Template constraints for reference/value types?

[Jon Degenhardt via Digitalmars-d-learn]

On Tuesday, 6 September 2016 at 21:00:53 UTC, Lodovico Giaretta 
wrote:
> On Tuesday, 6 September 2016 at 20:46:54 UTC, Jon Degenhardt 
> wrote:
>> Is there a way to constrain template arguments to reference or 
>> value types? I'd like to do something like:
>>
>> T foo(T)(T x)
>>     if (isReferenceType!T)
>> { ... }
>>
>> --Jon
>
> You can use `if(is(T : class) || is(T : interface))`.
>
> If you also need other types, std.traits contains a bunch of 
> useful templates: isArray, isAssociativeArray, isPointer, ...

Thanks. This looks like a practical approach.