Andrey Semashev 095812d84f Make the default constructor trivial if the user's type default constructor is. ...

This requires the is_trivially_default_constructible type trait, which is not
available in the older libstdc++ versions up to gcc 5.1. Thus the config macro
is updated to reflect the fact that Boost.Atomic now has more advanced needs.

Also, attempt to work around Intel compiler problem, which seems to break
(allegedly) because of the noexcept specifiers in the defaulted default
constructors. This may not be the cause, so this change will need to be tested.

Also, use value_arg_type consistently across different specializations of
basic_atomic.

2018-02-14 15:26:57 +03:00

..

boost

Make the default constructor trivial if the user's type default constructor is.

2018-02-14 15:26:57 +03:00