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C++2a Utility functions to implement uses-allocator construction (P05…
…91R4) * include/std/memory (uses_allocator_construction_args): New set of overloaded functions. (make_obj_using_allocator, uninitialized_construct_using_allocator): New functions. * include/std/memory_resource (polymorphic_allocator::construct) [__cplusplus > 201703l]: Replace all overloads with a single function using uses_allocator_construction_args. * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New test. * testsuite/20_util/uses_allocator/make_obj.cc: New test. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269311 138bc75d-0d04-0410-961f-82ee72b054a4
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libstdc++-v3/testsuite/20_util/polymorphic_allocator/construct_c++2a.cc
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| // Copyright (C) 2016-2019 Free Software Foundation, Inc. | ||
| // | ||
| // This file is part of the GNU ISO C++ Library. This library is free | ||
| // software; you can redistribute it and/or modify it under the | ||
| // terms of the GNU General Public License as published by the | ||
| // Free Software Foundation; either version 3, or (at your option) | ||
| // any later version. | ||
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| // This library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
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| // You should have received a copy of the GNU General Public License along | ||
| // with this library; see the file COPYING3. If not see | ||
| // <http://www.gnu.org/licenses/>. | ||
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| // { dg-options "-std=gnu++2a" } | ||
| // { dg-do run { target c++2a } } | ||
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| #include <memory_resource> | ||
| #include <utility> | ||
| #include <tuple> | ||
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| struct do_not_copy { | ||
| do_not_copy() = default; | ||
| do_not_copy(const do_not_copy&) { throw 1; } | ||
| }; | ||
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| void | ||
| test01() | ||
| { | ||
| struct X { | ||
| X(do_not_copy&&) { } | ||
| }; | ||
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| using pair = std::pair<X, int>; | ||
| std::pmr::polymorphic_allocator<pair> a; | ||
| auto ptr = a.allocate(1); | ||
| a.construct(ptr, std::piecewise_construct, | ||
| std::tuple<do_not_copy>{}, std::make_tuple(1)); | ||
| a.deallocate(ptr, 1); | ||
| } | ||
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| void | ||
| test02() | ||
| { | ||
| struct X { | ||
| using allocator_type = std::pmr::polymorphic_allocator<int>; | ||
| X(do_not_copy&&, const allocator_type&) { } | ||
| }; | ||
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| using pair = std::pair<X, int>; | ||
| std::pmr::polymorphic_allocator<pair> a; | ||
| auto ptr = a.allocate(1); | ||
| a.construct(ptr, std::piecewise_construct, | ||
| std::tuple<do_not_copy>{}, std::make_tuple(1)); | ||
| a.deallocate(ptr, 1); | ||
| } | ||
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| void | ||
| test03() | ||
| { | ||
| struct X { | ||
| using allocator_type = std::pmr::polymorphic_allocator<int>; | ||
| X(std::allocator_arg_t, const allocator_type&, do_not_copy&&) { } | ||
| }; | ||
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| using pair = std::pair<X, int>; | ||
| std::pmr::polymorphic_allocator<pair> a; | ||
| auto ptr = a.allocate(1); | ||
| a.construct(ptr, std::piecewise_construct, | ||
| std::tuple<do_not_copy>{}, std::make_tuple(1)); | ||
| a.deallocate(ptr, 1); | ||
| } | ||
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| void | ||
| test04() | ||
| { | ||
| struct X | ||
| { | ||
| using allocator_type = std::pmr::polymorphic_allocator<int>; | ||
| X() = default; | ||
| X(const X&) { throw 1; } | ||
| X(const X&, const allocator_type&) { } | ||
| }; | ||
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| struct Y | ||
| { | ||
| using allocator_type = std::pmr::polymorphic_allocator<int>; | ||
| Y() = default; | ||
| Y(const Y&) = delete; | ||
| Y(std::allocator_arg_t, const allocator_type&, const Y&) { } | ||
| }; | ||
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| using pair_type = std::pair<X, Y>; | ||
| std::pmr::polymorphic_allocator<pair_type> a; | ||
| auto ptr = a.allocate(1); | ||
| /* not const */ pair_type p; | ||
| a.construct(ptr, p); // LWG 2975 | ||
| a.deallocate(ptr, 1); | ||
| } | ||
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| void | ||
| test05() | ||
| { | ||
| struct X { | ||
| using allocator_type = std::pmr::polymorphic_allocator<char>; | ||
| X(int); | ||
| X(int, const allocator_type&) { } | ||
| }; | ||
| std::pmr::polymorphic_allocator<X> a; | ||
| auto ptr = a.allocate(1); | ||
| a.construct(ptr, 1); | ||
| a.deallocate(ptr, 1); | ||
| } | ||
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| int main() | ||
| { | ||
| test01(); | ||
| test02(); | ||
| test03(); | ||
| test04(); | ||
| test05(); | ||
| } |
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