Squashed 'third_party/boostorg/type_traits/' content from commit 059ed88
Change-Id: I222c604dfa1db194bf53bc6aa1152fb16e83ce06
git-subtree-dir: third_party/boostorg/type_traits
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+[/
+ 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_virtual_destructor has_virtual_destructor]
+ template <class T>
+ struct has_virtual_destructor : public __tof {};
+
+__inherit If T is a (possibly cv-qualified) type with a virtual destructor
+then inherits from __true_type, otherwise inherits from __false_type.
+
+__compat There is currently no
+way to portably implement this trait: the default version
+always inherits from __false_type, and has to be explicitly specialized for
+types with virtual destructors unless the compiler used has compiler __intrinsics
+that enable the trait to do the right thing:
+Currently (June 2015) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
+Intel-11.0, plus Codegear and Clang 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_VIRTUAL_DESTRUCTOR` is defined.
+
+
+__std_ref 12.4.
+
+__header ` #include <boost/type_traits/has_virtual_destructor.hpp>` or ` #include <boost/type_traits.hpp>`
+
+[endsect]
+