public override void Evaluate(Expression left, Expression right, Emit.ILGenerator ilg, ExecutionContext ec)
{
Type t = left.GetEvaluatedType(ec);
Type t2 = right.GetEvaluatedType(ec);
if (t != t2)
{
throw new NotImplementedException("Type coercion not implemented yet.");
}
if (t == typeof(string))
{
//Concatenate strings! Fun for all.
//TODO: optimize the shit out of this to determine if there is tons of concatenating going on because this is inefficient as hell for something like "lol" + "hi" + 3
//TODO: classes with operator overloading so I don't need to do special exceptions within the language code itself. I dislike that.
left.Push(ilg, ec);
right.Push(ilg, ec);
ilg.Emit(Emit.OpCodes.Call, typeof(String).GetMethod("Concat", new Type[] { typeof(string), typeof(string) }));
}
}
public override Type GetEvaluatedType(Expression left, Expression right, ExecutionContext ec)
{
Type t = left.GetEvaluatedType(ec);
Type t2 = right.GetEvaluatedType(ec);
if (t != t2)
{
throw new NotImplementedException("Type coercion not implemented yet.");
}
return t; //same type because you're adding!
}