7 Jun
2014
7 Jun
'14
5:34 a.m.
On 06/06/2014 02:53 PM, Peter Dimov wrote:
Andrey Semashev wrote:
I can reproduce it locally with clang 3.4. Shows only with -std=c++11 -stdlib=libc++. Trying to dig further.
Ah. Sneaky hobbits. Conforming extension my posterior. :-)
(Actually, it _is_ a conforming extension, by a strict reading of the standard. Still, I'd have preferred a little less cleverness.)
std::iterator_traits will be required to be SFINAE-friendly. See n3923: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3923.pdf There was a debate in the Redmond meeting about making the testing for iterator_category strict, like Howard has it in libc++. That was voted down. I think Howard is going to have to change libc++ in this regard. Eric