function MacroTokenParser::parseDefinition

1 call to MacroTokenParser::parseDefinition()

MacroTokenParser::parse in vendor/twig/twig/src/TokenParser/MacroTokenParser.php

Parses a token and returns a node.

File

vendor/twig/twig/src/TokenParser/MacroTokenParser.php, line 72

Class

MacroTokenParser

Defines a macro.

Namespace

Twig\TokenParser

Code

private function parseDefinition() : ArrayExpression {
    $arguments = new ArrayExpression([], $this->parser
        ->getCurrentToken()
        ->getLine());
    $stream = $this->parser
        ->getStream();
    $stream->expect(Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
    while (!$stream->test(Token::PUNCTUATION_TYPE, ')')) {
        if (count($arguments)) {
            $stream->expect(Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
            // if the comma above was a trailing comma, early exit the argument parse loop
            if ($stream->test(Token::PUNCTUATION_TYPE, ')')) {
                break;
            }
        }
        $token = $stream->expect(Token::NAME_TYPE, null, 'An argument must be a name');
        $name = new LocalVariable($token->getValue(), $this->parser
            ->getCurrentToken()
            ->getLine());
        if ($token = $stream->nextIf(Token::OPERATOR_TYPE, '=')) {
            $default = $this->parser
                ->getExpressionParser()
                ->parseExpression();
        }
        else {
            $default = new ConstantExpression(null, $this->parser
                ->getCurrentToken()
                ->getLine());
            $default->setAttribute('is_implicit', true);
        }
        if (!$this->checkConstantExpression($default)) {
            throw new SyntaxError('A default value for an argument must be a constant (a boolean, a string, a number, a sequence, or a mapping).', $token->getLine(), $stream->getSourceContext());
        }
        $arguments->addElement($default, $name);
    }
    $stream->expect(Token::PUNCTUATION_TYPE, ')', 'A list of arguments must be closed by a parenthesis');
    return $arguments;
}