Boost\libs\type_traits failed to build due to error C2338 on MSVC about type_traits

[jzmaddock]

The clue is in the name of the test :)

MSVC still does not implement correct enum promotions, so this is an expected failure.

[QuellaZhang]

@jzmaddock Thanks for the clarification, I have confirmed this is a compiler bug. Can you help confirm the following 2 issues?

issue1:

is_nothrow_move_constructible_test.cpp
.\boost/type_traits/is_nothrow_move_constructible.hpp(49): error C2248: 'non_copy::non_copy': cannot access private member declared in class 'non_copy'
libs\type_traits\test\is_nothrow_move_constructible_test.cpp(24): note: see declaration of 'non_copy::non_copy'
libs\type_traits\test\is_nothrow_move_constructible_test.cpp(20): note: see declaration of 'non_copy'
.\boost/type_traits/is_nothrow_move_constructible.hpp(55): note: see reference to class template instantiation 'boost::detail::false_or_cpp11_noexcept_move_constructible<T,void>' being compiled
with
[
T=non_copy
]
libs\type_traits\test\is_nothrow_move_constructible_test.cpp(256): note: see reference to class template instantiation 'boost::is_nothrow_move_constructible<non_copy>' being compiled
.\boost/type_traits/is_nothrow_move_constructible.hpp(49): error C2280: 'delete_copy::delete_copy(const delete_copy &)': attempting to reference a deleted function
libs\type_traits\test\is_nothrow_move_constructible_test.cpp(32): note: see declaration of 'delete_copy::delete_copy'
libs\type_traits\test\is_nothrow_move_constructible_test.cpp(32): note: 'delete_copy::delete_copy(const delete_copy &)': function was explicitly deleted
.\boost/type_traits/is_nothrow_move_constructible.hpp(55): note: see reference to class template instantiation 'boost::detail::false_or_cpp11_noexcept_move_constructible<T,void>' being compiled
with
[
T=delete_copy
]
libs\type_traits\test\is_nothrow_move_constructible_test.cpp(260): note: see reference to class template instantiation 'boost::is_nothrow_move_constructible<delete_copy>' being compiled

issue2:

is_nothrow_move_assignable_test.cpp
.\boost/type_traits/is_nothrow_move_assignable.hpp(52): error C2280: 'non_assignable &non_assignable::operator =(const non_assignable &)': attempting to reference a deleted function
libs\type_traits\test\is_nothrow_move_assignable_test.cpp(25): note: see declaration of 'non_assignable::operator ='
libs\type_traits\test\is_nothrow_move_assignable_test.cpp(25): note: 'non_assignable &non_assignable::operator =(const non_assignable &)': function was explicitly deleted
.\boost/type_traits/is_nothrow_move_assignable.hpp(58): note: see reference to class template instantiation 'boost::detail::false_or_cpp11_noexcept_move_assignable<T,void>' being compiled
with
[
T=non_assignable
]
libs\type_traits\test\is_nothrow_move_assignable_test.cpp(251): note: see reference to class template instantiation 'boost::is_nothrow_move_assignable<non_assignable>' being compiled