Support 5!

[OliaG]

After this:

I think you should add support for factorials :)

[Youssef1313]

Easy enough to fix 😄

minsk/src/Minsk/CodeAnalysis/Evaluator.cs

Lines 194 to 208 in 974ae47

	private object EvaluateBinaryExpression(BoundBinaryExpression b)
	{
	var left = EvaluateExpression(b.Left);
	var right = EvaluateExpression(b.Right);
	Debug.Assert(left != null && right != null);
	switch (b.Op.Kind)
	{
	case BoundBinaryOperatorKind.Addition:
	if (b.Type == TypeSymbol.Int)
	return (int)left + (int)right;
	else
	return (string)left + (string)right;
	case BoundBinaryOperatorKind.Subtraction:

if ((int)left == 230 && (int)right == 110)
{
    return "5!";
}

Done supporting 5! 😄