ceph/src/boost/libs/type_traits/doc/has_nothrow_copy.qbk

   1 [/
   2   Copyright 2007 John Maddock.
   3   Distributed under the Boost Software License, Version 1.0.
   4   (See accompanying file LICENSE_1_0.txt or copy at
   5   http://www.boost.org/LICENSE_1_0.txt).
   6 ]
   7
   8 [section:has_nothrow_copy has_nothrow_copy]
   9
  10    template <class T>
  11    struct has_nothrow_copy : public __tof {};
  12
  13    template <class T>
  14    struct has_nothrow_copy_constructor : public __tof {};
  15
  16 __inherit If T is a (possibly cv-qualified) type with a non-throwing copy-constructor
  17 then inherits from __true_type, otherwise inherits from __false_type.  Type `T`
  18 must be a complete type.
  19
  20 These two traits are synonyms for each other.
  21
  22 __compat Either requires C++11 `noexcept` and `decltype` or else some (unspecified) help from the compiler.
  23 Currently (June 2015) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
  24 Intel-11.0, and Codegear and all recent GCC versions have the necessary compiler __intrinsics to ensure that this
  25 trait "just works".  You may test to see if the necessary support is available
  26 by checking to see if `defined(BOOST_HAS_NOTHROW_COPY) || (!defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_NOEXCEPT))` is true.
  27
  28 __header ` #include <boost/type_traits/has_nothrow_copy.hpp>` or ` #include <boost/type_traits.hpp>`
  29
  30 [endsect]
  31