function Lexer::lexExpression

3 calls to Lexer::lexExpression()

Lexer::lexBlock in vendor/twig/twig/src/Lexer.php

Lexer::lexInterpolation in vendor/twig/twig/src/Lexer.php

Lexer::lexVar in vendor/twig/twig/src/Lexer.php

File

vendor/twig/twig/src/Lexer.php, line 316

Class

Lexer

@author Fabien Potencier <fabien@symfony.com>

Namespace

Twig

Code

private function lexExpression() : void {
    // whitespace
    if (preg_match('/\\s+/A', $this->code, $match, 0, $this->cursor)) {
        $this->moveCursor($match[0]);
        if ($this->cursor >= $this->end) {
            throw new SyntaxError(\sprintf('Unclosed "%s".', self::STATE_BLOCK === $this->state ? 'block' : 'variable'), $this->currentVarBlockLine, $this->source);
        }
    }
    // spread operator
    if ('.' === $this->code[$this->cursor] && $this->cursor + 2 < $this->end && '.' === $this->code[$this->cursor + 1] && '.' === $this->code[$this->cursor + 2]) {
        $this->pushToken(Token::SPREAD_TYPE, '...');
        $this->moveCursor('...');
    }
    elseif ('=' === $this->code[$this->cursor] && $this->cursor + 1 < $this->end && '>' === $this->code[$this->cursor + 1]) {
        $this->pushToken(Token::ARROW_TYPE, '=>');
        $this->moveCursor('=>');
    }
    elseif (preg_match($this->regexes['operator'], $this->code, $match, 0, $this->cursor)) {
        $this->pushToken(Token::OPERATOR_TYPE, preg_replace('/\\s+/', ' ', $match[0]));
        $this->moveCursor($match[0]);
    }
    elseif (preg_match(self::REGEX_NAME, $this->code, $match, 0, $this->cursor)) {
        $this->pushToken(Token::NAME_TYPE, $match[0]);
        $this->moveCursor($match[0]);
    }
    elseif (preg_match(self::REGEX_NUMBER, $this->code, $match, 0, $this->cursor)) {
        $number = (double) $match[0];
        // floats
        if (ctype_digit($match[0]) && $number <= \PHP_INT_MAX) {
            $number = (int) $match[0];
            // integers lower than the maximum
        }
        $this->pushToken(Token::NUMBER_TYPE, $number);
        $this->moveCursor($match[0]);
    }
    elseif (str_contains(self::PUNCTUATION, $this->code[$this->cursor])) {
        // opening bracket
        if (str_contains('([{', $this->code[$this->cursor])) {
            $this->brackets[] = [
                $this->code[$this->cursor],
                $this->lineno,
            ];
        }
        elseif (str_contains(')]}', $this->code[$this->cursor])) {
            if (!$this->brackets) {
                throw new SyntaxError(\sprintf('Unexpected "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
            }
            [
                $expect,
                $lineno,
            ] = array_pop($this->brackets);
            if ($this->code[$this->cursor] != strtr($expect, '([{', ')]}')) {
                throw new SyntaxError(\sprintf('Unclosed "%s".', $expect), $lineno, $this->source);
            }
        }
        $this->pushToken(Token::PUNCTUATION_TYPE, $this->code[$this->cursor]);
        ++$this->cursor;
    }
    elseif (preg_match(self::REGEX_STRING, $this->code, $match, 0, $this->cursor)) {
        $this->pushToken(Token::STRING_TYPE, $this->stripcslashes(substr($match[0], 1, -1), substr($match[0], 0, 1)));
        $this->moveCursor($match[0]);
    }
    elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, 0, $this->cursor)) {
        $this->brackets[] = [
            '"',
            $this->lineno,
        ];
        $this->pushState(self::STATE_STRING);
        $this->moveCursor($match[0]);
    }
    elseif (preg_match(self::REGEX_INLINE_COMMENT, $this->code, $match, 0, $this->cursor)) {
        $this->moveCursor($match[0]);
    }
    else {
        throw new SyntaxError(\sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->source);
    }
}