Hello,
Tuple from the typecons works fine with the basic data types. But not with the user-defined classes.
Test code:
--
import std.typecons;
class A
{
  int x;
}

unittest
{
  Tuple!(int) x; // works fine
  Tuple(A) y; /* Error: identifier 'A' is not defined
                        Error: A is used as a type
                       ~/dmd/src/phobos/std/typecons.d: variable std.typecons.Values!(A).Tuple.T voids have no value */
}
--
does it possible to use Tuple struct from typecons with the user-defined class?

Thank you

p.s. dmd-2.014

baleog Wrote:
>   Tuple(A) y; /* Error: identifier 'A' is not defined
need to read "Tuple!(A) y;"

sorry

On Wed, 02 Jul 2008 20:43:03 +0400, baleog <maccarka@yahoo.com> wrote:

> Hello,
> Tuple from the typecons works fine with the basic data types. But not with the user-defined classes.
> Test code:
> --
> import std.typecons;
> class A
> {
>   int x;
> }
>
> unittest
> {
>   Tuple!(int) x; // works fine
>   Tuple(A) y; /* Error: identifier 'A' is not defined
>                         Error: A is used as a type
>                        ~/dmd/src/phobos/std/typecons.d: variable std.typecons.Values!(A).Tuple.T voids have no value */
> }
> --
> does it possible to use Tuple struct from typecons with the user-defined class?
>
> Thank you
>
> p.s. dmd-2.014

Confirm, 2.009 and 2.015 suffer from the same problem. Don't have other versions nearby to test.

Simplified test case:

Test.d
~~~~~~
import std.typecons;

class A {
  int x;
}

Tuple!(A) y;

// end of Test.d

Output:
Error: identifier 'A' is not defined
Error: A is used as a type
C:\dmd\bin\..\src\phobos\std\typecons.d: variable std.typecons.Tuple!(A).Tuple._0 voids have no value
C:\dmd\bin\..\src\phobos\std\typecons.d(522): template instance std.typecons.Tuple!(A) error instantiating

Line numbers not mentioned, too.
Anyone fills the bug report?