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File Content: `Lexer.php`

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace WPToolkitDependenciesIsolationPrefix\Symfony\Component\ExpressionLanguage;

/**
 * Lexes an expression.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Lexer
{
    /**
     * Tokenizes an expression.
     *
     * @throws SyntaxError
     */
    public function tokenize(string $expression) : TokenStream
    {
        $expression = \str_replace(["\r", "\n", "\t", "\v", "\f"], ' ', $expression);
        $cursor = 0;
        $tokens = [];
        $brackets = [];
        $end = \strlen($expression);
        while ($cursor < $end) {
            if (' ' == $expression[$cursor]) {
                ++$cursor;
                continue;
            }
            if (\preg_match('/
                (?(DEFINE)(?P<LNUM>[0-9]+(_[0-9]+)*))
                (?:\\.(?&LNUM)|(?&LNUM)(?:\\.(?!\\.)(?&LNUM)?)?)(?:[eE][+-]?(?&LNUM))?/Ax', $expression, $match, 0, $cursor)) {
                // numbers
                $tokens[] = new Token(Token::NUMBER_TYPE, 0 + \str_replace('_', '', $match[0]), $cursor + 1);
                $cursor += \strlen($match[0]);
            } elseif (\str_contains('([{', $expression[$cursor])) {
                // opening bracket
                $brackets[] = [$expression[$cursor], $cursor];
                $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
                ++$cursor;
            } elseif (\str_contains(')]}', $expression[$cursor])) {
                // closing bracket
                if (!$brackets) {
                    throw new SyntaxError(\sprintf('Unexpected "%s".', $expression[$cursor]), $cursor, $expression);
                }
                [$expect, $cur] = \array_pop($brackets);
                if ($expression[$cursor] != \strtr($expect, '([{', ')]}')) {
                    throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $cur, $expression);
                }
                $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
                ++$cursor;
            } elseif (\preg_match('/"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As', $expression, $match, 0, $cursor)) {
                // strings
                $tokens[] = new Token(Token::STRING_TYPE, \stripcslashes(\substr($match[0], 1, -1)), $cursor + 1);
                $cursor += \strlen($match[0]);
            } elseif (\preg_match('/(?<=^|[\\s(])starts with(?=[\\s(])|(?<=^|[\\s(])ends with(?=[\\s(])|(?<=^|[\\s(])contains(?=[\\s(])|(?<=^|[\\s(])matches(?=[\\s(])|(?<=^|[\\s(])not in(?=[\\s(])|(?<=^|[\\s(])not(?=[\\s(])|(?<=^|[\\s(])and(?=[\\s(])|\\=\\=\\=|\\!\\=\\=|(?<=^|[\\s(])or(?=[\\s(])|\\|\\||&&|\\=\\=|\\!\\=|\\>\\=|\\<\\=|(?<=^|[\\s(])in(?=[\\s(])|\\.\\.|\\*\\*|\\!|\\||\\^|&|\\<|\\>|\\+|\\-|~|\\*|\\/|%/A', $expression, $match, 0, $cursor)) {
                // operators
                $tokens[] = new Token(Token::OPERATOR_TYPE, $match[0], $cursor + 1);
                $cursor += \strlen($match[0]);
            } elseif ('?' === $expression[$cursor] && '.' === ($expression[$cursor + 1] ?? '')) {
                // null-safe
                $tokens[] = new Token(Token::PUNCTUATION_TYPE, '?.', ++$cursor);
                ++$cursor;
            } elseif ('?' === $expression[$cursor] && '?' === ($expression[$cursor + 1] ?? '')) {
                // null-coalescing
                $tokens[] = new Token(Token::PUNCTUATION_TYPE, '??', ++$cursor);
                ++$cursor;
            } elseif (\str_contains('.,?:', $expression[$cursor])) {
                // punctuation
                $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
                ++$cursor;
            } elseif (\preg_match('/[a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*/A', $expression, $match, 0, $cursor)) {
                // names
                $tokens[] = new Token(Token::NAME_TYPE, $match[0], $cursor + 1);
                $cursor += \strlen($match[0]);
            } else {
                // unlexable
                throw new SyntaxError(\sprintf('Unexpected character "%s".', $expression[$cursor]), $cursor, $expression);
            }
        }
        $tokens[] = new Token(Token::EOF_TYPE, null, $cursor + 1);
        if ($brackets) {
            [$expect, $cur] = \array_pop($brackets);
            throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $cur, $expression);
        }
        return new TokenStream($tokens, $expression);
    }
}
Name	Size	Permission
Node	---	0755
Resources	---	0755
Compiler.php	3078 bytes	0644
Expression.php	639 bytes	0644
ExpressionFunction.php	3138 bytes	0644
ExpressionFunctionProviderInterface.php	526 bytes	0644
ExpressionLanguage.php	6079 bytes	0644
Lexer.php	4682 bytes	0644
ParsedExpression.php	768 bytes	0644
Parser.php	16565 bytes	0644
SerializedParsedExpression.php	946 bytes	0644
SyntaxError.php	1292 bytes	0644
Token.php	1386 bytes	0644
TokenStream.php	2154 bytes	0644
File Content: Lexer.php

File Content: `Lexer.php`
