uuf6429 / expression-language-arrowfunc

src/ExpressionLanguage/Lexer.php

<?php

namespace uuf6429\ExpressionLanguage;

use Symfony\Component\ExpressionLanguage\Token;
use Symfony\Component\ExpressionLanguage\SyntaxError;

class Lexer extends \Symfony\Component\ExpressionLanguage\Lexer
{
    /**
     * {@inheritdoc}
     */
    public function tokenize($expression)
    {
        $expression = str_replace(array("\r", "\n", "\t", "\v", "\f"), ' ', $expression);
        $cursor = 0;
        $tokens = array();
        $brackets = array();
        $end = strlen($expression);

        while ($cursor < $end) {
            if (' ' === $expression[$cursor]) {
                ++$cursor;

                continue;
            }

            if (preg_match('/\d+(?:\.\d+)?/A', $expression, $match, null, $cursor)) {
                // numbers
                $number = (float) $match[0]; // floats
                if ($number <= PHP_INT_MAX && ctype_digit($match[0])) {
                    $number = (int) $match[0]; // integers lower than the maximum
                }
                $tokens[] = new Token(Token::NUMBER_TYPE, $number, $cursor + 1);
                $cursor += strlen($match[0]);
            } elseif (false !== strpos('([{', $expression[$cursor])) {
                // opening bracket
                $brackets[] = array($expression[$cursor], $cursor);

                $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
                ++$cursor;
            } elseif (false !== strpos(')]}', $expression[$cursor])) {
                // closing bracket
                if (empty($brackets)) {
                    throw new SyntaxError(sprintf('Unexpected "%s"', $expression[$cursor]), $cursor);
                }

                [$expect, $cur] = array_pop($brackets);

The variable $expect does not exist. Did you forget to declare it?

The variable $cur does not exist. Did you forget to declare it?

                if ($expression[$cursor] !== strtr($expect, '([{', ')]}')) {
                    throw new SyntaxError(sprintf('Unclosed "%s"', $expect), $cur);
                }

                $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
                ++$cursor;
            } elseif (preg_match('/"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/A', $expression, $match, null, $cursor)) {
                // strings
                $tokens[] = new Token(Token::STRING_TYPE, stripcslashes(substr($match[0], 1, -1)), $cursor + 1);
                $cursor += strlen($match[0]);
            } elseif (preg_match('/\->|not in(?=[\s(])|\!\=\=|not(?=[\s(])|and(?=[\s(])|\=\=\=|\>\=|or(?=[\s(])|\<\=|\*\*|\.\.|in(?=[\s(])|&&|\|\||matches|\=\=|\!\=|\*|~|%|\/|\>|\||\!|\^|&|\+|\<|\-/A', $expression, $match, null, $cursor)) {
                // operators
                $tokens[] = new Token(Token::OPERATOR_TYPE, $match[0], $cursor + 1);
                $cursor += strlen($match[0]);
            } elseif (false !== strpos('.,?:', $expression[$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, null, $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);
            }
        }

        $tokens[] = new Token(Token::EOF_TYPE, null, $cursor + 1);

        if (!empty($brackets)) {
            [$expect, $cur] = array_pop($brackets);
            throw new SyntaxError(sprintf('Unclosed "%s"', $expect), $cur);
        }

        return new TokenStream($tokens);
    }
}