Function pointer argument to function template

[Kirk McDonald]

Ah! The IsExpression! I hadn't remembered that at all from when I read 
the spec. This will do nicely, thanks!

-Kirk McDonald

Tom S wrote:
> Hey there :)
> 
> I came up with this:
> 
> ----
> 
> import std.stdio;
> 
> template Deref(T) {
>         alias typeof(*T) Deref;
> }
> 
> template RetType(T) {
>         static if (is(Deref!(T) U == function)) {
>                 alias U RetType;
>         } else static assert (false);
> }
> 
> template Bar(T, U=RetType!(T)) {
>         U Bar(T t) {
>                 writefln(typeid(U));
> 
>                 // do something :P
>                 return U.init;
>         }
> }
> 
> 
> cfloat func(int a, float b) {
>         return 1.f + 0i;
> }
> 
> 
> void main() {
>         writefln(Bar(&func));
> }
> 
> 
> -- 
> Tomasz Stachowiak  /+ a.k.a. h3r3tic +/