Trait to identify if a type is a struct one

[Ali Çehreli]

On 10/18/2017 10:05 AM, user1234 wrote:
> On Wednesday, 18 October 2017 at 15:16:21 UTC, drug wrote:
>> 18.10.2017 18:11, pham пишет:
>>> Is there a way to identify if a type is a struct, something like 
>>> isStruct
>>> similar to isArray.
>>>
>>> struct X
>>> {
>>> }
>>>
>>> isStruct!X == true?
>>>
>>> Also, there are isAbstractClass & isFinalClass but want to check if 
>>> type is a class regardless? something like isClass?
>>>
>>> Thanks
>>> Pham
>>>
>> if (is(X == struct))
>> {
>>    ...
>> }
> 
> static if (is(X == struct))
> {
>     ...
> }
> 
> ptherwise lots of strnage errors ;)
> 

Playing the devil's advocate, I think drug meant it as a function 
template constraint. :o)

void foo(X)(X x)
if (is(X == struct))
{
    // ...
}

Ali