static switch

[Orvid King]

Well, as long as we're talking about language design, couldn't the
first be improved more by allowing something like:

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

The `in` there is my attempt to disambiguate between this type of
constraint and what I view as the most likely syntax for built-in
tuples.

On 3/5/14, Dominikus Dittes Scherkl
<Dominikus.Scherkl at continental-corporation.com> 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
>     {
>        ...
>     }
> }
>