tell if __traits(allMembers, ... ) is an enum (not manifest constant)

[Nicholas Wilson via Digitalmars-d-learn]

On Thursday, 25 February 2016 at 08:40:00 UTC, nkgu wrote:
> On Thursday, 25 February 2016 at 04:55:09 UTC, Nicholas Wilson 
> wrote:
>>
>> oops should be
>> writeln(typeof(__traits(getMember, vulkan_input,  
>> m)).stringof);
>> that compiles but still prints nothing
>
> try
>
> pragma(msg, typeof(__traits(getMember, vulkan_input,  
> m)).stringof);
>
> because at compile time the code generated for writeln() is not 
> executed.
>
> Also take care with the getMember trait, it will only work if 
> the member is public.
> (or not public but located in the module where the __traits() 
> code resides).

Heh.  Thanks for the Idea anyway.
source/app.d(308): Error: module object has no type
source/app.d(308):        while evaluating pragma(msg, 
(_error_).stringof)
source/app.d(308): Error: type uint is not an expression
source/app.d(308):        while evaluating pragma(msg, 
(_error_).stringof)
pure nothrow @nogc @safe int(int major, int minor, int patch)
int
int
pure nothrow @nogc @safe uint(uint ver)
pure nothrow @nogc @safe uint(uint ver)
pure nothrow @nogc @safe uint(uint ver)
...
void
void
...
source/app.d(308): Error: type VkInstance_T is not an expression
source/app.d(308):        while evaluating pragma(msg, 
(_error_).stringof)
...

Cheating somewhat
static if(m.startsWith("Vk") && __traits(compiles, 
mixin(m~"."~m.camelToUpper_ ~ "_MAX_ENUM")))
does some of what I want but (unsurprisingly) fails to pick up 
the bitfield enums (that don't have a "_MAX_ENUM" member).