On Saturday, January 07, 2012 00:03:39 Alex Rønne Petersen wrote: > Most likely those functions are just implemented using inline assembly, > therefore not usable in CTFE.
Yeah, several functions in std.math use inline assembly. So, for them to be able to be used at compile time, either the compiler must be expanded to be able to run asm statements at compile time (which may or may not be planned and may or may not be reasonable), or those functions need another branch (using __cfte in an if condition) which doesn't use assembly. Or I suppose that if the extra check for __ctfe isn't considered particularly acceptable (after all, they're already using assembly), then separate functions meant specifically for CTFE would be necessary. I don't know what Don's preferred approach would be, but presumably, it would be up to him since he's the primary maintainer of both CTFE and std.math. An enhancement request for it should probably be opened: d.puremagi.com/issues - Jonathan M Davis
