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// Copyright (C) 2017-2018 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.
// 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.
// 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/>.
// { dg-options "-std=gnu++17" }
// { dg-do compile { target c++17 } }
// { dg-xfail-if "COW string missing deduction guides" { ! cxx11-abi } }
#include <string>
#include <testsuite_iterators.h>
template<typename T, typename U> struct require_same;
template<typename T> struct require_same<T, T> { using type = void; };
template<typename T, typename U>
typename require_same<T, U>::type
check_type(U&) { }
void
test01()
{
std::wstring s0;
std::allocator<wchar_t> a;
std::basic_string s1 = s0;
check_type<std::wstring>(s1);
std::basic_string s2 = std::move(s0);
check_type<std::wstring>(s2);
const std::basic_string s3 = s0;
check_type<const std::wstring>(s3);
const std::basic_string s4 = s2;
check_type<const std::wstring>(s4);
#if _GLIBCXX_USE_CXX11_ABI
std::basic_string s5(s0, a);
check_type<std::wstring>(s5);
std::basic_string s6(std::move(s0), a);
check_type<std::wstring>(s6);
#endif
std::basic_string s7(s0, 0, 0);
check_type<std::wstring>(s7);
}
void
test02()
{
using namespace __gnu_test;
wchar_t a[1] = {};
test_container<wchar_t, input_iterator_wrapper> seq(a);
std::basic_string s1(seq.begin(), seq.end());
check_type<std::wstring>(s1);
std::basic_string s2(seq.begin(), seq.end(), std::allocator<wchar_t>());
check_type<std::wstring>(s2);
std::basic_string s3((wchar_t)1, L'a');
check_type<std::wstring>(s3);
std::basic_string s4((wchar_t)1, L'a', std::allocator<wchar_t>());
check_type<std::wstring>(s4);
}
void
test05()
{
// LWG 3075 basic_string needs deduction guides from basic_string_view
std::wstring_view sv{L"A View to a Kill"};
const std::allocator<wchar_t> a;
std::basic_string s1(sv);
check_type<std::wstring>(s1);
std::basic_string s2(sv, a);
check_type<std::wstring>(s2);
std::basic_string s3(sv, 2u, 6u);
check_type<std::wstring>(s3);
std::basic_string s4(sv, 2u, 6u, a);
check_type<std::wstring>(s4);
}
void
test06()
{
// LWG 3076 basic_string CTAD ambiguity
using namespace std;
wstring s0;
basic_string s1(s0, 1, 1);
check_type<std::wstring>(s1);
basic_string s2(L"cat"sv, 1, 1);
check_type<std::wstring>(s2);
basic_string s3(L"cat", 1);
check_type<std::wstring>(s3);
}
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