Improvement in pure functions specification

[Andrei Alexandrescu via Digitalmars-d]

On 12/20/16 8:02 PM, H. S. Teoh via Digitalmars-d wrote:
> Isn't that impure by definition?!  How can tracing execution even be
> remotely considered pure?

That's why the compiler is required compulsively to call it. -- Andrei