Checking for CTFE at compile-time

[H. S. Teoh]

On Wed, Nov 07, 2018 at 10:01:15PM +0000, Per Nordlöw via Digitalmars-d-learn wrote:
> Opposite to run-time checking via
> 
> if (__ctfe)
> {
>     //
> }

It's actually not a "run-time" check, because the backend optimizer will
optimize out the true branch (check the emitted asm to confirm this).


> is there no way of checking at compile-time whether the current scope
> of a function is being executed in CTFE?

`if (__ctfe)` *is* a compile-time check.

I think you're getting confused by the blanket term "compile-time", that
actually means (at least) two different things. See:

	https://wiki.dlang.org/User:Quickfur/Compile-time_vs._compile-time


T

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