| Brian Silverman | 4a2409e | 2018-08-04 23:24:02 -0700 | [diff] [blame^] | 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_constructor has_nothrow_constructor] |
| 9 | |
| 10 | template <class T> |
| 11 | struct has_nothrow_constructor : public __tof {}; |
| 12 | |
| 13 | template <class T> |
| 14 | struct has_nothrow_default_constructor : public __tof {}; |
| 15 | |
| 16 | __inherit If T is a (possibly cv-qualified) type with a non-throwing default-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_CONSTRUCTOR) || (!defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_NOEXCEPT))` is true. |
| 27 | |
| 28 | __header ` #include <boost/type_traits/has_nothrow_constructor.hpp>` or ` #include <boost/type_traits.hpp>` |
| 29 | |
| 30 | [endsect] |
| 31 | |