EVOLUTION-MANAGER

Edit File: noinit_adaptor.hpp

/*
Copyright 2019 Glen Joseph Fernandes
(glenjofe@gmail.com)

Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_CORE_NOINIT_ADAPTOR_HPP
#define BOOST_CORE_NOINIT_ADAPTOR_HPP

#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_ALLOCATOR)
#include <memory>
#endif
#include <new>
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#include <utility>
#endif

namespace boost {

template<class A>
struct noinit_adaptor
 : A {
 template<class U>
 struct rebind {
#if !defined(BOOST_NO_CXX11_ALLOCATOR)
 typedef noinit_adaptor<typename std::allocator_traits<A>::template
 rebind_alloc > other;
#else
 typedef noinit_adaptor<typename A::template rebind::other> other;
#endif
 };

noinit_adaptor()
        : A() { }

#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
 template<class U>
 noinit_adaptor(U&& u) BOOST_NOEXCEPT
 : A(std::forward(u)) { }
#else
 template<class U>
 noinit_adaptor(const U& u) BOOST_NOEXCEPT
 : A(u) { }
#endif

template<class U>
 noinit_adaptor(const noinit_adaptor& u) BOOST_NOEXCEPT
 : A(static_cast<const U&>(u)) { }

template<class U>
 void construct(U* p) {
 ::new((void*)p) U;
 }

#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
 template<class U, class V, class... Args>
 void construct(U* p, V&& v, Args&&... args) {
 ::new((void*)p) U(std::forward<V>(v), std::forward<Args>(args)...);
 }
#else
 template<class U, class V>
 void construct(U* p, V&& v) {
 ::new((void*)p) U(std::forward<V>(v));
 }
#endif
#else
 template<class U, class V>
 void construct(U* p, const V& v) {
 ::new((void*)p) U(v);
 }

template<class U, class V>
 void construct(U* p, V& v) {
 ::new((void*)p) U(v);
 }
#endif

template<class U>
 void destroy(U* p) {
 p->~U();
 }
};

template<class T, class U>
inline bool
operator==(const noinit_adaptor<T>& lhs,
 const noinit_adaptor& rhs) BOOST_NOEXCEPT
{
 return static_cast<const T&>(lhs) == static_cast<const U&>(rhs);
}

template<class T, class U>
inline bool
operator!=(const noinit_adaptor<T>& lhs,
 const noinit_adaptor& rhs) BOOST_NOEXCEPT
{
 return !(lhs == rhs);
}

template<class A>
inline noinit_adaptor<A>
noinit_adapt(const A& a) BOOST_NOEXCEPT
{
 return noinit_adaptor<A>(a);
}

} /* boost */

#endif