/**
* Tests a token and returns it or throws a syntax error.
*
* @return IfwPsn_Vendor_Twig_Token
*/
public function expect($type, $value = null, $message = null)
{
$token = $this->tokens[$this->current];
if (!$token->test($type, $value)) {
$line = $token->getLine();
throw new IfwPsn_Vendor_Twig_Error_Syntax(sprintf('%sUnexpected token "%s" of value "%s" ("%s" expected%s)', $message ? $message . '. ' : '', IfwPsn_Vendor_Twig_Token::typeToEnglish($token->getType()), $token->getValue(), IfwPsn_Vendor_Twig_Token::typeToEnglish($type), $value ? sprintf(' with value "%s"', $value) : ''), $line, $this->filename);
}
$this->next();
return $token;
}
public function parseHashExpression()
{
$stream = $this->parser->getStream();
$stream->expect(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
$node = new IfwPsn_Vendor_Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
$first = true;
while (!$stream->test(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, '}')) {
if (!$first) {
$stream->expect(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
// trailing ,?
if ($stream->test(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, '}')) {
break;
}
}
$first = false;
// a hash key can be:
//
// * a number -- 12
// * a string -- 'a'
// * a name, which is equivalent to a string -- a
// * an expression, which must be enclosed in parentheses -- (1 + 2)
if (($token = $stream->nextIf(IfwPsn_Vendor_Twig_Token::STRING_TYPE)) || ($token = $stream->nextIf(IfwPsn_Vendor_Twig_Token::NAME_TYPE)) || ($token = $stream->nextIf(IfwPsn_Vendor_Twig_Token::NUMBER_TYPE))) {
$key = new IfwPsn_Vendor_Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
} elseif ($stream->test(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, '(')) {
$key = $this->parseExpression();
} else {
$current = $stream->getCurrent();
throw new IfwPsn_Vendor_Twig_Error_Syntax(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s"', IfwPsn_Vendor_Twig_Token::typeToEnglish($current->getType()), $current->getValue()), $current->getLine(), $this->parser->getFilename());
}
$stream->expect(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
$value = $this->parseExpression();
$node->addElement($value, $key);
}
$stream->expect(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
return $node;
}
