Leafo\ScssPhp\Parser::string PHP Метод

    protected function string(&$out)
    {
        $s = $this->seek();
        if ($this->literal('"', false)) {
            $delim = '"';
        } elseif ($this->literal("'", 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]);
                if ($this->interpolation($inter, false)) {
                    $content[] = $inter;
                    $hasInterpolation = true;
                } else {
                    $this->count += strlen($m[2]);
                    $content[] = '#{';
                    // ignore it
                }
            } elseif ($m[2] === '\\') {
                if ($this->literal('"', false)) {
                    $content[] = $m[2] . '"';
                } elseif ($this->literal("'", false)) {
                    $content[] = $m[2] . "'";
                } else {
                    $content[] = $m[2];
                }
            } else {
                $this->count -= strlen($delim);
                break;
                // delim
            }
        }
        $this->eatWhiteDefault = $oldWhite;
        if ($this->literal($delim)) {
            if ($hasInterpolation) {
                $delim = '"';
                foreach ($content as &$string) {
                    if ($string === "\\'") {
                        $string = "'";
                    } elseif ($string === '\\"') {
                        $string = '"';
                    }
                }
            }
            $out = [Type::T_STRING, $delim, $content];
            return true;
        }
        $this->seek($s);
        return false;
    }