there is no __traits(isEnum, ...)

I've tried
foreach(m; __traits(allMembers, ...)
{
    static if (__traits(compiles,EnumMembers!(m)))
    static if (EnumMembers!(m).length)
    static if(is(m== enum))
}

I can detect static functions with __traits(isStaticFunction, ...)

On Thursday, 25 February 2016 at 04:25:25 UTC, Nicholas Wilson wrote:
> foreach(m; __traits(allMembers, ...)
> {
>     static if(is(m== enum))
> }


That's close but not quite there... try

static if(is(typeof(__traits(getMember, Item, m)) == enum))

for member variables, or if you are looking at a type itself youcan leave off the typeof() bit.

On Thursday, 25 February 2016 at 04:32:24 UTC, Adam D. Ruppe wrote:
> On Thursday, 25 February 2016 at 04:25:25 UTC, Nicholas Wilson wrote:
>> foreach(m; __traits(allMembers, ...)
>> {
>>     static if(is(m== enum))
>> }
>
>
> That's close but not quite there... try
>
> static if(is(typeof(__traits(getMember, Item, m)) == enum))
>
> for member variables, or if you are looking at a type itself youcan leave off the typeof() bit.

what is this black magic???

static if(is(typeof(__traits(getMember, vulkan_input, m)) == enum))
{
            writeln(typeof(__traits(getMember, vulkan_input, m))).stringof; //fails to compile
            writeln(m); //prints nothing
}

On Thursday, 25 February 2016 at 04:50:14 UTC, Nicholas Wilson wrote:
> On Thursday, 25 February 2016 at 04:32:24 UTC, Adam D. Ruppe wrote:
>> On Thursday, 25 February 2016 at 04:25:25 UTC, Nicholas Wilson wrote:
>>> foreach(m; __traits(allMembers, ...)
>>> {
>>>     static if(is(m== enum))
>>> }
>>
>>
>> That's close but not quite there... try
>>
>> static if(is(typeof(__traits(getMember, Item, m)) == enum))
>>
>> for member variables, or if you are looking at a type itself youcan leave off the typeof() bit.
>
> what is this black magic???
>
> static if(is(typeof(__traits(getMember, vulkan_input, m)) == enum))
> {
>             writeln(typeof(__traits(getMember, vulkan_input, m))).stringof; //fails to compile
>             writeln(m); //prints nothing
> }

oops should be
writeln(typeof(__traits(getMember, vulkan_input,  m)).stringof);
that compiles but still prints nothing

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).

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).