| /* |
| 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/core/allocator_access.hpp> |
| |
| namespace boost { |
| |
| template<class A> |
| struct noinit_adaptor |
| : A { |
| template<class U> |
| struct rebind { |
| typedef noinit_adaptor<typename allocator_rebind<A, U>::type> other; |
| }; |
| |
| noinit_adaptor() |
| : A() { } |
| |
| #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
| template<class U> |
| noinit_adaptor(U&& u) BOOST_NOEXCEPT |
| : A(std::forward<U>(u)) { } |
| #else |
| template<class U> |
| noinit_adaptor(const U& u) BOOST_NOEXCEPT |
| : A(u) { } |
| |
| template<class U> |
| noinit_adaptor(U& u) BOOST_NOEXCEPT |
| : A(u) { } |
| #endif |
| |
| template<class U> |
| noinit_adaptor(const noinit_adaptor<U>& u) BOOST_NOEXCEPT |
| : A(static_cast<const A&>(u)) { } |
| |
| template<class U> |
| void construct(U* p) { |
| ::new((void*)p) U; |
| } |
| |
| #if defined(BOOST_NO_CXX11_ALLOCATOR) |
| template<class U, class V> |
| void construct(U* p, const 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<U>& 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<U>& 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 |