Re: static switch

[vitamin]

On Wednesday, 5 March 2014 at 12:51:23 UTC, Dominikus Dittes
Scherkl wrote:

I wonder why there is no static switch (analogue to static if)?

Because especially if you overload a lot of operators (which is done e.g. in the definition of complex and bigint) I would think something like

T opOpAssign(string op, T)(T x) if(op=="+" || op=="-" || op=="*" || op=="/" || op=="%" || op=="^^" || op=="&" || op=="|" || op=="^" || op=="<<" || op==">>" || op==">>>")

{
   static switch(op)
   {
   case "+":
   case "-":
      ...
      break;
   case "*":
      ...
   }
}

would look much better than

{
   static if(op=="+" || op == "-")
   {
      ...
   }
   else static if(op == "*")
   {
      ...
   }
   else
   {
      ...
   }
}

use:

bool In(Args...)(string str, Args args){
        foreach(a; args)
                if(str == a)return true;
        return false;
}

class Foo{

        T opOpAssign(string op, T)(T x) if(op.In("+", "-", "*", "/",
"%", "^^", "&", "|", "^", "<<", ">>", ">>>")){
                return x;
        }
        
}