andig / php-shunting-yard Goto Github PK

Hi there:
I'm trying to catch error to prevent php to stop if there's no parseable string, but I can't figure out how to do it ...
I've tried many options:
catch (RR\Shunt\Exception\RuntimeError | RR\Shunt\Exception\ParseError $e)
catch (ParseError $e)
catch (Exception $e)
...
but no luck ...

Any idea ? ;-)

I'm looking to enhance the parser allowing the % symbol, not as MOD, but a percentage of the previous number.

I like how Google handles this:
5 + 25% becomes 5 + (5 * 25 / 100)
5 * 25% becomes 5 * 25 / 100

To avoid collision with the "mod" operator, that has two numbers (one in the left and one in the right) , I thought about pre-parsing the string:

		$string_m = preg_replace("/\s/", "", $term);
		preg_match("/([0-9]*)([^0-9])([0-9]*)\%([^0-9])/", $string_m . " ", $m);
		if (isSet($m[2])) { // Operand + or *
			if ($m[2] == "+") {
				$string = str_replace($m[3]."%", "(".$m[1]."*".$m[3]."/100)", $string_m);
			}
			if ($m[2] == "*") {
				$string = str_replace($m[3]."%", $m[3]."/100", $string_m);
			}
		}

With this:
12 + 150 * 15% + 3 becomes 12 + 150 * 15/100 + 3
12 + 150 + 15% + 3 becomes 12 + 150 + (150*15/100) + 3

So then the Parser can continue with no problems ;-)

Would you like to include in your parser ?