_array($comment[2]) and $comment[2][0] === Type::T_STRING) {
<                     foreach ($comment[2][2] as $k => $v) {
<                         if (is_string($v)) {
<                             $p = strpos($v, "\n");
<                             if ($p !== false) {
<                                 $comment[2][2][$k] = substr($v, 0, $p + 1)
<                                     . preg_replace(['/^\s+/m', '/^(.)/m'], ['', ' \1'], substr($v, $p+1));
<                             }
<                         }
<                     }
<                 }
<             }
< 



<      * @param array   $statement
<      * @param integer $pos



>      * @param array|null $statement
>      * @param int        $pos



<         if (! is_null($statement)) {
<             if (! is_null($pos)) {



>         if (! \is_null($statement)) {
>             ! $this->cssOnly || ($statement = $this->assertPlainCssValid($statement, $pos));
> 
>             if (! \is_null($pos)) {


    /**
     * Returns last child was appended
     *
     * @return array|null
     */
    protected function last()
    {

<         $i = count($this->env->children) - 1;



>         $i = \count($this->env->children) - 1;



        if (isset($this->env->children[$i])) {
            return $this->env->children[$i];
        }
    }

    /**
     * Parse media query list
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function mediaQueryList(&$out)
    {
        return $this->genericList($out, 'mediaQuery', ',', false);
    }

    /**
     * Parse media query
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function mediaQuery(&$out)
    {
        $expressions = null;
        $parts = [];


<         if (($this->literal('only', 4) && ($only = true) || $this->literal('not', 3) && ($not = true) || true) &&



>         if (
>             ($this->literal('only', 4) && ($only = true) ||
>             $this->literal('not', 3) && ($not = true) || true) &&


            $this->mixedKeyword($mediaType)
        ) {
            $prop = [Type::T_MEDIA_TYPE];

            if (isset($only)) {
                $prop[] = [Type::T_KEYWORD, 'only'];
            }

            if (isset($not)) {
                $prop[] = [Type::T_KEYWORD, 'not'];
            }

            $media = [Type::T_LIST, '', []];

            foreach ((array) $mediaType as $type) {

<                 if (is_array($type)) {



>                 if (\is_array($type)) {


                    $media[2][] = $type;
                } else {
                    $media[2][] = [Type::T_KEYWORD, $type];
                }
            }

            $prop[]  = $media;
            $parts[] = $prop;
        }

        if (empty($parts) || $this->literal('and', 3)) {
            $this->genericList($expressions, 'mediaExpression', 'and', false);


<             if (is_array($expressions)) {



>             if (\is_array($expressions)) {


                $parts = array_merge($parts, $expressions[2]);
            }
        }

        $out = $parts;

        return true;
    }

    /**
     * Parse supports query
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function supportsQuery(&$out)
    {
        $expressions = null;
        $parts = [];

        $s = $this->count;

        $not = false;


<         if (($this->literal('not', 3) && ($not = true) || true) &&



>         if (
>             ($this->literal('not', 3) && ($not = true) || true) &&


            $this->matchChar('(') &&
            ($this->expression($property)) &&
            $this->literal(': ', 2) &&
            $this->valueList($value) &&
            $this->matchChar(')')
         ) {
            $support = [Type::T_STRING, '', [[Type::T_KEYWORD, ($not ? 'not ' : '') . '(']]];
            $support[2][] = $property;
            $support[2][] = [Type::T_KEYWORD, ': '];
            $support[2][] = $value;
            $support[2][] = [Type::T_KEYWORD, ')'];

            $parts[] = $support;
            $s = $this->count;
        } else {
            $this->seek($s);
        }


<         if ($this->matchChar('(') &&



>         if (
>             $this->matchChar('(') &&


            $this->supportsQuery($subQuery) &&
            $this->matchChar(')')
        ) {
            $parts[] = [Type::T_STRING, '', [[Type::T_KEYWORD, '('], $subQuery, [Type::T_KEYWORD, ')']]];
            $s = $this->count;
        } else {
            $this->seek($s);
        }


<         if ($this->literal('not', 3) &&



>         if (
>             $this->literal('not', 3) &&


            $this->supportsQuery($subQuery)
        ) {
            $parts[] = [Type::T_STRING, '', [[Type::T_KEYWORD, 'not '], $subQuery]];
            $s = $this->count;
        } else {
            $this->seek($s);
        }


<         if ($this->literal('selector(', 9) &&



>         if (
>             $this->literal('selector(', 9) &&


            $this->selector($selector) &&
            $this->matchChar(')')
        ) {
            $support = [Type::T_STRING, '', [[Type::T_KEYWORD, 'selector(']]];

            $selectorList = [Type::T_LIST, '', []];

            foreach ($selector as $sc) {
                $compound = [Type::T_STRING, '', []];

                foreach ($sc as $scp) {

<                     if (is_array($scp)) {



>                     if (\is_array($scp)) {


                        $compound[2][] = $scp;
                    } else {
                        $compound[2][] = [Type::T_KEYWORD, $scp];
                    }
                }

                $selectorList[2][] = $compound;
            }

> 


            $support[2][] = $selectorList;
            $support[2][] = [Type::T_KEYWORD, ')'];
            $parts[] = $support;
            $s = $this->count;
        } else {
            $this->seek($s);
        }

        if ($this->variable($var) or $this->interpolation($var)) {
            $parts[] = $var;
            $s = $this->count;
        } else {
            $this->seek($s);
        }


<         if ($this->literal('and', 3) &&
<             $this->genericList($expressions, 'supportsQuery', ' and', false)) {



>         if (
>             $this->literal('and', 3) &&
>             $this->genericList($expressions, 'supportsQuery', ' and', false)
>         ) {


            array_unshift($expressions[2], [Type::T_STRING, '', $parts]);

            $parts = [$expressions];
            $s = $this->count;
        } else {
            $this->seek($s);
        }


<         if ($this->literal('or', 2) &&
<             $this->genericList($expressions, 'supportsQuery', ' or', false)) {



>         if (
>             $this->literal('or', 2) &&
>             $this->genericList($expressions, 'supportsQuery', ' or', false)
>         ) {


            array_unshift($expressions[2], [Type::T_STRING, '', $parts]);

            $parts = [$expressions];
            $s = $this->count;
        } else {
            $this->seek($s);
        }


<         if (count($parts)) {



>         if (\count($parts)) {


            if ($this->eatWhiteDefault) {
                $this->whitespace();
            }

            $out = [Type::T_STRING, '', $parts];

            return true;
        }

        return false;
    }


    /**
     * Parse media expression
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function mediaExpression(&$out)
    {
        $s = $this->count;
        $value = null;


<         if ($this->matchChar('(') &&



>         if (
>             $this->matchChar('(') &&


            $this->expression($feature) &&

<             ($this->matchChar(':') && $this->expression($value) || true) &&



>             ($this->matchChar(':') &&
>                 $this->expression($value) || true) &&


            $this->matchChar(')')
        ) {
            $out = [Type::T_MEDIA_EXPRESSION, $feature];

            if ($value) {
                $out[] = $value;
            }

            return true;
        }

        $this->seek($s);

        return false;
    }

    /**
     * Parse argument values
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function argValues(&$out)
    {

>         $discardComments = $this->discardComments;
        if ($this->genericList($list, 'argValue', ',', false)) {
>         $this->discardComments = true;
            $out = $list[2];
> 




>             $this->discardComments = $discardComments;
            return true;
> 


        }


>         $this->discardComments = $discardComments;
        return false;
> 


    }

    /**
     * Parse argument value
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function argValue(&$out)
    {
        $s = $this->count;

        $keyword = null;

        if (! $this->variable($keyword) || ! $this->matchChar(':')) {
            $this->seek($s);

            $keyword = null;
        }


<         if ($this->genericList($value, 'expression')) {



>         if ($this->genericList($value, 'expression', '', true)) {


            $out = [$keyword, $value, false];
            $s = $this->count;

            if ($this->literal('...', 3)) {
                $out[2] = true;
            } else {
                $this->seek($s);
            }

            return true;
        }

        return false;
    }

    /**

>      * Check if a generic directive is known to be able to allow almost any syntax or not
     * Parse comma separated value list
>      * @param mixed $directiveName
     *
>      * @return bool
     * @param array $out
>      */
     *
>     protected function isKnownGenericDirective($directiveName)
     * @return boolean
>     {
     */
>         if (\is_array($directiveName) && \is_string(reset($directiveName))) {
    protected function valueList(&$out)
>             $directiveName = reset($directiveName);
    {
>         }
        $discardComments = $this->discardComments;
>         if (! \is_string($directiveName)) {
        $this->discardComments = true;
>             return false;
        $res = $this->genericList($out, 'spaceList', ',');
>         }
        $this->discardComments = $discardComments;
>         if (

>             \in_array($directiveName, [
        return $res;
>             'at-root',
    }
>             'media',

>             'mixin',
    /**
>             'include',
     * Parse space separated value list
>             'scssphp-import-once',
     *
>             'import',
     * @param array $out
>             'extend',
     *
>             'function',
     * @return boolean
>             'break',
     */
>             'continue',
    protected function spaceList(&$out)
>             'return',
    {
>             'each',
        return $this->genericList($out, 'expression');
>             'while',
    }
>             'for',

>             'if',
    /**
>             'debug',
     * Parse generic list
>             'warn',
     *
>             'error',
     * @param array    $out
>             'content',
     * @param callable $parseItem
>             'else',
     * @param string   $delim
>             'charset',
     * @param boolean  $flatten
>             'supports',
     *
>             // Todo
     * @return boolean
>             'use',
     */
>             'forward',
    protected function genericList(&$out, $parseItem, $delim = '', $flatten = true)
>             ])
    {
>         ) {
        $s     = $this->count;
>             return true;
        $items = [];
>         }
        $value = null;
>         return false;

>     }
        while ($this->$parseItem($value)) {
> 
            $trailing_delim = false;
>     /**
            $items[] = $value;
>      * Parse directive value list that considers $vars as keyword

>      *
            if ($delim) {
>      * @param array       $out
                if (! $this->literal($delim, strlen($delim))) {
>      * @param bool|string $endChar
                    break;
>      *
                }
>      * @return bool
                $trailing_delim = true;
>      */
            }
>     protected function directiveValue(&$out, $endChar = false)
        }
>     {

>         $s = $this->count;
        if (! $items) {
> 
            $this->seek($s);
>         if ($this->variable($out)) {

>             if ($endChar && $this->matchChar($endChar, false)) {
            return false;
>                 return true;
        }
>             }

> 
        if ($trailing_delim) {
>             if (! $endChar && $this->end()) {
            $items[] = [Type::T_NULL];
>                 return true;
        }
>             }
        if ($flatten && count($items) === 1) {
>         }
            $out = $items[0];
> 
        } else {
>         $this->seek($s);
            $out = [Type::T_LIST, $delim, $items];
> 
        }
>         if (\is_string($endChar) && $this->openString($endChar ? $endChar : ';', $out, null, null, true, ";}{")) {

>             if ($endChar && $this->matchChar($endChar, false)) {
        return true;
>                 return true;
    }
>             }

>             $ss = $this->count;
    /**
>             if (!$endChar && $this->end()) {
     * Parse expression
>                 $this->seek($ss);
     *
>                 return true;
     * @param array $out
>             }
     * @param bool $listOnly
>         }
     * @param bool $lookForExp
> 
     *
>         $this->seek($s);
     * @return boolean
> 
     */
>         $allowVars = $this->allowVars;
    protected function expression(&$out, $listOnly = false, $lookForExp = true)
>         $this->allowVars = false;
    {
> 
        $s = $this->count;
>         $res = $this->genericList($out, 'spaceList', ',');
        $discard = $this->discardComments;
>         $this->allowVars = $allowVars;
        $this->discardComments = true;
> 
        $allowedTypes = ($listOnly ? [Type::T_LIST] : [Type::T_LIST, Type::T_MAP]);
>         if ($res) {

>             if ($endChar && $this->matchChar($endChar, false)) {
        if ($this->matchChar('(')) {
>                 return true;
            if ($this->enclosedExpression($lhs, $s, ")", $allowedTypes)) {
>             }
                if ($lookForExp) {
> 
                    $out = $this->expHelper($lhs, 0);
>             if (! $endChar && $this->end()) {
                } else {
>                 return true;
                    $out = $lhs;
>             }
                }
>         }

> 
                $this->discardComments = $discard;
>         $this->seek($s);

> 
                return true;
>         if ($endChar && $this->matchChar($endChar, false)) {
            }
>             return true;

>         }
            $this->seek($s);
> 
        }
>         return false;

>     }
        if (in_array(Type::T_LIST, $allowedTypes) && $this->matchChar('[')) {
> 
            if ($this->enclosedExpression($lhs, $s, "]", [Type::T_LIST])) {
>     /**



<      * @return boolean



>      * @return bool


                    $out = $this->expHelper($lhs, 0);

>      * Parse a function call, where externals () are part of the call
                } else {
>      * and not of the value list
                    $out = $lhs;
>      *
                }
>      * @param array       $out
                $this->discardComments = $discard;
>      * @param bool        $mandatoryEnclos

>      * @param null|string $charAfter
                return true;
>      * @param null|bool   $eatWhiteSp
            }
>      *

>      * @return bool
            $this->seek($s);
>      */
        }
>     protected function functionCallArgumentsList(&$out, $mandatoryEnclos = true, $charAfter = null, $eatWhiteSp = null)

>     {
        if (!$listOnly && $this->value($lhs)) {
>         $s = $this->count;
            if ($lookForExp) {
> 
                $out = $this->expHelper($lhs, 0);
>         if (
            } else {
>             $this->matchChar('(') &&
                $out = $lhs;
>             $this->valueList($out) &&
            }
>             $this->matchChar(')') &&

>             ($charAfter ? $this->matchChar($charAfter, $eatWhiteSp) : $this->end())
            $this->discardComments = $discard;
>         ) {

>             return true;
            return true;
>         }
        }
> 

>         if (! $mandatoryEnclos) {
        $this->discardComments = $discard;
>             $this->seek($s);
        return false;
> 
    }
>             if (

>                 $this->valueList($out) &&
    /**
>                 ($charAfter ? $this->matchChar($charAfter, $eatWhiteSp) : $this->end())
     * Parse expression specifically checking for lists in parenthesis or brackets
>             ) {
     *
>                 return true;
     * @param array   $out
>             }
     * @param integer $s
>         }
     * @param string  $closingParen
> 
     * @param array   $allowedTypes
>         $this->seek($s);
     *
> 
     * @return boolean
>         return false;
     */
>     }
    protected function enclosedExpression(&$out, $s, $closingParen = ")", $allowedTypes = [Type::T_LIST, Type::T_MAP])
> 
    {
>     /**



<      * @return boolean



>      * @return bool



<      * @param callable $parseItem



>      * @param string $parseItem The name of the method used to parse items



<      * @param boolean  $flatten



>      * @param bool   $flatten



<      * @return boolean



>      * @return bool



<                 if (! $this->literal($delim, strlen($delim))) {



>                 if (! $this->literal($delim, \strlen($delim))) {


                    break;

> 


                case "]":

>             } else {
                    $out['enclosing'] = 'bracket'; // bracketed list
>                 // if no delim watch that a keyword didn't eat the single/double quote
                    break;
>                 // from the following starting string
            }
>                 if ($value[0] === Type::T_KEYWORD) {
            return true;
>                     $word = $value[1];
        }
> 

>                     $last_char = substr($word, -1);
        if ($this->valueList($out) && $this->matchChar($closingParen)
> 
            && in_array($out[0], [Type::T_LIST, Type::T_KEYWORD])
>                     if (
            && in_array(Type::T_LIST, $allowedTypes)) {
>                         strlen($word) > 1 &&
            if ($out[0] !== Type::T_LIST || ! empty($out['enclosing'])) {
>                         in_array($last_char, [ "'", '"']) &&
                $out = [Type::T_LIST, '', [$out]];
>                         substr($word, -2, 1) !== '\\'
            }
>                     ) {
            switch ($closingParen) {
>                         // if there is a non escaped opening quote in the keyword, this seems unlikely a mistake
                case ")":
>                         $word = str_replace('\\' . $last_char, '\\\\', $word);
                    $out['enclosing'] = 'parent'; // parenthesis list
>                         if (strpos($word, $last_char) < strlen($word) - 1) {
                    break;
>                             continue;
                case "]":
>                         }
                    $out['enclosing'] = 'bracket'; // bracketed list
> 
                    break;
>                         $currentCount = $this->count;
            }
> 
            return true;
>                         // let's try to rewind to previous char and try a parse
        }
>                         $this->count--;

>                         // in case the keyword also eat spaces
        $this->seek($s);
>                         while (substr($this->buffer, $this->count, 1) !== $last_char) {

>                             $this->count--;
        if (in_array(Type::T_MAP, $allowedTypes) && $this->map($out)) {
>                         }
            return true;
> 
        }
>                         $nextValue = null;

>                         if ($this->$parseItem($nextValue)) {
        return false;
>                             if ($nextValue[0] === Type::T_KEYWORD && $nextValue[1] === $last_char) {
    }
>                                 // bad try, forget it

>                                 $this->seek($currentCount);
    /**
>                                 continue;
     * Parse left-hand side of subexpression
>                             }
     *
>                             if ($nextValue[0] !== Type::T_STRING) {
     * @param array   $lhs
>                                 // bad try, forget it
     * @param integer $minP
>                                 $this->seek($currentCount);
     *
>                                 continue;
     * @return array
>                             }
     */
> 
    protected function expHelper($lhs, $minP)
>                             // OK it was a good idea
    {
>                             $value[1] = substr($value[1], 0, -1);
        $operators = static::$operatorPattern;
>                             array_pop($items);

>                             $items[] = $value;
        $ss = $this->count;
>                             $items[] = $nextValue;
        $whiteBefore = isset($this->buffer[$this->count - 1]) &&
>                         } else {
            ctype_space($this->buffer[$this->count - 1]);
>                             // bad try, forget it

>                             $this->seek($currentCount);
        while ($this->match($operators, $m, false) && static::$precedence[$m[1]] >= $minP) {
>                             continue;
            $whiteAfter = isset($this->buffer[$this->count]) &&
>                         }
                ctype_space($this->buffer[$this->count]);
>                     }
            $varAfter = isset($this->buffer[$this->count]) &&
>                 }



<         if ($flatten && count($items) === 1) {



> 
>         if ($flatten && \count($items) === 1) {



<      * @return boolean



>      * @return bool



<             if ($this->enclosedExpression($lhs, $s, ")", $allowedTypes)) {



>             if ($this->enclosedExpression($lhs, $s, ')', $allowedTypes)) {



<         if (in_array(Type::T_LIST, $allowedTypes) && $this->matchChar('[')) {
<             if ($this->enclosedExpression($lhs, $s, "]", [Type::T_LIST])) {



>         if (\in_array(Type::T_LIST, $allowedTypes) && $this->matchChar('[')) {
>             if ($this->enclosedExpression($lhs, $s, ']', [Type::T_LIST])) {




> 


            // don't turn negative numbers into expressions

> 



<      * @param integer $s



>      * @param int     $s



<      * @return boolean



>      * @return bool



<     protected function enclosedExpression(&$out, $s, $closingParen = ")", $allowedTypes = [Type::T_LIST, Type::T_MAP])



>     protected function enclosedExpression(&$out, $s, $closingParen = ')', $allowedTypes = [Type::T_LIST, Type::T_MAP])



<         if ($this->matchChar($closingParen) && in_array(Type::T_LIST, $allowedTypes)) {



>         if ($this->matchChar($closingParen) && \in_array(Type::T_LIST, $allowedTypes)) {


            if (! $this->value($rhs) && ! $this->expression($rhs, true, false)) {

> 



<                 case ")":



>                 case ')':



<                 case "]":



> 
>                 case ']':




> 



<         if ($this->valueList($out) && $this->matchChar($closingParen)
<             && in_array($out[0], [Type::T_LIST, Type::T_KEYWORD])
<             && in_array(Type::T_LIST, $allowedTypes)) {



>         if (
>             $this->valueList($out) &&
>             $this->matchChar($closingParen) && ! ($closingParen === ')' &&
>             \in_array($out[0], [Type::T_EXPRESSION, Type::T_UNARY])) &&
>             \in_array(Type::T_LIST, $allowedTypes)
>         ) {


            }

> 



<                 case ")":



>                 case ')':



<                 case "]":



> 
>                 case ']':


            $ss = $this->count;

> 



<         if (in_array(Type::T_MAP, $allowedTypes) && $this->map($out)) {



>         if (\in_array(Type::T_MAP, $allowedTypes) && $this->map($out)) {



<      * @param integer $minP



>      * @param int   $minP



<             // peek and see if rhs belongs to next operator
<             if ($this->peek($operators, $next) && static::$precedence[$next[1]] > static::$precedence[$op]) {
<                 $rhs = $this->expHelper($rhs, static::$precedence[$next[1]]);



>             if ($op === '-' && ! $whiteAfter && $rhs[0] === Type::T_KEYWORD) {
>                 break;




>             // consume higher-precedence operators on the right-hand side
        return $lhs;
>             $rhs = $this->expHelper($rhs, static::$precedence[$op] + 1);
    }
> 




> 


    /**
     * Parse value
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function value(&$out)
    {
        if (! isset($this->buffer[$this->count])) {
            return false;
        }

        $s = $this->count;
        $char = $this->buffer[$this->count];


<         if ($this->literal('url(', 4) && $this->match('data:([a-z]+)\/([a-z0-9.+-]+);base64,', $m, false)) {



>         if (
>             $this->literal('url(', 4) &&
>             $this->match('data:([a-z]+)\/([a-z0-9.+-]+);base64,', $m, false)
>         ) {


            $len = strspn(
                $this->buffer,
                'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwyxz0123456789+/=',
                $this->count
            );

            $this->count += $len;

            if ($this->matchChar(')')) {
                $content = substr($this->buffer, $s, $this->count - $s);
                $out = [Type::T_KEYWORD, $content];

                return true;
            }
        }

        $this->seek($s);


<         if ($this->literal('url(', 4, false) && $this->match('\s*(\/\/[^\s\)]+)\s*', $m)) {



>         if (
>             $this->literal('url(', 4, false) &&
>             $this->match('\s*(\/\/[^\s\)]+)\s*', $m)
>         ) {


            $content = 'url(' . $m[1];

            if ($this->matchChar(')')) {
                $content .= ')';
                $out = [Type::T_KEYWORD, $content];

                return true;
            }
        }

        $this->seek($s);

        // not
        if ($char === 'n' && $this->literal('not', 3, false)) {

<             if ($this->whitespace() && $this->value($inner)) {



>             if (
>                 $this->whitespace() &&
>                 $this->value($inner)
>             ) {


                $out = [Type::T_UNARY, 'not', $inner, $this->inParens];

                return true;
            }

            $this->seek($s);

            if ($this->parenValue($inner)) {
                $out = [Type::T_UNARY, 'not', $inner, $this->inParens];

                return true;
            }

            $this->seek($s);
        }

        // addition
        if ($char === '+') {
            $this->count++;


>             $follow_white = $this->whitespace();
            if ($this->value($inner)) {
> 


                $out = [Type::T_UNARY, '+', $inner, $this->inParens];

                return true;
            }


<             $this->count--;



>             if ($follow_white) {
>                 $out = [Type::T_KEYWORD, $char];
>                 return  true;
>             }
> 
>             $this->seek($s);



            return false;
        }

        // negation
        if ($char === '-') {

>             if ($this->customProperty($out)) {
            $this->count++;
>                 return true;

>             }
            if ($this->variable($inner) || $this->unit($inner) || $this->parenValue($inner)) {
> 


                $out = [Type::T_UNARY, '-', $inner, $this->inParens];

>             $follow_white = $this->whitespace();

> 


                return true;
            }


<             $this->count--;



>             if (
>                 $this->keyword($inner) &&
>                 ! $this->func($inner, $out)
>             ) {
>                 $out = [Type::T_UNARY, '-', $inner, $this->inParens];
> 
>                 return true;
>             }
> 
>             if ($follow_white) {
>                 $out = [Type::T_KEYWORD, $char];
> 
>                 return  true;
>             }
> 
>             $this->seek($s);


        }

        // paren
        if ($char === '(' && $this->parenValue($out)) {
            return true;
        }

        if ($char === '#') {
            if ($this->interpolation($out) || $this->color($out)) {
                return true;
            }

> 
        }
>             $this->count++;

> 
        if ($this->matchChar('&', true)) {
>             if ($this->keyword($keyword)) {
            $out = [Type::T_SELF];
>                 $out = [Type::T_KEYWORD, '#' . $keyword];

> 
            return true;
>                 return true;
        }
>             }

> 
        if ($char === '$' && $this->variable($out)) {
>             $this->count--;


            return true;
        }

        if ($char === 'p' && $this->progid($out)) {
            return true;
        }

        if (($char === '"' || $char === "'") && $this->string($out)) {
            return true;
        }

        if ($this->unit($out)) {
            return true;
        }

        // unicode range with wildcards

<         if ($this->literal('U+', 2) && $this->match('([0-9A-F]+\?*)(-([0-9A-F]+))?', $m, false)) {



>         if (
>             $this->literal('U+', 2) &&
>             $this->match('\?+|([0-9A-F]+(\?+|(-[0-9A-F]+))?)', $m, false)
>         ) {
>             $unicode = explode('-', $m[0]);
>             if (strlen(reset($unicode)) <= 6 && strlen(end($unicode)) <= 6) {


            $out = [Type::T_KEYWORD, 'U+' . $m[0]];

            return true;
        }

>             $this->count -= strlen($m[0]) + 2;

>         }


        if ($this->keyword($keyword, false)) {
            if ($this->func($keyword, $out)) {
                return true;
            }

            $this->whitespace();

            if ($keyword === 'null') {
                $out = [Type::T_NULL];
            } else {
                $out = [Type::T_KEYWORD, $keyword];
            }

            return true;
        }

        return false;
    }

    /**
     * Parse parenthesized value
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function parenValue(&$out)
    {
        $s = $this->count;

        $inParens = $this->inParens;

        if ($this->matchChar('(')) {
            if ($this->matchChar(')')) {
                $out = [Type::T_LIST, '', []];

                return true;
            }

            $this->inParens = true;


<             if ($this->expression($exp) && $this->matchChar(')')) {



>             if (
>                 $this->expression($exp) &&
>                 $this->matchChar(')')
>             ) {


                $out = $exp;
                $this->inParens = $inParens;

                return true;
            }
        }

        $this->inParens = $inParens;
        $this->seek($s);

        return false;
    }

    /**
     * Parse "progid:"
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function progid(&$out)
    {
        $s = $this->count;


<         if ($this->literal('progid:', 7, false) &&



>         if (
>             $this->literal('progid:', 7, false) &&


            $this->openString('(', $fn) &&
            $this->matchChar('(')
        ) {
            $this->openString(')', $args, '(');

            if ($this->matchChar(')')) {
                $out = [Type::T_STRING, '', [
                    'progid:', $fn, '(', $args, ')'
                ]];

                return true;
            }
        }

        $this->seek($s);

        return false;
    }

    /**
     * Parse function call
     *
     * @param string $name
     * @param array  $func
     *

<      * @return boolean



>      * @return bool


     */
    protected function func($name, &$func)
    {
        $s = $this->count;

        if ($this->matchChar('(')) {
            if ($name === 'alpha' && $this->argumentList($args)) {
                $func = [Type::T_FUNCTION, $name, [Type::T_STRING, '', $args]];

                return true;
            }

            if ($name !== 'expression' && ! preg_match('/^(-[a-z]+-)?calc$/', $name)) {
                $ss = $this->count;


<                 if ($this->argValues($args) && $this->matchChar(')')) {



>                 if (
>                     $this->argValues($args) &&
>                     $this->matchChar(')')
>                 ) {


                    $func = [Type::T_FUNCTION_CALL, $name, $args];

                    return true;
                }

                $this->seek($ss);
            }


<             if (($this->openString(')', $str, '(') || true) &&



>             if (
>                 ($this->openString(')', $str, '(') || true) &&


                $this->matchChar(')')
            ) {
                $args = [];

                if (! empty($str)) {
                    $args[] = [null, [Type::T_STRING, '', [$str]]];
                }

                $func = [Type::T_FUNCTION_CALL, $name, $args];

                return true;
            }
        }

        $this->seek($s);

        return false;
    }

    /**
     * Parse function call argument list
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function argumentList(&$out)
    {
        $s = $this->count;
        $this->matchChar('(');

        $args = [];

        while ($this->keyword($var)) {

<             if ($this->matchChar('=') && $this->expression($exp)) {



>             if (
>                 $this->matchChar('=') &&
>                 $this->expression($exp)
>             ) {


                $args[] = [Type::T_STRING, '', [$var . '=']];
                $arg = $exp;
            } else {
                break;
            }

            $args[] = $arg;

            if (! $this->matchChar(',')) {
                break;
            }

            $args[] = [Type::T_STRING, '', [', ']];
        }

        if (! $this->matchChar(')') || ! $args) {
            $this->seek($s);

            return false;
        }

        $out = $args;

        return true;
    }

    /**
     * Parse mixin/function definition  argument list
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function argumentDef(&$out)
    {
        $s = $this->count;
        $this->matchChar('(');

        $args = [];

        while ($this->variable($var)) {
            $arg = [$var[1], null, false];

            $ss = $this->count;


<             if ($this->matchChar(':') && $this->genericList($defaultVal, 'expression')) {



>             if (
>                 $this->matchChar(':') &&
>                 $this->genericList($defaultVal, 'expression', '', true)
>             ) {


                $arg[1] = $defaultVal;
            } else {
                $this->seek($ss);
            }

            $ss = $this->count;

            if ($this->literal('...', 3)) {
                $sss = $this->count;

                if (! $this->matchChar(')')) {

<                     $this->throwParseError('... has to be after the final argument');



>                     throw $this->parseError('... has to be after the final argument');


                }

                $arg[2] = true;

> 


                $this->seek($sss);
            } else {
                $this->seek($ss);
            }

            $args[] = $arg;

            if (! $this->matchChar(',')) {
                break;
            }
        }

        if (! $this->matchChar(')')) {
            $this->seek($s);

            return false;
        }

        $out = $args;

        return true;
    }

    /**
     * Parse map
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function map(&$out)
    {
        $s = $this->count;

        if (! $this->matchChar('(')) {
            return false;
        }

        $keys = [];
        $values = [];


<         while ($this->genericList($key, 'expression') && $this->matchChar(':') &&
<             $this->genericList($value, 'expression')



>         while (
>             $this->genericList($key, 'expression', '', true) &&
>             $this->matchChar(':') &&
>             $this->genericList($value, 'expression', '', true)


        ) {
            $keys[] = $key;
            $values[] = $value;

            if (! $this->matchChar(',')) {
                break;
            }
        }

        if (! $keys || ! $this->matchChar(')')) {
            $this->seek($s);

            return false;
        }

        $out = [Type::T_MAP, $keys, $values];

        return true;
    }

    /**
     * Parse color
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function color(&$out)
    {
        $s = $this->count;


<         if ($this->match('(#([0-9a-f]+))', $m)) {
<             if (in_array(strlen($m[2]), [3,4,6,8])) {



>         if ($this->match('(#([0-9a-f]+)\b)', $m)) {
>             if (\in_array(\strlen($m[2]), [3,4,6,8])) {


                $out = [Type::T_KEYWORD, $m[0]];

> 


                return true;
            }

            $this->seek($s);

> 


            return false;
        }

        return false;
    }

    /**
     * Parse number with unit
     *
     * @param array $unit
     *

<      * @return boolean



>      * @return bool


     */
    protected function unit(&$unit)
    {
        $s = $this->count;

        if ($this->match('([0-9]*(\.)?[0-9]+)([%a-zA-Z]+)?', $m, false)) {

<             if (strlen($this->buffer) === $this->count || ! ctype_digit($this->buffer[$this->count])) {



>             if (\strlen($this->buffer) === $this->count || ! ctype_digit($this->buffer[$this->count])) {


                $this->whitespace();

                $unit = new Node\Number($m[1], empty($m[3]) ? '' : $m[3]);

                return true;
            }

            $this->seek($s);
        }

        return false;
    }

    /**
     * Parse string
     *
     * @param array $out

>      * @param bool  $keepDelimWithInterpolation


     *

<      * @return boolean



>      * @return bool


     */

<     protected function string(&$out)



>     protected function string(&$out, $keepDelimWithInterpolation = false)


    {
        $s = $this->count;

        if ($this->matchChar('"', false)) {
            $delim = '"';
        } elseif ($this->matchChar("'", false)) {
            $delim = "'";
        } else {
            return false;
        }

        $content = [];
        $oldWhite = $this->eatWhiteDefault;
        $this->eatWhiteDefault = false;
        $hasInterpolation = false;

        while ($this->matchString($m, $delim)) {
            if ($m[1] !== '') {
                $content[] = $m[1];
            }

            if ($m[2] === '#{') {

<                 $this->count -= strlen($m[2]);



>                 $this->count -= \strlen($m[2]);



                if ($this->interpolation($inter, false)) {
                    $content[] = $inter;
                    $hasInterpolation = true;
                } else {

<                     $this->count += strlen($m[2]);



>                     $this->count += \strlen($m[2]);


                    $content[] = '#{'; // ignore it
                }

>             } elseif ($m[2] === "\r") {
            } elseif ($m[2] === '\\') {
>                 $content[] = chr(10);
                if ($this->matchChar('"', false)) {
>                 // TODO : warning
                    $content[] = $m[2] . '"';
>                 # DEPRECATION WARNING on line x, column y of zzz:
                } elseif ($this->matchChar("'", false)) {
>                 # Unescaped multiline strings are deprecated and will be removed in a future version of Sass.
                    $content[] = $m[2] . "'";
>                 # To include a newline in a string, use "\a" or "\a " as in CSS.
                } elseif ($this->literal("\\", 1, false)) {
>                 if ($this->matchChar("\n", false)) {
                    $content[] = $m[2] . "\\";
>                     $content[] = ' ';
                } elseif ($this->literal("\r\n", 2, false) ||
>                 }



<                 if ($this->matchChar('"', false)) {
<                     $content[] = $m[2] . '"';
<                 } elseif ($this->matchChar("'", false)) {
<                     $content[] = $m[2] . "'";
<                 } elseif ($this->literal("\\", 1, false)) {
<                     $content[] = $m[2] . "\\";
<                 } elseif ($this->literal("\r\n", 2, false) ||



>                 if (
>                     $this->literal("\r\n", 2, false) ||


                }

>                 } elseif ($this->matchEscapeCharacter($c)) {
            } else {
>                     $content[] = $c;



<                     $content[] = $m[2];



>                     throw $this->parseError('Unterminated escape sequence');



<                 $this->count -= strlen($delim);



>                 $this->count -= \strlen($delim);


            }
        }

        $this->eatWhiteDefault = $oldWhite;


<         if ($this->literal($delim, strlen($delim))) {
<             if ($hasInterpolation) {



>         if ($this->literal($delim, \strlen($delim))) {
>             if ($hasInterpolation && ! $keepDelimWithInterpolation) {


                $delim = '"';

>             }

> 
                foreach ($content as &$string) {
>             $out = [Type::T_STRING, $delim, $content];
                    if ($string === "\\\\") {
> 
                        $string = "\\";
>             return true;
                    } elseif ($string === "\\'") {
>         }



<                 foreach ($content as &$string) {
<                     if ($string === "\\\\") {
<                         $string = "\\";
<                     } elseif ($string === "\\'") {
<                         $string = "'";
<                     } elseif ($string === '\\"') {
<                         $string = '"';



>         $this->seek($s);
> 
>         return false;


            $out = [Type::T_STRING, $delim, $content];

> 

>     /**
            return true;
>      * @param string $out
        }
>      * @param bool   $inKeywords

>      *
        $this->seek($s);
>      * @return bool

>      */
        return false;
>     protected function matchEscapeCharacter(&$out, $inKeywords = false)
    }
>     {

>         $s = $this->count;
    /**
>         if ($this->match('[a-f0-9]', $m, false)) {
     * Parse keyword or interpolation
>             $hex = $m[0];
     *
> 
     * @param array   $out
>             for ($i = 5; $i--;) {
     * @param boolean $restricted
>                 if ($this->match('[a-f0-9]', $m, false)) {
     *
>                     $hex .= $m[0];
     * @return boolean
>                 } else {
     */
>                     break;



<             $out = [Type::T_STRING, $delim, $content];



>             // CSS allows Unicode escape sequences to be followed by a delimiter space
>             // (necessary in some cases for shorter sequences to disambiguate their end)
>             $this->matchChar(' ', false);
> 
>             $value = hexdec($hex);
> 
>             if (!$inKeywords && ($value == 0 || ($value >= 0xD800 && $value <= 0xDFFF) || $value >= 0x10FFFF)) {
>                 $out = "\xEF\xBF\xBD"; // "\u{FFFD}" but with a syntax supported on PHP 5
>             } elseif ($value < 0x20) {
>                 $out = Util::mbChr($value);
>             } else {
>                 $out = Util::mbChr($value);
>             }


    {

>         if ($this->match('.', $m, false)) {
        $parts = [];
>             if ($inKeywords && in_array($m[0], ["'",'"','@','&',' ','\\',':','/','%'])) {




>                 return false;
        $oldWhite = $this->eatWhiteDefault;
>             }
        $this->eatWhiteDefault = false;
>             $out = $m[0];

> 
        for (;;) {
>             return true;
            if ($restricted ? $this->restrictedKeyword($key) : $this->keyword($key)) {
>         }



<      * @param boolean $restricted



>      * @param bool  $restricted



<      * @return boolean



>      * @return bool


            }

            if ($this->interpolation($inter)) {
                $parts[] = $inter;
                continue;
            }

            break;
        }

        $this->eatWhiteDefault = $oldWhite;

        if (! $parts) {
            return false;
        }

        if ($this->eatWhiteDefault) {
            $this->whitespace();
        }

        $out = $parts;

        return true;
    }

    /**
     * Parse an unbounded string stopped by $end
     *
     * @param string $end
     * @param array  $out

<      * @param string $nestingOpen



>      * @param string $nestOpen
>      * @param string $nestClose
>      * @param bool   $rtrim
>      * @param string $disallow


     *

<      * @return boolean



>      * @return bool


     */

<     protected function openString($end, &$out, $nestingOpen = null)



>     protected function openString($end, &$out, $nestOpen = null, $nestClose = null, $rtrim = true, $disallow = null)


    {
        $oldWhite = $this->eatWhiteDefault;
        $this->eatWhiteDefault = false;


<         $patt = '(.*?)([\'"]|#\{|' . $this->pregQuote($end) . '|' . static::$commentPattern . ')';



>         if ($nestOpen && ! $nestClose) {
>             $nestClose = $end;
>         }
> 
>         $patt = ($disallow ? '[^' . $this->pregQuote($disallow) . ']' : '.');
>         $patt = '(' . $patt . '*?)([\'"]|#\{|'
>             . $this->pregQuote($end) . '|'
>             . (($nestClose && $nestClose !== $end) ? $this->pregQuote($nestClose) . '|' : '')
>             . static::$commentPattern . ')';



        $nestingLevel = 0;

        $content = [];

        while ($this->match($patt, $m, false)) {
            if (isset($m[1]) && $m[1] !== '') {
                $content[] = $m[1];


<                 if ($nestingOpen) {
<                     $nestingLevel += substr_count($m[1], $nestingOpen);



>                 if ($nestOpen) {
>                     $nestingLevel += substr_count($m[1], $nestOpen);


                }
            }

            $tok = $m[2];


<             $this->count-= strlen($tok);



>             $this->count -= \strlen($tok);




<             if ($tok === $end && ! $nestingLevel--) {



>             if ($tok === $end && ! $nestingLevel) {


                break;
            }


<             if (($tok === "'" || $tok === '"') && $this->string($str)) {



>             if ($tok === $nestClose) {
>                 $nestingLevel--;
>             }
> 
>             if (($tok === "'" || $tok === '"') && $this->string($str, true)) {


                $content[] = $str;
                continue;
            }

            if ($tok === '#{' && $this->interpolation($inter)) {
                $content[] = $inter;
                continue;
            }

            $content[] = $tok;

<             $this->count+= strlen($tok);



>             $this->count += \strlen($tok);


        }

        $this->eatWhiteDefault = $oldWhite;


<         if (! $content) {



>         if (! $content || $tok !== $end) {


            return false;
        }

        // trim the end

<         if (is_string(end($content))) {
<             $content[count($content) - 1] = rtrim(end($content));



>         if ($rtrim && \is_string(end($content))) {
>             $content[\count($content) - 1] = rtrim(end($content));


        }

        $out = [Type::T_STRING, '', $content];

        return true;
    }

    /**
     * Parser interpolation
     *
     * @param string|array $out

<      * @param boolean      $lookWhite save information about whitespace before and after



>      * @param bool         $lookWhite save information about whitespace before and after


     *

<      * @return boolean



>      * @return bool


     */
    protected function interpolation(&$out, $lookWhite = true)
    {
        $oldWhite = $this->eatWhiteDefault;

>         $allowVars = $this->allowVars;
        $this->eatWhiteDefault = true;
>         $this->allowVars = true;



        $s = $this->count;


<         if ($this->literal('#{', 2) && $this->valueList($value) && $this->matchChar('}', false)) {



>         if (
>             $this->literal('#{', 2) &&
>             $this->valueList($value) &&
>             $this->matchChar('}', false)
>         ) {


            if ($value === [Type::T_SELF]) {
                $out = $value;
            } else {
                if ($lookWhite) {
                    $left = ($s > 0 && preg_match('/\s/', $this->buffer[$s - 1])) ? ' ' : '';

<                     $right = preg_match('/\s/', $this->buffer[$this->count]) ? ' ': '';



>                     $right = (
>                         ! empty($this->buffer[$this->count]) &&
>                         preg_match('/\s/', $this->buffer[$this->count])
>                     ) ? ' ' : '';


                } else {
                    $left = $right = false;
                }

                $out = [Type::T_INTERPOLATE, $value, $left, $right];
            }

            $this->eatWhiteDefault = $oldWhite;

>             $this->allowVars = $allowVars;



            if ($this->eatWhiteDefault) {
                $this->whitespace();
            }

            return true;
        }

        $this->seek($s);

        $this->eatWhiteDefault = $oldWhite;

>         $this->allowVars = $allowVars;



        return false;
    }

    /**
     * Parse property name (as an array of parts or a string)
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function propertyName(&$out)
    {
        $parts = [];

        $oldWhite = $this->eatWhiteDefault;
        $this->eatWhiteDefault = false;

        for (;;) {
            if ($this->interpolation($inter)) {
                $parts[] = $inter;
                continue;
            }

            if ($this->keyword($text)) {
                $parts[] = $text;
                continue;
            }

            if (! $parts && $this->match('[:.#]', $m, false)) {
                // css hacks
                $parts[] = $m[0];
                continue;
            }

            break;
        }

        $this->eatWhiteDefault = $oldWhite;

        if (! $parts) {
            return false;
        }

        // match comment hack

<         if (preg_match(
<             static::$whitePattern,
<             $this->buffer,
<             $m,
<             null,
<             $this->count
<         )) {



>         if (preg_match(static::$whitePattern, $this->buffer, $m, 0, $this->count)) {


            if (! empty($m[0])) {
                $parts[] = $m[0];

<                 $this->count += strlen($m[0]);



>                 $this->count += \strlen($m[0]);


            }
        }

        $this->whitespace(); // get any extra whitespace

        $out = [Type::T_STRING, '', $parts];

        return true;
    }

    /**

>      * Parse custom property name (as an array of parts or a string)
     * Parse comma separated selector list
>      *
     *
>      * @param array $out
     * @param array   $out
>      *
     * @param boolean $subSelector
>      * @return bool
     *
>      */
     * @return boolean
>     protected function customProperty(&$out)
     */
>     {
    protected function selectors(&$out, $subSelector = false)
>         $s = $this->count;
    {
> 
        $s = $this->count;
>         if (! $this->literal('--', 2, false)) {
        $selectors = [];
>             return false;

>         }
        while ($this->selector($sel, $subSelector)) {
> 
            $selectors[] = $sel;
>         $parts = ['--'];

> 
            if (! $this->matchChar(',', true)) {
>         $oldWhite = $this->eatWhiteDefault;
                break;
>         $this->eatWhiteDefault = false;
            }
> 

>         for (;;) {
            while ($this->matchChar(',', true)) {
>             if ($this->interpolation($inter)) {
                ; // ignore extra
>                 $parts[] = $inter;
            }
>                 continue;
        }
>             }

> 
        if (! $selectors) {
>             if ($this->matchChar('&', false)) {
            $this->seek($s);
>                 $parts[] = [Type::T_SELF];

>                 continue;
            return false;
>             }
        }
> 

>             if ($this->variable($var)) {
        $out = $selectors;
>                 $parts[] = $var;

>                 continue;
        return true;
>             }
    }
> 

>             if ($this->keyword($text)) {
    /**
>                 $parts[] = $text;
     * Parse whitespace separated selector list
>                 continue;
     *
>             }
     * @param array   $out
> 
     * @param boolean $subSelector
>             break;
     *
>         }
     * @return boolean
> 
     */
>         $this->eatWhiteDefault = $oldWhite;
    protected function selector(&$out, $subSelector = false)
> 
    {
>         if (\count($parts) == 1) {
        $selector = [];
>             $this->seek($s);

> 
        for (;;) {
>             return false;
            $s = $this->count;
>         }

> 
            if ($this->match('[>+~]+', $m, true)) {
>         $this->whitespace(); // get any extra whitespace
                if ($subSelector && is_string($subSelector) && strpos($subSelector, 'nth-') === 0 &&
> 
                    $m[0] === '+' && $this->match("(\d+|n\b)", $counter)
>         $out = [Type::T_STRING, '', $parts];
                ) {
> 
                    $this->seek($s);
>         return true;
                } else {
>     }
                    $selector[] = [$m[0]];
> 
                    continue;
>     /**



<      * @param boolean $subSelector



>      * @param string|bool $subSelector



<      * @return boolean



>      * @return bool



<      * @param boolean $subSelector



>      * @param string|bool $subSelector



<      * @return boolean



>      * @return bool


                $selector[] = $part;

>         $discardComments = $this->discardComments;
                $this->match('\s+', $m);
>         $this->discardComments = true;
                continue;
> 



<                 if ($subSelector && is_string($subSelector) && strpos($subSelector, 'nth-') === 0 &&



>                 if (
>                     $subSelector && \is_string($subSelector) && strpos($subSelector, 'nth-') === 0 &&



<                 $this->match('\s+', $m);
<                 continue;
<             }
< 
<             if ($this->match('\/[^\/]+\/', $m, true)) {
<                 $selector[] = [$m[0]];



>                 $this->whitespace();


            break;
        }


>         $this->discardComments = $discardComments;
        if (! $selector) {
> 


            return false;
        }

        $out = $selector;

        return true;
    }

    /**

>      * parsing escaped chars in selectors:
     * Parse the parts that make up a selector
>      * - escaped single chars are kept escaped in the selector but in a normalized form
     *
>      *   (if not in 0-9a-f range as this would be ambigous)
     * {@internal
>      * - other escaped sequences (multibyte chars or 0-9a-f) are kept in their initial escaped form,
     *     div[yes=no]#something.hello.world:nth-child(-2n+1)%placeholder
>      *   normalized to lowercase
     * }}
>      *
     *
>      * TODO: this is a fallback solution. Ideally escaped chars in selectors should be encoded as the genuine chars,
     * @param array   $out
>      * and escaping added when printing in the Compiler, where/if it's mandatory
     * @param boolean $subSelector
>      * - but this require a better formal selector representation instead of the array we have now
     *
>      *
     * @return boolean
>      * @param string $out
     */
>      * @param bool   $keepEscapedNumber
    protected function selectorSingle(&$out, $subSelector = false)
>      *
    {
>      * @return bool
        $oldWhite = $this->eatWhiteDefault;
>      */
        $this->eatWhiteDefault = false;
>     protected function matchEscapeCharacterInSelector(&$out, $keepEscapedNumber = false)

>     {
        $parts = [];
>         $s_escape = $this->count;

>         if ($this->match('\\\\', $m)) {
        if ($this->matchChar('*', false)) {
>             $out = '\\' . $m[0];
            $parts[] = '*';
>             return true;
        }
>         }

> 
        for (;;) {
>         if ($this->matchEscapeCharacter($escapedout, true)) {
            if (! isset($this->buffer[$this->count])) {
>             if (strlen($escapedout) === 1) {
                break;
>                 if (!preg_match(",\w,", $escapedout)) {
            }
>                     $out = '\\' . $escapedout;

>                     return true;
            $s = $this->count;
>                 } elseif (! $keepEscapedNumber || ! \is_numeric($escapedout)) {
            $char = $this->buffer[$this->count];
>                     $out = $escapedout;

>                     return true;
            // see if we can stop early
>                 }
            if ($char === '{' || $char === ',' || $char === ';' || $char === '}' || $char === '@') {
>             }
                break;
>             $escape_sequence = rtrim(substr($this->buffer, $s_escape, $this->count - $s_escape));
            }
>             if (strlen($escape_sequence) < 6) {

>                 $escape_sequence .= ' ';
            // parsing a sub selector in () stop with the closing )
>             }
            if ($subSelector && $char === ')') {
>             $out = '\\' . strtolower($escape_sequence);
                break;
>             return true;
            }
>         }

>         if ($this->match('\\S', $m)) {
            //self
>             $out = '\\' . $m[0];
            switch ($char) {
>             return true;
                case '&':
>         }
                    $parts[] = Compiler::$selfSelector;
> 
                    $this->count++;
> 
                    continue 2;
>         return false;

>     }
                case '.':
> 
                    $parts[] = '.';
>     /**



<      * @param boolean $subSelector



>      * @param string|bool $subSelector



<      * @return boolean



>      * @return bool




>                     ! $this->cssOnly || $this->assertPlainCssValid(false, $s);


                case '|':
                    $parts[] = '|';
                    $this->count++;
                    continue 2;
            }


<             if ($char === '\\' && $this->match('\\\\\S', $m)) {
<                 $parts[] = $m[0];



>             // handling of escaping in selectors : get the escaped char
>             if ($char === '\\') {
>                 $this->count++;
>                 if ($this->matchEscapeCharacterInSelector($escaped, true)) {
>                     $parts[] = $escaped;


                continue;
            }

>                 $this->count--;

>             }


            if ($char === '%') {
                $this->count++;

                if ($this->placeholder($placeholder)) {
                    $parts[] = '%';
                    $parts[] = $placeholder;

>                     ! $this->cssOnly || $this->assertPlainCssValid(false, $s);


                    continue;
                }

                break;
            }

            if ($char === '#') {
                if ($this->interpolation($inter)) {
                    $parts[] = $inter;

>                     ! $this->cssOnly || $this->assertPlainCssValid(false, $s);


                    continue;
                }

                $parts[] = '#';
                $this->count++;
                continue;
            }

            // a pseudo selector
            if ($char === ':') {
                if ($this->buffer[$this->count + 1] === ':') {
                    $this->count += 2;
                    $part = '::';
                } else {
                    $this->count++;
                    $part = ':';
                }

                if ($this->mixedKeyword($nameParts, true)) {
                    $parts[] = $part;

                    foreach ($nameParts as $sub) {
                        $parts[] = $sub;
                    }

                    $ss = $this->count;


<                     if ($nameParts === ['not'] || $nameParts === ['is'] ||
<                         $nameParts === ['has'] || $nameParts === ['where'] ||



>                     if (
>                         $nameParts === ['not'] ||
>                         $nameParts === ['is'] ||
>                         $nameParts === ['has'] ||
>                         $nameParts === ['where'] ||


                        $nameParts === ['slotted'] ||

<                         $nameParts === ['nth-child'] || $nameParts == ['nth-last-child'] ||
<                         $nameParts === ['nth-of-type'] || $nameParts == ['nth-last-of-type']



>                         $nameParts === ['nth-child'] ||
>                         $nameParts === ['nth-last-child'] ||
>                         $nameParts === ['nth-of-type'] ||
>                         $nameParts === ['nth-last-of-type']


                    ) {

<                         if ($this->matchChar('(', true) &&



>                         if (
>                             $this->matchChar('(', true) &&


                          ($this->selectors($subs, reset($nameParts)) || true) &&
                          $this->matchChar(')')
                        ) {
                            $parts[] = '(';

                            while ($sub = array_shift($subs)) {
                                while ($ps = array_shift($sub)) {
                                    foreach ($ps as &$p) {
                                        $parts[] = $p;
                                    }


<                                     if (count($sub) && reset($sub)) {



>                                     if (\count($sub) && reset($sub)) {


                                        $parts[] = ' ';
                                    }
                                }


<                                 if (count($subs) && reset($subs)) {



>                                 if (\count($subs) && reset($subs)) {


                                    $parts[] = ', ';
                                }
                            }

                            $parts[] = ')';
                        } else {
                            $this->seek($ss);
                        }

<                     } else {
<                         if ($this->matchChar('(') &&



>                     } elseif (
>                         $this->matchChar('(', true) &&


                          ($this->openString(')', $str, '(') || true) &&
                          $this->matchChar(')')
                        ) {
                            $parts[] = '(';

                            if (! empty($str)) {
                                $parts[] = $str;
                            }

                            $parts[] = ')';
                        } else {
                            $this->seek($ss);
                        }

<                     }



                    continue;
                }
            }

            $this->seek($s);

            // 2n+1

<             if ($subSelector && is_string($subSelector) && strpos($subSelector, 'nth-') === 0) {



>             if ($subSelector && \is_string($subSelector) && strpos($subSelector, 'nth-') === 0) {


                if ($this->match("(\s*(\+\s*|\-\s*)?(\d+|n|\d+n))+", $counter)) {
                    $parts[] = $counter[0];
                    //$parts[] = str_replace(' ', '', $counter[0]);
                    continue;
                }
            }

            $this->seek($s);

            // attribute selector

<             if ($char === '[' &&



>             if (
>                 $char === '[' &&


                $this->matchChar('[') &&
                ($this->openString(']', $str, '[') || true) &&
                $this->matchChar(']')
            ) {
                $parts[] = '[';

                if (! empty($str)) {
                    $parts[] = $str;
                }

                $parts[] = ']';
                continue;
            }

            $this->seek($s);

            // for keyframes
            if ($this->unit($unit)) {
                $parts[] = $unit;
                continue;
            }


<             if ($this->restrictedKeyword($name)) {



>             if ($this->restrictedKeyword($name, false, true)) {


                $parts[] = $name;
                continue;
            }

            break;
        }

        $this->eatWhiteDefault = $oldWhite;

        if (! $parts) {
            return false;
        }

        $out = $parts;

        return true;
    }

    /**
     * Parse a variable
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function variable(&$out)
    {
        $s = $this->count;


<         if ($this->matchChar('$', false) && $this->keyword($name)) {



>         if (
>             $this->matchChar('$', false) &&
>             $this->keyword($name)
>         ) {
>             if ($this->allowVars) {


            $out = [Type::T_VARIABLE, $name];

>             } else {

>                 $out = [Type::T_KEYWORD, '$' . $name];
            return true;
>             }


        }

        $this->seek($s);

        return false;
    }

    /**
     * Parse a keyword
     *
     * @param string  $word

<      * @param boolean $eatWhitespace



>      * @param bool   $eatWhitespace
>      * @param bool   $inSelector


     *

<      * @return boolean



>      * @return bool


     */

<     protected function keyword(&$word, $eatWhitespace = null)



>     protected function keyword(&$word, $eatWhitespace = null, $inSelector = false)


    {

<         if ($this->match(



>         $s = $this->count;
>         $match = $this->match(


            $this->utf8

<                 ? '(([\pL\w\x{00A0}-\x{10FFFF}_\-\*!"\']|[\\\\].)([\pL\w\x{00A0}-\x{10FFFF}\-_"\']|[\\\\].)*)'
<                 : '(([\w_\-\*!"\']|[\\\\].)([\w\-_"\']|[\\\\].)*)',



>                 ? '(([\pL\w\x{00A0}-\x{10FFFF}_\-\*!"\']|\\\\[a-f0-9]{6} ?|\\\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\\\].)([\pL\w\x{00A0}-\x{10FFFF}\-_"\']|\\\\[a-f0-9]{6} ?|\\\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\\\].)*)'
>                 : '(([\w_\-\*!"\']|\\\\[a-f0-9]{6} ?|\\\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\\\].)([\w\-_"\']|\\\\[a-f0-9]{6} ?|\\\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\\\].)*)',


            $m,

<             $eatWhitespace
<         )) {



>             false
>         );
> 
>         if ($match) {


            $word = $m[1];


>             // handling of escaping in keyword : get the escaped char
            return true;
>             if (strpos($word, '\\') !== false) {
        }
>                 $send = $this->count;

>                 $escapedWord = [];
        return false;
>                 $this->seek($s);
    }
>                 $previousEscape = false;

>                 while ($this->count < $send) {
    /**
>                     $char = $this->buffer[$this->count];
     * Parse a keyword that should not start with a number
>                     $this->count++;
     *
>                     if (
     * @param string  $word
>                         $this->count < $send
     * @param boolean $eatWhitespace
>                         && $char === '\\'
     *
>                         && !$previousEscape
     * @return boolean
>                         && (
     */
>                             $inSelector ?
    protected function restrictedKeyword(&$word, $eatWhitespace = null)
>                                 $this->matchEscapeCharacterInSelector($out)
    {
>                                 :
        $s = $this->count;
>                                 $this->matchEscapeCharacter($out, true)

>                         )
        if ($this->keyword($word, $eatWhitespace) && (ord($word[0]) > 57 || ord($word[0]) < 48)) {
>                     ) {
            return true;
>                         $escapedWord[] = $out;
        }
>                     } else {

>                         if ($previousEscape) {
        $this->seek($s);
>                             $previousEscape = false;

>                         } elseif ($char === '\\') {
        return false;
>                             $previousEscape = true;
    }
>                         }

>                         $escapedWord[] = $char;
    /**
>                     }
     * Parse a placeholder
>                 }
     *
> 
     * @param string|array $placeholder
>                 $word = implode('', $escapedWord);
     *
>             }
     * @return boolean
> 
     */
>             if (is_null($eatWhitespace) ? $this->eatWhiteDefault : $eatWhitespace) {
    protected function placeholder(&$placeholder)
>                 $this->whitespace();
    {
>             }
        if ($this->match(
> 



<      * @param boolean $eatWhitespace



>      * @param bool   $eatWhitespace
>      * @param bool   $inSelector



<      * @return boolean



>      * @return bool



<     protected function restrictedKeyword(&$word, $eatWhitespace = null)



>     protected function restrictedKeyword(&$word, $eatWhitespace = null, $inSelector = false)



<         if ($this->keyword($word, $eatWhitespace) && (ord($word[0]) > 57 || ord($word[0]) < 48)) {



>         if ($this->keyword($word, $eatWhitespace, $inSelector) && (\ord($word[0]) > 57 || \ord($word[0]) < 48)) {



<      * @return boolean



>      * @return bool



<         if ($this->match(



>         $match = $this->match(



<         )) {



>         );
> 
>         if ($match) {


            return true;
        }

        if ($this->interpolation($placeholder)) {
            return true;
        }

        return false;
    }

    /**
     * Parse a url
     *
     * @param array $out
     *

<      * @return boolean



>      * @return bool


     */
    protected function url(&$out)
    {

<         if ($this->match('(url\(\s*(["\']?)([^)]+)\2\s*\))', $m)) {
<             $out = [Type::T_STRING, '', ['url(' . $m[2] . $m[3] . $m[2] . ')']];



>         if ($this->literal('url(', 4)) {
>             $s = $this->count;
> 
>             if (
>                 ($this->string($out) || $this->spaceList($out)) &&
>                 $this->matchChar(')')
>             ) {
>                 $out = [Type::T_STRING, '', ['url(', $out, ')']];



            return true;
        }


>             $this->seek($s);
        return false;
> 
    }
>             if (

>                 $this->openString(')', $out) &&
    /**
>                 $this->matchChar(')')
     * Consume an end of statement delimiter
>             ) {
     *
>                 $out = [Type::T_STRING, '', ['url(', $out, ')']];
     * @return boolean
> 
     */
>                 return true;
    protected function end()
>             }
    {
>         }
        if ($this->matchChar(';')) {
> 


            return true;

>      * @param bool $eatWhitespace



<      * @return boolean



>      * @return bool



<     protected function end()



>     protected function end($eatWhitespace = null)



<         if ($this->matchChar(';')) {



>         if ($this->matchChar(';', $eatWhitespace)) {



<         if ($this->count === strlen($this->buffer) || $this->buffer[$this->count] === '}') {



>         if ($this->count === \strlen($this->buffer) || $this->buffer[$this->count] === '}') {


            return true;
        }

        return false;
    }

    /**
     * Strip assignment flag from the list
     *
     * @param array $value
     *
     * @return array
     */
    protected function stripAssignmentFlags(&$value)
    {
        $flags = [];


<         for ($token = &$value; $token[0] === Type::T_LIST && ($s = count($token[2])); $token = &$lastNode) {



>         for ($token = &$value; $token[0] === Type::T_LIST && ($s = \count($token[2])); $token = &$lastNode) {


            $lastNode = &$token[2][$s - 1];


<             while ($lastNode[0] === Type::T_KEYWORD && in_array($lastNode[1], ['!default', '!global'])) {



>             while ($lastNode[0] === Type::T_KEYWORD && \in_array($lastNode[1], ['!default', '!global'])) {


                array_pop($token[2]);

                $node     = end($token[2]);
                $token    = $this->flattenList($token);
                $flags[]  = $lastNode[1];
                $lastNode = $node;
            }
        }

        return $flags;
    }

    /**
     * Strip optional flag from selector list
     *
     * @param array $selectors
     *
     * @return string
     */
    protected function stripOptionalFlag(&$selectors)
    {
        $optional = false;
        $selector = end($selectors);
        $part     = end($selector);

        if ($part === ['!optional']) {

<             array_pop($selectors[count($selectors) - 1]);



>             array_pop($selectors[\count($selectors) - 1]);



            $optional = true;
        }

        return $optional;
    }

    /**
     * Turn list of length 1 into value type
     *
     * @param array $value
     *
     * @return array
     */
    protected function flattenList($value)
    {

<         if ($value[0] === Type::T_LIST && count($value[2]) === 1) {



>         if ($value[0] === Type::T_LIST && \count($value[2]) === 1) {


            return $this->flattenList($value[2][0]);
        }

        return $value;
    }

    /**

<      * @deprecated
<      *
<      * {@internal
<      *     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 = null;
< 
<         if (! $this->match('(' . $validChars . '*?)' . $this->pregQuote($what), $m, ! $until)) {
<             return false;
<         }
< 
<         if ($until) {
<             $this->count -= strlen($what); // give back $what
<         }
< 
<         $out = $m[1];
< 
<         return true;
<     }
< 
<     /**
<      * @deprecated
<      */
<     protected function show()
<     {
<         if ($this->peek("(.*?)(\n|$)", $m, $this->count)) {
<             return $m[1];
<         }
< 
<         return '';
<     }
< 
<     /**


     * Quote regular expression
     *
     * @param string $what
     *
     * @return string
     */
    private function pregQuote($what)
    {
        return preg_quote($what, '/');
    }

    /**
     * Extract line numbers from buffer
     *
     * @param string $buffer
     */
    private function extractLineNumbers($buffer)
    {
        $this->sourcePositions = [0 => 0];
        $prev = 0;

        while (($pos = strpos($buffer, "\n", $prev)) !== false) {
            $this->sourcePositions[] = $pos;
            $prev = $pos + 1;
        }


<         $this->sourcePositions[] = strlen($buffer);



>         $this->sourcePositions[] = \strlen($buffer);



        if (substr($buffer, -1) !== "\n") {

<             $this->sourcePositions[] = strlen($buffer) + 1;



>             $this->sourcePositions[] = \strlen($buffer) + 1;


        }
    }

    /**
     * Get source line number and column (given character position in the buffer)
     *

<      * @param integer $pos



>      * @param int $pos


     *
     * @return array
     */
    private function getSourcePosition($pos)
    {
        $low = 0;

<         $high = count($this->sourcePositions);



>         $high = \count($this->sourcePositions);



        while ($low < $high) {
            $mid = (int) (($high + $low) / 2);

            if ($pos < $this->sourcePositions[$mid]) {
                $high = $mid - 1;
                continue;
            }

            if ($pos >= $this->sourcePositions[$mid + 1]) {
                $low = $mid + 1;
                continue;
            }

            return [$mid + 1, $pos - $this->sourcePositions[$mid]];
        }

        return [$low + 1, $pos - $this->sourcePositions[$low]];
    }

    /**

<      * Save internal encoding



>      * Save internal encoding of mbstring
>      *
>      * When mbstring.func_overload is used to replace the standard PHP string functions,
>      * this method configures the internal encoding to a single-byte one so that the
>      * behavior matches the normal behavior of PHP string functions while using the parser.
>      * The existing internal encoding is saved and will be restored when calling {@see restoreEncoding}.
>      *
>      * If mbstring.func_overload is not used (or does not override string functions), this method is a no-op.
>      *
>      * @return void


     */
    private function saveEncoding()
    {

<         if (version_compare(PHP_VERSION, '7.2.0') >= 0) {
<             return;
<         }
< 
<         // deprecated in PHP 7.2
<         $iniDirective = 'mbstring.func_overload';
< 
<         if (extension_loaded('mbstring') && ini_get($iniDirective) & 2) {



>         if (\PHP_VERSION_ID < 80000 && \extension_loaded('mbstring') && (2 & (int) ini_get('mbstring.func_overload')) > 0) {


            $this->encoding = mb_internal_encoding();

            mb_internal_encoding('iso-8859-1');
        }
    }

    /**
     * Restore internal encoding

>      *
     */
>      * @return void


    private function restoreEncoding()
    {

<         if (extension_loaded('mbstring') && $this->encoding) {



>         if (\extension_loaded('mbstring') && $this->encoding) {


            mb_internal_encoding($this->encoding);
        }
    }
}