On Thursday, 10 March 2016 at 13:56:18 UTC, Andrea Fontana wrote:
I used to think that classes can't be used with CTFE.
Classes have worked normally with CTFE for several years now. You
don't need to do anything special with them.
Ex: http://dpaste.dzfl.pl/5879511dff02
This just doesn't do what you think it does:
if (__ctfe) pragma(msg, "compile-time");
That will ALWAYS print the thing because if(__ctfe) is a *run
time* branch, and pragma(msg) is a compile time thing. The code
gets compiled, even if __ctfe == false, so it will print anyway.
enum forceCTFE(alias expr)=expr;
That's only one way to do CTFE. Notice the error message:
variable p.forceCTFE!(willnot).forceCTFE : Unable to initialize
enum with class or pointer to struct. Use static const variable
instead.
enums don't work in references, so you do a static variable
instead. Static variables are still CTFE'd.
