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digitalmars.D.bugs - [Issue 11873] New: function templates conflict with aliases

reply d-bugmail puremagic.com writes:
https://d.puremagic.com/issues/show_bug.cgi?id=11873

           Summary: function templates conflict with aliases
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: monarchdodra gmail.com



Apparently, this is according to spec, but I think it should be legal.

Simple functions? No problem:
//----
void foo();
void bar(int);

alias foo = bar;

void main()
{
    foo();
    foo(5);
}
//----

Templates? Problem:
//----
void foo()(); //Template here
void bar(int);

alias foo = bar;

void main()
{
    foo();
    foo(5);
}
//----
main.d(4): Error: alias main.foo conflicts with template main.foo()() at
main.d(1)
//----

I think there should not be such a conflict. There is no reason for the alias
not to work.

The above code is trivial, but a real world scenario where this can happen, is
when a module wants to publicly import a named template function overload:

A.d
//----
module a;
foo(int); //Special "int" overload 
//----

B.d
//----
module b;
foo()(); //Standard 0-arg signature;
public import A : foo; //re-use "int"
//----

Because of this,

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parent d-bugmail puremagic.com writes:
https://d.puremagic.com/issues/show_bug.cgi?id=11873






 Templates? Problem:
 //----
 void foo()(); //Template here
 void bar(int);
 
 alias foo = bar;
 
 void main()
 {
     foo();
     foo(5);
 }
 //----
 main.d(4): Error: alias main.foo conflicts with template main.foo()() at
 main.d(1)
 //----
 
 I think there should not be such a conflict. There is no reason for the alias
 not to work.


Just to be clear, I think this should be legal, as there is absolutly no
conflict between the original symbol, and the alias anyways.

Perfectly legal:
//----
void foo()();
void foo(int);

void main()
{
    foo();
    foo(5);
}
//----

If that works, why does the alias create a conflict?

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