mirror of
https://github.com/PurpleI2P/Boost-for-Android-Prebuilt
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366 lines
11 KiB
C++
366 lines
11 KiB
C++
/*
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Copyright 2007 Tobias Schwinger
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Copyright 2019 Glen Joseph Fernandes
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(glenjofe@gmail.com)
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Distributed under the Boost Software License, Version 1.0.
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(http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_FUNCTIONAL_FACTORY_HPP
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#define BOOST_FUNCTIONAL_FACTORY_HPP
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#include <boost/config.hpp>
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#include <boost/core/empty_value.hpp>
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#include <boost/core/pointer_traits.hpp>
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#include <boost/type_traits/remove_cv.hpp>
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#if !defined(BOOST_NO_CXX11_ALLOCATOR)
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#include <memory>
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#endif
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#include <new>
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
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!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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#include <utility>
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#endif
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namespace boost {
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enum factory_alloc_propagation {
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factory_alloc_for_pointee_and_deleter,
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factory_passes_alloc_to_smart_pointer
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};
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namespace detail {
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template<factory_alloc_propagation>
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struct fc_tag { };
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#if !defined(BOOST_NO_CXX11_ALLOCATOR)
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template<class A, class T>
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struct fc_rebind {
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typedef typename std::allocator_traits<A>::template rebind_alloc<T> type;
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};
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template<class A>
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struct fc_pointer {
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typedef typename std::allocator_traits<A>::pointer type;
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};
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#else
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template<class A, class T>
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struct fc_rebind {
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typedef typename A::template rebind<T>::other type;
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};
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template<class A>
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struct fc_pointer {
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typedef typename A::pointer type;
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};
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#endif
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#if !defined(BOOST_NO_CXX11_ALLOCATOR) && \
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!defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
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!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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template<class A, class T>
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inline void
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fc_destroy(A& a, T* p)
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{
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std::allocator_traits<A>::destroy(a, p);
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}
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#else
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template<class A, class T>
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inline void
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fc_destroy(A&, T* p)
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{
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p->~T();
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}
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#endif
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
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!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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#if !defined(BOOST_NO_CXX11_ALLOCATOR)
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template<class A, class T, class... Args>
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inline void
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fc_construct(A& a, T* p, Args&&... args)
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{
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std::allocator_traits<A>::construct(a, p, std::forward<Args>(args)...);
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}
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#else
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template<class A, class T, class... Args>
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inline void
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fc_construct(A&, T* p, Args&&... args)
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{
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::new((void*)p) T(std::forward<Args>(args)...);
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}
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#endif
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#endif
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template<class A>
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class fc_delete
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: boost::empty_value<A> {
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typedef boost::empty_value<A> base;
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public:
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explicit fc_delete(const A& a) BOOST_NOEXCEPT
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: base(boost::empty_init_t(), a) { }
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void operator()(typename fc_pointer<A>::type p) {
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boost::detail::fc_destroy(base::get(), boost::to_address(p));
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base::get().deallocate(p, 1);
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}
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};
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template<class R, class A>
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class fc_allocate {
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public:
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explicit fc_allocate(const A& a)
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: a_(a)
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, p_(a_.allocate(1)) { }
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~fc_allocate() {
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if (p_) {
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a_.deallocate(p_, 1);
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}
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}
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A& state() BOOST_NOEXCEPT {
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return a_;
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}
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typename A::value_type* get() const BOOST_NOEXCEPT {
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return boost::to_address(p_);
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}
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R release(fc_tag<factory_alloc_for_pointee_and_deleter>) {
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return R(release(), fc_delete<A>(a_), a_);
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}
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R release(fc_tag<factory_passes_alloc_to_smart_pointer>) {
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return R(release(), fc_delete<A>(a_));
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}
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private:
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typedef typename fc_pointer<A>::type pointer;
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pointer release() BOOST_NOEXCEPT {
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pointer p = p_;
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p_ = pointer();
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return p;
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}
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fc_allocate(const fc_allocate&);
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fc_allocate& operator=(const fc_allocate&);
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A a_;
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pointer p_;
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};
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} /* detail */
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template<class Pointer, class Allocator = void,
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factory_alloc_propagation Policy = factory_alloc_for_pointee_and_deleter>
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class factory;
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template<class Pointer, factory_alloc_propagation Policy>
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class factory<Pointer, void, Policy> {
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public:
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typedef typename remove_cv<Pointer>::type result_type;
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private:
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typedef typename pointer_traits<result_type>::element_type type;
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public:
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
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!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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template<class... Args>
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result_type operator()(Args&&... args) const {
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return result_type(new type(std::forward<Args>(args)...));
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}
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#else
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result_type operator()() const {
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return result_type(new type());
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}
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template<class A0>
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result_type operator()(A0& a0) const {
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return result_type(new type(a0));
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}
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template<class A0, class A1>
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result_type operator()(A0& a0, A1& a1) const {
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return result_type(new type(a0, a1));
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}
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template<class A0, class A1, class A2>
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result_type operator()(A0& a0, A1& a1, A2& a2) const {
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return result_type(new type(a0, a1, a2));
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}
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template<class A0, class A1, class A2, class A3>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3) const {
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return result_type(new type(a0, a1, a2, a3));
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}
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template<class A0, class A1, class A2, class A3, class A4>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4) const {
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return result_type(new type(a0, a1, a2, a3, a4));
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4,
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A5& a5) const {
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return result_type(new type(a0, a1, a2, a3, a4, a5));
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6) const {
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return result_type(new type(a0, a1, a2, a3, a4, a5, a6));
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6, A7& a7) const {
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return result_type(new type(a0, a1, a2, a3, a4, a5, a6, a7));
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6, A7& a7, A8& a8) const {
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return result_type(new type(a0, a1, a2, a3, a4, a5, a6, a7, a8));
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8, class A9>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6, A7& a7, A8& a8, A9& a9) const {
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return result_type(new type(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9));
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}
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#endif
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};
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template<class Pointer, class Allocator, factory_alloc_propagation Policy>
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class factory
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: empty_value<typename detail::fc_rebind<Allocator,
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typename pointer_traits<typename
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remove_cv<Pointer>::type>::element_type>::type> {
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public:
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typedef typename remove_cv<Pointer>::type result_type;
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private:
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typedef typename pointer_traits<result_type>::element_type type;
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typedef typename detail::fc_rebind<Allocator, type>::type allocator;
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typedef empty_value<allocator> base;
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public:
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factory() BOOST_NOEXCEPT
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: base(empty_init_t()) { }
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explicit factory(const Allocator& a) BOOST_NOEXCEPT
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: base(empty_init_t(), a) { }
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
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!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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template<class... Args>
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result_type operator()(Args&&... args) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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detail::fc_construct(s.state(), s.get(), std::forward<Args>(args)...);
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return s.release(detail::fc_tag<Policy>());
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}
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#else
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result_type operator()() const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type();
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0>
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result_type operator()(A0& a0) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1>
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result_type operator()(A0& a0, A1& a1) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2>
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result_type operator()(A0& a0, A1& a1, A2& a2) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3, class A4>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3, a4);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4,
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A5& a5) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3, a4, a5);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3, a4, a5, a6);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6, A7& a7) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3, a4, a5, a6, a7);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6, A7& a7, A8& a8) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3, a4, a5, a6, a7, a8);
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return s.release(detail::fc_tag<Policy>());
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}
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template<class A0, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8, class A9>
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result_type operator()(A0& a0, A1& a1, A2& a2, A3& a3, A4& a4, A5& a5,
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A6& a6, A7& a7, A8& a8, A9& a9) const {
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detail::fc_allocate<result_type, allocator> s(base::get());
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::new((void*)s.get()) type(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9);
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return s.release(detail::fc_tag<Policy>());
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}
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#endif
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};
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template<class Pointer, class Allocator, factory_alloc_propagation Policy>
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class factory<Pointer&, Allocator, Policy> { };
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} /* boost */
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#endif
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