/**
* Create a new instance
* @param string $op the operator
*/
public function __construct($op)
{
parent::__construct(Token::TOKEN_OPERATOR);
if ($op == null) {
throw new ExpressionException("Operator is unknown for token.");
}
$this->operator = $op;
}
private function getOperator($symbol)
{
$op = null;
if ($this->userOperators != null && array_key_exists($symbol, $this->userOperators)) {
$op = $this->userOperators[$symbol];
}
if ($op == null && strlen($symbol) == 1) {
$argc = $this->lastToken == null || $this->lastToken->getType() == Token::TOKEN_OPERATOR || $this->lastToken->getType() == Token::TOKEN_PARENTHESES_OPEN ? 1 : 2;
$op = Operators::getBuiltinOperator($symbol[0], $argc);
}
return $op;
}