testing for deprecation

[Jonathan M Davis via Digitalmars-d-learn]

On Monday, August 28, 2017 13:08:04 jmh530 via Digitalmars-d-learn wrote:
> On Saturday, 26 August 2017 at 07:17:49 UTC, user1234 wrote:
> > getAttributes is made for UDAs only.
>
> Okay, well if you change it to
>
> deprecated {
>      void foo();
> }
>
> void main() {
>      pragma(msg, __traits(getFunctionAttributes, foo));
> }
>
> then you just get
>
> tuple(@system)
>
> so the issue still stands. I see no way to loop through members
> of a module at compile-time and exclude the ones that are
> deprecated.

I think that it's pretty clear that a new traits for __traits would be
required. Per the documentation, getFunctionAttributes does not include
anything about deprecation, and even if it did, it wouldn't be sufficient
anyway, because it would only cover functions, whereas almost any symbol
that isn't local to a function can be deprecated (the only case I can think
of at the moment where you can't deprecate a symbol that isn't inside a
function is enum members, which can't be individually deprecated, because
you can't apply any attributes to them individually). We'd probably need
something like __traits(isDeprecated, symbol).

https://issues.dlang.org/show_bug.cgi?id=17791

- Jonathan M Davis