Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards



template <class T>
struct has_nothrow_assign : public true_type-or-false_type {};

Inherits: If T is a (possibly cv-qualified) type with a non-throwing assignment-operator then inherits from true_type, otherwise inherits from false_type. Type T must be a complete type.

Compiler Compatibility: Either requires C++11 noexcept and decltype or else some (unspecified) help from the compiler. Currently (June 2015) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear and all recent GCC versions have the necessary compiler intrinsics to ensure that this trait "just works". You may test to see if the necessary support is available by checking to see if defined(BOOST_HAS_NOTHROW_CONSTRUCTOR) || (!defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_NOEXCEPT)) is true.

Header: #include <boost/type_traits/has_nothrow_assign.hpp> or #include <boost/type_traits.hpp>