31 Mar
2013
31 Mar
'13
5:31 p.m.
Am 31.03.2013 16:36, schrieb Dave Abrahams:
on Sat Mar 30 2013, Nathan Ridge
wrote: why did c++11 choose traits classes over metafunctions, even though the concept of a metafunction was introduced in c++11 (
). ...
P.S. Have you seen what they did with enable_if?
Do you mean that the standard version takes the condition as a boolean parameter rather than a type parameter? If so, that actually seems more natural to me.
More natural in some subjective sense but but less interoperable. Oh well.
I don't understand why they didn't get rid of the "metafunction" concept as we use it today entirely, but introduce it into the official standard via type traits. E.g. via a "constexpr" that can return types, or some other native syntax for metafunctions.