/**
* Try to get next argument. Return false if there are no arguments left before ")"
* @return null|mixed
*/
private function getNextArgumentValue()
{
$validArgumentTypes = array(Lexer::T_STRING, Lexer::T_NUMBER, Lexer::T_BOOLEAN, Lexer::T_NULL);
if ($this->lexer->isNextToken(Lexer::T_CLOSE_PARENTHESIS)) {
return;
}
if ($this->lexer->isNextToken(Lexer::T_OPEN_CURLY_BRACE)) {
return $this->getArrayArgument();
}
if ($this->lexer->isNextToken(Lexer::T_EXPANDER_NAME)) {
return $this->getNextExpanderNode();
}
if (!$this->lexer->isNextTokenAny($validArgumentTypes)) {
$this->unexpectedSyntaxError($this->lexer->lookahead, "string, number, boolean or null argument");
}
$tokenType = $this->lexer->lookahead['type'];
$argument = $this->lexer->lookahead['value'];
$this->lexer->moveNext();
if ($tokenType === Lexer::T_NULL) {
$argument = self::NULL_VALUE;
}
return $argument;
}
