__traits(compiles, ...) with syntax errors

[Atila Neves]

On Monday, 14 January 2019 at 21:47:40 UTC, Steven Schveighoffer 
wrote:
> How many times have you written something like:

More times than I can count...

>
> void foo(T)(T t) if (__traits(compiles, t.bar())) // or 
> is(typeof(t.bar()))
> {
>    t.bar();
> }
>
> [...]

I'm not sure how best to go about this.