Is this a bug when creating proxies in classes?

[Ali Çehreli via Digitalmars-d-learn]

On 08/25/2014 11:10 AM, Gary Willoughby wrote:
> Compiling the following code:
>
>      import std.typecons;
>
>      class Foo
>      {
>          private int foo;
>
>          mixin Proxy!(foo);
>
>          this(int x)
>          {
>              this.foo = x;
>          }
>      }
>
>      void main()
>      {
>      }
>
> Produces this error:
>
> :!rdmd --force -de -debug -w test.d
> /usr/include/dmd/phobos/std/typecons.d(4043): Error: template instance
> isArray!(typeof(a)) template 'isArray' is not defined
> test.d(7): Error: mixin test.Foo.Proxy!(foo) error instantiating
> Failed: ["dmd", "-de", "-debug", "-w", "-v", "-o-", "test.d", "-I."]
>
> Can anyone else confirm or am i doing something wrong. I'm using DMD
> 2.066.0 64bit Ubuntu 14.04.

isArray is defined in std.traits. I don't know why it doesn't work even 
though std.typecons does import it.

The workaround is to import it yourself in your program:

import std.traits;

Ali