public function parse(Parser $parser, Stream $stream)
{
$environment = $parser->getEnvironment();
$node = new TagNode($environment->getTag('for'), ['save_temp_var' => true, 'create_stack' => true, 'variables' => 1]);
$node->addChild($parser->parseExpression($stream), 'source');
$temp = $node->addChild(new TempVariableNode('element'), 'loop_variable_0');
$loopBody = $node->addChild(new RootNode(), 'loop_body');
if ($stream->current()->test(Token::IDENTIFIER, 'as')) {
$arrayNode = new ArrayNode();
$arrayNode->add($temp, new DataNode($stream->expect(Token::VARIABLE)->getValue()));
$setOperator = $parser->getEnvironment()->getBinaryOperators()->getOperator(':');
$varNode = $setOperator->createNode($temp, $arrayNode);
$loopBody->addChild(new ExpressionNode($varNode));
$stream->next();
}
$stream->expectCurrent(Token::IDENTIFIER, 'using');
$loopBody->addChild($this->helper->createRenderFunctionNode($parser->parseExpression($stream), $temp));
return $node;
}
private function parseArray()
{
$node = new ArrayNode();
$token = $this->stream->current();
//iterate over tokens
while (!$token->test(Token::PUNCTUATION, ']')) {
//Checking here allows for a trailing comma.
if ($this->stream->nextTokenIf(Token::PUNCTUATION, ']')) {
break;
}
//expressions are allowed as both array keys and values.
$value = $this->parseExpression(true);
if ($this->stream->current()->test(Token::PUNCTUATION, [':', '=>'])) {
//the previous value was a key
$key = $value;
$value = $this->parseExpression(true);
} else {
$key = null;
}
$node->add($value, $key);
$token = $this->stream->expectCurrent(Token::PUNCTUATION, [',', ']']);
}
//push array node to operand stack
$this->operandStack->push($node);
}