07.06.2015 21:40, Roland Bock:
Cool, I'll use that. It will allow users to define/use aliases in-place.
But: Lamda expressions cannot live in unevaluated code. Thus
using X = decltype(MAKE_CHAR_SEQUENCE(delta));
is illegal :-(
Yes, this limitation was discussed a bit earlier - http://boost.2283326.n4.nabble.com/Boost-announce-metaparse-Review-period-st... (and below) I think that we should have several versions of CT string macros in Boost - because unfortunately there are different trade-offs for different approaches.
Thus, while I assume that it is faster than what happens inside the MPLLIBS_STRING (haven't measured it), its use is more limited, too.
As I understand, complexity of MPLLIBS_STRING comes from fact that it can be passed immediately as template argument.
I guess so, too.
MAKE_CHAR_SEQUENCE can be used as a function argument at least :-)
I used it following proof-of-concept - https://github.com/panaseleus/ctte And it was perfectly optimized by compiler (identical ASM code with handwritten version) Best Regards, Evgeny Panasyuk