boost_mirror/core
1
0
Fork 0
mirror of https://github.com/boostorg/core.git synced 2025-05-09 23:03:54 +00:00
Code Issues Packages Projects Releases Wiki Activity

Simplify noinit_adaptor using allocator_access

Browse Source
This commit is contained in:
Glen Fernandes 2020-05-23 11:02:06 -04:00
parent 15db54983b
commit 6a33e879dd
2 changed files with 10 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
doc/noinit_adaptor.qbk
View File

@ -71,8 +71,7 @@ struct noinit_adaptor
: A {
template<class U>
struct rebind {
typedef noinit_adaptor<typename std::allocator_traits<A>::template
rebind_alloc<U> > other;
typedef noinit_adaptor<allocator_rebind_t<A, U> > other;
};
noinit_adaptor() noexcept;
@ -86,9 +85,6 @@ struct noinit_adaptor
template<class U>
void construct(U* p);
template<class U, class V, class... Args>
void construct(U* p, V&& v, Args&&... args);
template<class U>
void destroy(U* p);
};
@ -121,7 +117,7 @@ noinit_adaptor<A> noinit_adapt(const A& a) noexcept;
[[variablelist
[[Requires][`A` shall be constructible from `U`.]]
[[Effects][Initializes the `A` base class with
`static_cast<const U&>(u)`.]]]]]]
`static_cast<const A&>(u)`.]]]]]]
[endsect]
@ -131,11 +127,6 @@ noinit_adaptor<A> noinit_adapt(const A& a) noexcept;
[[`template<class U> void construct(U* p);`]
[[variablelist
[[Effects][`::new((void*)p) U`.]]]]]
[[`template<class U, class V, class... Args> void construct(U* p, V&& v,
Args&&... args);`]
[[variablelist
[[Effects][`::new(void*)p) U(std::forward<V>(v),
std::forward<Args>(args)...)`.]]]]]
[[`template<class U> void destroy(U* p);`]
[[variablelist
[[Effects][`p->~U()`.]]]]]]

41
include/boost/core/noinit_adaptor.hpp
View File

@ -8,14 +8,7 @@ Distributed under the Boost Software License, Version 1.0.
#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
#include <boost/core/allocator_access.hpp>
namespace boost {
@ -24,12 +17,7 @@ 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<U> > other;
#else
typedef noinit_adaptor<typename A::template rebind<U>::other> other;
#endif
typedef noinit_adaptor<typename allocator_rebind<A, U>::type> other;
};
noinit_adaptor()
@ -43,39 +31,26 @@ struct noinit_adaptor
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 U&>(u)) { }
: A(static_cast<const A&>(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
#if defined(BOOST_NO_CXX11_ALLOCATOR)
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>