public function parse(Parser $parser, Stream $stream)
{
if (!$parser->inMainScope()) {
throw new ParseException("Extends tags must be placed in the main scope. Unexpected extends tag", $stream->current()->getLine());
}
$parser->getCurrentClassNode()->setParentTemplate($parser->parseExpression($stream));
}
public function parse(Parser $parser, Stream $stream)
{
$node = new TagNode($this);
do {
$node->addChild($parser->parseExpression($stream));
} while ($stream->current()->test(Token::PUNCTUATION, ','));
return $node;
}
public function parse(Parser $parser, Stream $stream)
{
$node = new RootNode();
do {
$left = $parser->parseExpression($stream);
$stream->expectCurrent(Token::PUNCTUATION, ':');
$right = $parser->parseExpression($stream);
$setOperator = $parser->getEnvironment()->getBinaryOperators()->getOperator(':');
$varNode = $setOperator->createNode($left, $right);
$node->addChild(new ExpressionNode($varNode));
} while ($stream->current()->test(Token::PUNCTUATION, ','));
return $node;
}
private function compareToStackTop(Operator $operator)
{
$top = $this->operatorStack->top();
if ($top === null) {
return false;
}
if ($this->binaryOperators->exists($operator) && $operator === $top) {
if ($operator->isAssociativity(Operator::LEFT)) {
return true;
}
if ($operator->isAssociativity(Operator::RIGHT)) {
return false;
}
//e.g. (5 is divisible by 2 is divisible by 3) is not considered valid
$symbols = $operator->operators();
if (is_array($symbols)) {
$symbols = implode(', ', $symbols);
}
throw new ParseException("Binary operator '{$symbols}' is not associative", $this->stream->current()->getLine());
}
return $top->getPrecedence() >= $operator->getPrecedence();
}
