[Dlang-internal] Detect CTFE in AssignExp:semantic

[Andrei Alexandrescu via Dlang-internal]

On 1/11/17 4:25 PM, Stefan Koch wrote:
> You should not need to special case ctfe inside the compiler for this.
> Rather the template should have if (__ctfe) inside it if those are needed.
> However I would advise against splitting code-paths, if it is not
> _strictly_ necessary.

That's what confuses me, it's the read of the temporary not the code 
inside the function. Would branching inside the function help with that? 
-- Andrei