[Issue 8441] mixin containing template functions causes compiler errors

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http://d.puremagic.com/issues/show_bug.cgi?id=8441


monarchdo...@gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |monarchdo...@gmail.com


--- Comment #2 from monarchdo...@gmail.com 2013-01-18 06:07:40 PST ---
It would appear the problem lies between a combination of mixin identifier, and
template overload:

Here is a reduced test case:
//----
mixin template T() {
   void k()(){}

   void j()(){}
   void j(int i)(){}
}
class X
{
   mixin T t0;
}
void main (){ 
   X x;
   x.k!()();    //Fine
   x.j!()();    //Fine
   x.t0.k!()(); //Fine
   x.t0.j!()(); //Derp
}
//---- 
main.d(12): Error: function expected before (), not 'x.j!()'
//-----

(In reply to comment #1)
> Can also reproduced with: 
> https://github.com/eskimor/phobos/blob/new_signal/std/signals.d
> 
> And is currently a blocker for a full signals2 implementation.

I don't know how you are affected by this, but you can workaround the problem
by avoiding the template overload ambiguity. For example, this seems to work:

//----
mixin template T(string i) {

    private {
        auto j1(string s="a", U)(U u1, U u2) {
            return j!(s, U)(u1, u2);
        }
        auto j2(int i,string s="a", W)(W u1, W u2) {
            return j!(i, s, W)(u1, u2);
        }
    }

    auto j(string s="a", U)(U u1, U u2) {
        return 0;
    }
    auto j(int i,string s="a", W)(W u1, W u2) {
        return i;
    }

    mixin("
    class F" ~ i ~ " {
    auto j(string s=\"a\", U)(U u1, U u2) {
        return this.outer.t" ~ i ~ ".j1!(s,U)(u1,u2);
    }
    auto j(int i,string s=\"a\", W)(W u1, W u2) {
        return this.outer.t" ~ i ~ ".j2!(i,s,W)(u1,u2);
    }
    }
    auto f"~i~"() {
        return new F"~i~"();
    }
    ");

}

class X {
    mixin T!("1") t0;
    alias t0 t1;
}
void main (){ 
    X x = new X();
    x.f1().j!(3,"a")(2.2, 3.3);
}
//----

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