/**
* New node factory
* @param string $title
* @return Node\ArrayNode
*/
public function createNode($title = null)
{
$node = new Node\ArrayNode();
$node->setNodeTitle($title);
$this->add($node);
return $node;
}
public function parseHashExpression()
{
$this->stream->expect(Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
$node = new Node\ArrayNode();
$first = true;
while (!$this->stream->current->test(Token::PUNCTUATION_TYPE, '}')) {
if (!$first) {
$this->stream->expect(Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
// trailing ,?
if ($this->stream->current->test(Token::PUNCTUATION_TYPE, '}')) {
break;
}
}
$first = false;
// a hash key can be:
//
// * a number -- 12
// * a string -- 'a'
// * a name, which is equivalent to a string -- a
// * an expression, which must be enclosed in parentheses -- (1 + 2)
if ($this->stream->current->test(Token::STRING_TYPE) || $this->stream->current->test(Token::NAME_TYPE) || $this->stream->current->test(Token::NUMBER_TYPE)) {
$key = new Node\ConstantNode($this->stream->current->value);
$this->stream->next();
} elseif ($this->stream->current->test(Token::PUNCTUATION_TYPE, '(')) {
$key = $this->parseExpression();
} else {
$current = $this->stream->current;
throw new SyntaxError(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s"', $current->type, $current->value), $current->cursor);
}
$this->stream->expect(Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
$value = $this->parseExpression();
$node->addElement($value, $key);
}
$this->stream->expect(Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
return $node;
}
