static switch

[Dicebot]

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

You can simply make it different overloads:

T opOpAssign(string op, T)(T x) if(op=="+" || op=="-")
{
    ...
}

T opOpAssign(string op, T)(T x) if(op=="*" || op=="/" || op=="%")
{
   ...
}

etc.