How to test for type without refs?

[anonymous via Digitalmars-d-learn]

On Tuesday, 17 March 2015 at 14:06:19 UTC, Charles Hixson wrote:
> I thought that in:
>     T* user(T)()
>     {    static assert (T.sizeof < bfHdr.user_.length);
>           static assert (__traits(isPOD, T) );
>           return    cast(T*) bfHdr.user_.ptr;
>     }
> the line:
> static assert (__traits(isPOD, T) );
>
> would test for there not being any embedded refs, pointers, 
> etc., but
> unittest
> {
> ...
>     struct    thead2    {    string    test;    }
>     auto    userTest2    =    bf.user!(thead2)();
> }
> executes without complaint.  Is there a better way?

There's std.traits.hasIndirections 
<http://dlang.org/phobos/std_traits.html#hasIndirections>.