Hi,

I wan't to process every specialization of the BitFlags struct in a function:
So far the best I can come up is this:

  static void stdUI(F)(ref F flags) if(F.stringof.startsWith("BitFlags!(")){}

But it's obviously lame.
If I try this way:

  static void stdUI(E, U)(ref BitFlags!(E, U) flags){}

I get a cannot deduce arguments error.

Same error with:
  static void stdUI(E, U, B = BitFlags!(E, U))(ref B flags){}

I'd like to know the Enum type as well.

Thank You for your help in advance!

On Sunday, 31 January 2021 at 14:04:00 UTC, realhet wrote:
> Hi,
>
> I wan't to process every specialization of the BitFlags struct in a function:
> So far the best I can come up is this:
>
>   static void stdUI(F)(ref F flags) if(F.stringof.startsWith("BitFlags!(")){}
>
> But it's obviously lame.
> If I try this way:
>
>   static void stdUI(E, U)(ref BitFlags!(E, U) flags){}
>
> I get a cannot deduce arguments error.

Your problem is that you are trying to match `U`, a template type parameter [1], with BitFlags' `unsafe`, a template value parameter [2]. It should work if you change it to:

    static void stdUI(E, Flag!"unsafe" u)(ref BitFlags!(E, u) flags) {}

[1] https://dlang.org/spec/template.html#template_type_parameters
[2] https://dlang.org/spec/template.html#template_value_parameter

On Sunday, 31 January 2021 at 14:16:15 UTC, Paul Backus wrote:
> On Sunday, 31 January 2021 at 14:04:00 UTC, realhet wrote:
>> Hi,
>>
>     static void stdUI(E, Flag!"unsafe" u)(ref BitFlags!(E, u) flags) {}

Thank You!

Somehow I forgot I could pass amd match ANY TYPE in the template parameters. I'll remember this, thanks!