bump version to 12.2.2-pve1

[ceph.git] / ceph / src / boost / libs / type_traits / doc / has_nothrow_constructor.qbk

[/ 
  Copyright 2007 John Maddock.
  Distributed under the Boost Software License, Version 1.0.
  (See accompanying file LICENSE_1_0.txt or copy at
  http://www.boost.org/LICENSE_1_0.txt).
]

[section:has_nothrow_constructor has_nothrow_constructor]

   template <class T>
   struct has_nothrow_constructor : public __tof {};
  
   template <class T>
   struct has_nothrow_default_constructor : public __tof {};
  
__inherit If T is a (possibly cv-qualified) type with a non-throwing default-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.

__compat 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_constructor.hpp>` or ` #include <boost/type_traits.hpp>`

[endsect]