enum

[deadalnix]

On Thursday, 10 April 2014 at 07:19:43 UTC, Andrej Mitrovic wrote:
> On 4/8/14, Andrei Alexandrescu <SeeWebsiteForEmail at erdani.org> 
> wrote:
>> There are several questions to ask ourselves.
>
> There's another small issue with enums, you currently can't 
> easily
> create new aliases to enums where you want to define aliases 
> for both
> the enum name and the enum members.
>
> For example:
>
> -----
> void take(cairo_status_t e) { }
> cairo_status_t get() { return 
> cairo_status_t.CAIRO_STATUS_SUCCESS; }
>
> // C-style enum
> enum cairo_status_t
> {
>     CAIRO_STATUS_SUCCESS,
>     CAIRO_STATUS_NO_MEMORY,
> }
>
> // D-style enum
> enum Status
> {
>     success = cairo_status_t.CAIRO_STATUS_SUCCESS,
>     noMemory = cairo_status_t.CAIRO_STATUS_NO_MEMORY
> }
>
> void main()
> {
>     take(Status.success);    // ok, compiles
>     Status x = get();   // error
> }
> -----
>
> You could use a struct wrapper with some alias this trickery, 
> but this
> would be confusing compared to a normal enum, the documentation
> wouldn't look right, and things like EnumMembers and other enum 
> traits
> would not work on this type.

We don't need a wrapper, we simply need to stop to port header 
with what you call C style enum. It is completely useless, and 
the whole problem you mention come from the fact that the header 
was translated to that.