How do I iterate over enum members at runtime?

[Cliff Hudson]

You could probably make a template out of the ugly __traits invocation as
well?

On Sat, Apr 9, 2011 at 3:37 PM, Andrej Mitrovic
<andrej.mitrovich at gmail.com>wrote:

> On 4/10/11, Jonathan M Davis <jmdavisProg at gmx.com> wrote:
> >> What the.. I was sure mixin wouldn't work in a foreach loop.
> >
> > Whyever not? mixins work in most places. I believe that the problem is
> that
> > they have to be a whole expression or statement rather than just a piece
> of
> > one, so sometimes you can't use a mixin for something small and have to
> put
> > more of the code in a mixin, but string mixins do work in most places.
> >
> > - Jonathan M Davis
> >
>
> Well in this case it works, but it's not always so easy. For example:
>
> import std.conv;
> enum Metrics : int
> {
>    val0,
>    val1,
>    val2
> }
>
> void foo(int m)
> {
> }
>
> void main()
> {
>    foreach (index; 0..3)
>   {
>       foo(mixin("Metrics.val" ~ to!string(index)));
>   }
> }
>
> So even though you might think "hey, it's obvious index in this case
> can never be anything other than 0, 1, or 2", you still won't be able
> to compile this. CTFE is a tricky thing.
>
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