Tests fixes and debug vector pendantic capacity management change

[Jonathan Wakely]

On 20/12/14 17:29 +0100, François Dumont wrote:
>Hi
>
>    Following a discussion on Reflector that has been reported to me, 
>people are complaining about management of the vector capacity in the 
>pedantic debug mode. Even if it is not crystal clear in the Standard 
>there seems to be a consensus that clear shouldn't impact it. So here 
>is a simple patch to stop resetting _M_guaranteed_capacity in this 
>method.
>
>    As I run all tests in debug mode I also fix another problem. In 
>testsuite/23_containers/vector/bool/allocator/swap.cc == and != 
>propagating_allocator operators must be within __gnu_test namespace in 
>order to be considered thanks to ADL when in debug mode.

Thanks for fixing that.

>    There are also 2 tests that XPASS:
>XPASS: experimental/string_view/element_access/char/2.cc execution test
>XPASS: experimental/string_view/element_access/wchar_t/2.cc execution test
>
>    Debug assertions has been commented about because not compatible 
>with constexpr. Do we keep them this way ?

Yes, otherwise they stop being constexpr.