Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one 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_copy : publictrue_type-or-false_type{}; template <class T> struct has_nothrow_copy_constructor : publictrue_type-or-false_type{};
Inherits: If T is a (possibly cv-qualified)
type with a non-throwing copy-constructor then inherits from true_type,
otherwise inherits from false_type.
Type T must be a complete
type.
These two traits are synonyms for each other.
Compiler Compatibility: If the compiler does not support partial-specialization of class templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler, has_nothrow_copy
will never report that a class or struct has a non-throwing copy-constructor;
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler intrinsics
to ensure that this trait "just works". You may also test to see
if the necessary intrinsics
are available by checking to see if the macro BOOST_HAS_NOTHROW_COPY
is defined.
Header: #include
<boost/type_traits/has_nothrow_copy.hpp>
or #include <boost/type_traits.hpp>