public function push(Node $item)
{
return parent::push($item);
}
/**
* Parse optional apply rule.
* Rule: (APPLY WORD)?
* @param TokenStream $tokens
* @param Stack $stack
* @return bool True
*/
protected function parseApply(TokenStream $tokens, Stack $stack)
{
if ($tokens->begin() && $stack->begin() && $this->consumeToken(Token::APPLY, $tokens, $stack) && $this->parseToken(Token::WORD, $tokens, $stack, self::CONTEXT_FUNC) && $tokens->commit() && $stack->commit() || $tokens->rollback() || $stack->rollback()) {
// Basically this is a function operator.
$operator = $stack->pop();
$operand = $stack->pop();
$stack->push(new UnaryNode($operator, $operand));
}
// Always return true since this is an optional rule.
return true;
}
