ldionne added a subscriber: mclow.lists.
ldionne added inline comments.

================
Comment at: include/type_traits:595
-template<class _B0, class _B1>
-struct __and_<_B0, _B1> : conditional<_B0::value, _B1, _B0>::type {};
-
----------------
It is not impossible that this was a compile-time optimization for the 
(probably very common) case where there's only 2 arguments. I'd like to have 
Marshall's input on that, since he seems to have written that code. Otherwise, 
LGTM. Ping @mclow.lists 


Repository:
  rCXX libc++

https://reviews.llvm.org/D45805



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