I posted the following the the language forum thinking perhaps I was doing something wrong, but it seems that this may be a bug in the 2.014 compiler. Here is what I posted:

I am trying to create a set of methods that take a variable number of arguments (at compile time). I would have liked to have used template functions to do that, but I need the functions to be virtual, and template functions cannot be virtual. So I thought I would try to use a mixin of a variadic template function. But I am getting a weird compiler error with my simple test program. Here is the test program:

     1  import std.stdio;
     2
     3  template TCALL(ARGS...)
     4  {
     5    void makecall(ARGS args)
     6    {
     7      writefln("tcall...", args);
     8    }
     9  }
    10
    11  mixin TCALL!();
    12  mixin TCALL!(int);
    13  mixin TCALL!(int,int);
    14
    15
    16  class Method
    17  {
    18    mixin TCALL!();
    19    mixin TCALL!(int);
    20    mixin TCALL!(int,int);
    21  }
    22
    23  void main()
    24  {
    25    auto m = new Method;
    26
    27    m.makecall(0,1);
    28    makecall(0,1);
    29  }

And when I compile with "Digital Mars D Compiler v2.014" I get this error:

test6.d(27): Error: m.makecall is not a declaration
test6.d(27): Error: function expected before (), not 1 of type int

Can anyone explain what is going on here? It seems like it should work. Note that if you comment out line 27 and compile it compiles fine and runs producing the expected output:

tcall...01

-Thanks, Derek

"Derek Ney" <derek@hipgraphics.com> wrote in message news:g69vng$1lt6$1@digitalmars.com...
>I posted the following the the language forum thinking perhaps I was doing something wrong, but it seems that this may be a bug in the 2.014 compiler. Here is what I posted:
>
> I am trying to create a set of methods that take a variable number of arguments (at compile time). I would have liked to have used template functions to do that, but I need the functions to be virtual, and template functions cannot be virtual. So I thought I would try to use a mixin of a variadic template function. But I am getting a weird compiler error with my simple test program. Here is the test program:
>
>     1  import std.stdio;
>     2
>     3  template TCALL(ARGS...)
>     4  {
>     5    void makecall(ARGS args)
>     6    {
>     7      writefln("tcall...", args);
>     8    }
>     9  }
>    10
>    11  mixin TCALL!();
>    12  mixin TCALL!(int);
>    13  mixin TCALL!(int,int);
>    14
>    15
>    16  class Method
>    17  {
>    18    mixin TCALL!();
>    19    mixin TCALL!(int);
>    20    mixin TCALL!(int,int);
>    21  }
>    22
>    23  void main()
>    24  {
>    25    auto m = new Method;
>    26
>    27    m.makecall(0,1);
>    28    makecall(0,1);
>    29  }
>
> And when I compile with "Digital Mars D Compiler v2.014" I get this error:
>
> test6.d(27): Error: m.makecall is not a declaration
> test6.d(27): Error: function expected before (), not 1 of type int
>
> Can anyone explain what is going on here? It seems like it should work. Note that if you comment out line 27 and compile it compiles fine and runs producing the expected output:
>
> tcall...01
>
> -Thanks, Derek

Don't be shy about making bug reports :)  If something doesn't seem right to you -- file it!  Even if it isn't a bug, you'll at least get (or have a chance at getting) it looked at, responded to, and possibly changed.

On Thu, 24 Jul 2008 17:22:56 +0400, Derek Ney <derek@hipgraphics.com> wrote:

> I posted the following the the language forum thinking perhaps I was doing something wrong, but it seems that this may be a bug in the 2.014 compiler. Here is what I posted:
>
> I am trying to create a set of methods that take a variable number of arguments (at compile time). I would have liked to have used template functions to do that, but I need the functions to be virtual, and template functions cannot be virtual. So I thought I would try to use a mixin of a variadic template function. But I am getting a weird compiler error with my simple test program. Here is the test program:
>
>      1  import std.stdio;
>      2
>      3  template TCALL(ARGS...)
>      4  {
>      5    void makecall(ARGS args)
>      6    {
>      7      writefln("tcall...", args);
>      8    }
>      9  }
>     10
>     11  mixin TCALL!();
>     12  mixin TCALL!(int);
>     13  mixin TCALL!(int,int);
>     14
>     15
>     16  class Method
>     17  {
>     18    mixin TCALL!();
>     19    mixin TCALL!(int);
>     20    mixin TCALL!(int,int);
>     21  }
>     22
>     23  void main()
>     24  {
>     25    auto m = new Method;
>     26
>     27    m.makecall(0,1);
>     28    makecall(0,1);
>     29  }
>
> And when I compile with "Digital Mars D Compiler v2.014" I get this error:
>
> test6.d(27): Error: m.makecall is not a declaration
> test6.d(27): Error: function expected before (), not 1 of type int
>
> Can anyone explain what is going on here? It seems like it should work. Note that if you comment out line 27 and compile it compiles fine and runs producing the expected output:
>
> tcall...01
>
> -Thanks, Derek
>
>

Bugs should be posted to bugzilla: http://d.puremagic.com/issues/
This newsgroup is just mirroring posted bug reports and used for bug discussion that should not go to bugzilla for some reason.