Structures and CTFE

[agorkvmh]

On Monday, 3 September 2018 at 13:52:24 UTC, bauss wrote:
> On Monday, 3 September 2018 at 13:39:25 UTC, agorkvmh wrote:
>> [...]
>
> It prints 1, because pragma(msg) is called when the compiler is 
> analyzing the code through the semantic process and not when 
> the body of the function is executed during CTFE.
>
> And since "pos = pos+1" is a runtime construct (technically) 
> then the expression is ignored, unless the function is called 
> during CTFE, but by the time the function is called during CTFE 
> then the pragma(msg) has already been executed.

Thank you for your quick answer.

There is a way to do print the two values at compile time?
What's the best way to debug a CTFE function?