Symfony Profiler

<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig\TokenParser;
use Twig\Error\SyntaxError;
use Twig\Node\BodyNode;
use Twig\Node\EmptyNode;
use Twig\Node\Expression\ArrayExpression;
use Twig\Node\Expression\ConstantExpression;
use Twig\Node\Expression\Unary\NegUnary;
use Twig\Node\Expression\Unary\PosUnary;
use Twig\Node\Expression\Variable\LocalVariable;
use Twig\Node\MacroNode;
use Twig\Node\Node;
use Twig\Token;
/**
* Defines a macro.
*
* {% macro input(name, value, type, size) %}
* <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
* {% endmacro %}
*
* @internal
*/
final class MacroTokenParser extends AbstractTokenParser
{
public function parse(Token $token): Node
{
$lineno = $token->getLine();
$stream = $this->parser->getStream();
$name = $stream->expect(Token::NAME_TYPE)->getValue();
$arguments = $this->parseDefinition();
$stream->expect(Token::BLOCK_END_TYPE);
$this->parser->pushLocalScope();
$body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
if ($token = $stream->nextIf(Token::NAME_TYPE)) {
$value = $token->getValue();
if ($value != $name) {
throw new SyntaxError(\sprintf('Expected endmacro for macro "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getSourceContext());
}
}
$this->parser->popLocalScope();
$stream->expect(Token::BLOCK_END_TYPE);
$this->parser->setMacro($name, new MacroNode($name, new BodyNode([$body]), $arguments, $lineno));
return new EmptyNode($lineno);
}
public function decideBlockEnd(Token $token): bool
{
return $token->test('endmacro');
}
public function getTag(): string
{
return 'macro';
}
private function parseDefinition(): ArrayExpression
{
$arguments = new ArrayExpression([], $this->parser->getCurrentToken()->getLine());
$stream = $this->parser->getStream();
$stream->expect(Token::OPERATOR_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
while (!$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->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;
}
// checks that the node only contains "constant" elements
private function checkConstantExpression(Node $node): bool
{
if (!($node instanceof ConstantExpression || $node instanceof ArrayExpression
|| $node instanceof NegUnary || $node instanceof PosUnary
)) {
return false;
}
foreach ($node as $n) {
if (!$this->checkConstantExpression($n)) {
return false;
}
}
return true;
}
}

vendor/twig/twig/src/TokenParser/MacroTokenParser.php line 46