static foreach and function generation

[Jean-Louis Leroy]

Consider:

module genfun;

   import std.stdio, std.format, std.traits;

   void foo(int a) { writeln("foo(%s)".format(a)); }
   void foo(int a, int b) { writeln("foo(%s, %s)".format(a, b)); }

   static foreach (fun; __traits(allMembers, genfun)) {
     static if (fun == "foo") {
       static if (is(typeof(__traits(getOverloads, genfun, fun)))) 
{
         static foreach (ovl; __traits(getOverloads, genfun, fun)) 
{
           void foobar(Parameters!ovl args) { // HERE
             write("calling ");
             foo(args); // HERE
           }
         }
       }
     }
   }

   void main()
   {
     foobar(1); // calling foo(1)
     foobar(1, 2); // calling foo(1, 2)
   }

Now I would like to change `foo` and `foobar` to calculated 
symbols where marked. I would also like to use as little string 
mixin as possible. I tried:

   static foreach (fun; __traits(allMembers, genfun)) {
     static if (fun == "foo") {
       static if (is(typeof(__traits(getOverloads, genfun, fun)))) 
{
         static foreach (ovl; __traits(getOverloads, genfun, fun)) 
{
           void mixin(fun + "bar")(Parameters!ovl args) { // 1
             write("calling ");
             mixin(fun)(args); // 2
           }
         }
       }
     }
   }

This gets me halfway there: #2 works but #1 does not.

This works:

   static foreach (fun; __traits(allMembers, genfun)) {
     static if (fun == "foo") {
       static if (is(typeof(__traits(getOverloads, genfun, fun)))) 
{
         static foreach (ovl; __traits(getOverloads, genfun, fun)) 
{
           void internal(Parameters!ovl args) {
             mixin(fun)(args);
           }
           mixin("alias %sbar = internal;".format(fun));
         }
       }
     }
   }


Does anyone see a potential problems with this? Or a better 
solution? I would like to avoid the alias.