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Make allocator propagation more consistent for operator+(basic_string) (P1165R1)
2019-05-01 Nina Dinka Ranns <dinka.ranns@gmail.com> Make allocator propagation more consistent for operator+(basic_string) (P1165R1) * include/bits/basic_string.h (operator+(basic_string&&, basic_string&&): Changed resulting allocator to always be the one from the first parameter. * include/bits/basic_string.tcc (operator+(const _CharT*, const basic_string&)): Changed resulting allocator to be SOCCC on the second parameter's allocator. (operator+(_CharT, const basic_string&)): Likewise. * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc: New. * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc: New. From-SVN: r270953
This commit is contained in:
Nina Dinka Ranns
Jonathan Wakely
parent
2313938e75
commit
f4e678ef74
@ -1,3 +1,19 @@
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2019-05-01 Nina Dinka Ranns <dinka.ranns@gmail.com>
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Make allocator propagation more consistent for
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operator+(basic_string) (P1165R1)
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* include/bits/basic_string.h
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(operator+(basic_string&&, basic_string&&): Changed resulting
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allocator to always be the one from the first parameter.
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* include/bits/basic_string.tcc
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(operator+(const _CharT*, const basic_string&)): Changed
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resulting allocator to be SOCCC on the second parameter's allocator.
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(operator+(_CharT, const basic_string&)): Likewise.
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* testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
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New.
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* testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
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New.
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2019-05-07 Jonathan Wakely <jwakely@redhat.com>
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* include/bits/regex.h: Improve docs.
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@ -6096,11 +6096,21 @@ _GLIBCXX_END_NAMESPACE_CXX11
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operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
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basic_string<_CharT, _Traits, _Alloc>&& __rhs)
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{
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const auto __size = __lhs.size() + __rhs.size();
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const bool __cond = (__size > __lhs.capacity()
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&& __size <= __rhs.capacity());
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return __cond ? std::move(__rhs.insert(0, __lhs))
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: std::move(__lhs.append(__rhs));
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#if _GLIBCXX_USE_CXX11_ABI
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using _Alloc_traits = allocator_traits<_Alloc>;
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bool __use_rhs = false;
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if _GLIBCXX17_CONSTEXPR (typename _Alloc_traits::is_always_equal{})
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__use_rhs = true;
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else if (__lhs.get_allocator() == __rhs.get_allocator())
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__use_rhs = true;
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if (__use_rhs)
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#endif
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{
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const auto __size = __lhs.size() + __rhs.size();
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if (__size > __lhs.capacity() && __size <= __rhs.capacity())
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return std::move(__rhs.insert(0, __lhs));
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}
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return std::move(__lhs.append(__rhs));
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}
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template<typename _CharT, typename _Traits, typename _Alloc>
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@ -1161,8 +1161,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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__glibcxx_requires_string(__lhs);
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typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
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typedef typename __string_type::size_type __size_type;
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typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
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rebind<_CharT>::other _Char_alloc_type;
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typedef __gnu_cxx::__alloc_traits<_Char_alloc_type> _Alloc_traits;
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const __size_type __len = _Traits::length(__lhs);
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__string_type __str;
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__string_type __str(_Alloc_traits::_S_select_on_copy(
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__rhs.get_allocator()));
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__str.reserve(__len + __rhs.size());
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__str.append(__lhs, __len);
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__str.append(__rhs);
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@ -1175,7 +1179,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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{
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typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
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typedef typename __string_type::size_type __size_type;
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__string_type __str;
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typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
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rebind<_CharT>::other _Char_alloc_type;
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typedef __gnu_cxx::__alloc_traits<_Char_alloc_type> _Alloc_traits;
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__string_type __str(_Alloc_traits::_S_select_on_copy(
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__rhs.get_allocator()));
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const __size_type __len = __rhs.size();
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__str.reserve(__len + 1);
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__str.append(__size_type(1), __lhs);
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@ -0,0 +1,151 @@
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// 2019-04-30 Nina Dinka Ranns <dinka.ranns@gmail.com>
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// Copyright (C) 2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do run { target c++11 } }
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// COW strings don't support C++11 allocators:
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// { dg-require-effective-target cxx11-abi }
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#include <string>
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#include <testsuite_hooks.h>
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#include <testsuite_allocator.h>
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#include <ext/throw_allocator.h>
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using C = char;
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using traits = std::char_traits<C>;
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using __gnu_test::propagating_allocator;
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void test01()
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{
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typedef propagating_allocator<C, true> alloc_type;
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typedef std::basic_string<C, traits, alloc_type> test_type;
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test_type v1("something",alloc_type(1));
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test_type v2("something",alloc_type(2));
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auto r1 = v1 + v2;
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VERIFY(r1.get_allocator().get_personality() == 1);
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auto r2 = v1 + std::move(v2);
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VERIFY(r2.get_allocator().get_personality() == 2);
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test_type v3("something", alloc_type(3));
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test_type v4("something", alloc_type(4));
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auto r3 = std::move(v3) + v4;
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VERIFY(r3.get_allocator().get_personality() == 3);
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auto r4 = std::move(v1) +std::move(v4);
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VERIFY(r4.get_allocator().get_personality() == 1);
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test_type v5("something", alloc_type(5));
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auto r5 = v5 + "str";
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VERIFY(r5.get_allocator().get_personality() == 5);
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auto r6 = v5 + 'c';
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VERIFY(r6.get_allocator().get_personality() == 5);
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auto r7 = std::move(v5) + "str";
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VERIFY(r7.get_allocator().get_personality() == 5);
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test_type v6("something", alloc_type(6));
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auto r8 = std::move(v6) + 'c';
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VERIFY(r8.get_allocator().get_personality() == 6);
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test_type v7("something", alloc_type(7));
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auto r9 = "str" + v7;
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VERIFY(r9.get_allocator().get_personality() == 7);
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auto r10 = 'c' + v7;
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VERIFY(r10.get_allocator().get_personality() == 7);
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auto r11 = "str" + std::move(v7);
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VERIFY(r11.get_allocator().get_personality() == 7);
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test_type v8("something", alloc_type(8));
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auto r12 = 'c' + std::move(v8);
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VERIFY(r12.get_allocator().get_personality() == 8);
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}
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void test02()
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{
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typedef propagating_allocator<C, false> alloc_type;
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typedef std::basic_string<C, traits, alloc_type> test_type;
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test_type v1("something",alloc_type(1));
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test_type v2("something",alloc_type(2));
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auto r1 = v1 + v2;
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VERIFY(r1.get_allocator().get_personality() != 1);
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auto r2 = v1 + std::move(v2);
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VERIFY(r2.get_allocator().get_personality() == 2);
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test_type v3("something", alloc_type(3));
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test_type v4("something", alloc_type(4));
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auto r3 = std::move(v3) + v4;
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VERIFY(r3.get_allocator().get_personality() == 3);
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auto r4 = std::move(v1) +std::move(v4);
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VERIFY(r4.get_allocator().get_personality() == 1);
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test_type v5("something", alloc_type(5));
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auto r5 = v5 + "str";
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VERIFY(r5.get_allocator().get_personality() != 5);
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auto r6 = v5 + 'c';
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VERIFY(r6.get_allocator().get_personality() != 5);
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auto r7 = std::move(v5) + "str";
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VERIFY(r7.get_allocator().get_personality() == 5);
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test_type v6("something", alloc_type(6));
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auto r8 = std::move(v6) + 'c';
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VERIFY(r8.get_allocator().get_personality() == 6);
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test_type v7("something", alloc_type(7));
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auto r9 = "str" + v7;
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VERIFY(r9.get_allocator().get_personality() != 7);
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auto r10 = 'c' + v7;
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VERIFY(r10.get_allocator().get_personality() != 7);
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auto r11 = "str" + std::move(v7);
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VERIFY(r11.get_allocator().get_personality() == 7);
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test_type v8("something", alloc_type(8));
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auto r12 = 'c' + std::move(v8);
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VERIFY(r12.get_allocator().get_personality() == 8);
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}
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void test03()
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{
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typedef propagating_allocator<C, false> alloc_type;
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typedef std::basic_string<C, traits, alloc_type> test_type;
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test_type v1("s",alloc_type(1));
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v1.resize(10);
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v1.shrink_to_fit();
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test_type v2(10000,'x',alloc_type(2));
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v2.reserve(10010);
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auto r=std::move(v1)+std::move(v2);
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VERIFY(r.get_allocator().get_personality() == 1);
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}
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int main()
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{
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test01();
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test02();
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test03();
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return 0;
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}
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@ -0,0 +1,152 @@
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// 2019-04-30 Nina Dinka Ranns <dinka.ranns@gmail.com>
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// Copyright (C) 2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do run { target c++11 } }
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// COW strings don't support C++11 allocators:
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// { dg-require-effective-target cxx11-abi }
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#include <string>
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#include <testsuite_hooks.h>
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#include <testsuite_allocator.h>
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#include <ext/throw_allocator.h>
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using C = wchar_t;
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using traits = std::char_traits<C>;
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using __gnu_test::propagating_allocator;
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void test01()
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{
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typedef propagating_allocator<C, true> alloc_type;
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typedef std::basic_string<C, traits, alloc_type> test_type;
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test_type v1(L"something",alloc_type(1));
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test_type v2(L"something",alloc_type(2));
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auto r1 = v1 + v2;
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VERIFY(r1.get_allocator().get_personality() == 1);
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auto r2 = v1 + std::move(v2);
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VERIFY(r2.get_allocator().get_personality() == 2);
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test_type v3(L"something", alloc_type(3));
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test_type v4(L"something", alloc_type(4));
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auto r3 = std::move(v3) + v4;
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VERIFY(r3.get_allocator().get_personality() == 3);
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auto r4 = std::move(v1) +std::move(v4);
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VERIFY(r4.get_allocator().get_personality() == 1);
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test_type v5(L"something", alloc_type(5));
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auto r5 = v5 + L"str";
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VERIFY(r5.get_allocator().get_personality() == 5);
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auto r6 = v5 + L'c';
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VERIFY(r6.get_allocator().get_personality() == 5);
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auto r7 = std::move(v5) + L"str";
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VERIFY(r7.get_allocator().get_personality() == 5);
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test_type v6(L"something", alloc_type(6));
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auto r8 = std::move(v6) + L'c';
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VERIFY(r8.get_allocator().get_personality() == 6);
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test_type v7(L"something", alloc_type(7));
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auto r9 = L"str" + v7;
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VERIFY(r9.get_allocator().get_personality() == 7);
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auto r10 = L'c' + v7;
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VERIFY(r10.get_allocator().get_personality() == 7);
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auto r11 = L"str" + std::move(v7);
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VERIFY(r11.get_allocator().get_personality() == 7);
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test_type v8(L"something", alloc_type(8));
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auto r12 = L'c' + std::move(v8);
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VERIFY(r12.get_allocator().get_personality() == 8);
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}
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void test02()
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{
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typedef propagating_allocator<C, false> alloc_type;
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typedef std::basic_string<C, traits, alloc_type> test_type;
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test_type v1(L"something",alloc_type(1));
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test_type v2(L"something",alloc_type(2));
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auto r1 = v1 + v2;
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VERIFY(r1.get_allocator().get_personality() != 1);
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auto r2 = v1 + std::move(v2);
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VERIFY(r2.get_allocator().get_personality() == 2);
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test_type v3(L"something", alloc_type(3));
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test_type v4(L"something", alloc_type(4));
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auto r3 = std::move(v3) + v4;
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VERIFY(r3.get_allocator().get_personality() == 3);
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auto r4 = std::move(v1) +std::move(v4);
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VERIFY(r4.get_allocator().get_personality() == 1);
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test_type v5(L"something", alloc_type(5));
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auto r5 = v5 + L"str";
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VERIFY(r5.get_allocator().get_personality() != 5);
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auto r6 = v5 + L'c';
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VERIFY(r6.get_allocator().get_personality() != 5);
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auto r7 = std::move(v5) + L"str";
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VERIFY(r7.get_allocator().get_personality() == 5);
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test_type v6(L"something", alloc_type(6));
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auto r8 = std::move(v6) + L'c';
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VERIFY(r8.get_allocator().get_personality() == 6);
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test_type v7(L"something", alloc_type(7));
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auto r9 = L"str" + v7;
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VERIFY(r9.get_allocator().get_personality() != 7);
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auto r10 = L'c' + v7;
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VERIFY(r10.get_allocator().get_personality() != 7);
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auto r11 = L"str" + std::move(v7);
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VERIFY(r11.get_allocator().get_personality() == 7);
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test_type v8(L"something", alloc_type(8));
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auto r12 = L'c' + std::move(v8);
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VERIFY(r12.get_allocator().get_personality() == 8);
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}
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void test03()
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{
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typedef propagating_allocator<C, false> alloc_type;
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typedef std::basic_string<C, traits, alloc_type> test_type;
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test_type v1(L"s",alloc_type(1));
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v1.resize(10);
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v1.shrink_to_fit();
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test_type v2(10000,L'x',alloc_type(2));
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v2.reserve(10010);
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auto r=std::move(v1)+std::move(v2);
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VERIFY(r.get_allocator().get_personality() == 1);
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}
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int main()
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{
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test01();
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test02();
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test03();
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return 0;
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}
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