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// { dg-do run { target c++20 } }
// Copyright (C) 2020-2024 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/>.
#include <variant>
#include <testsuite_hooks.h>
struct aggressive_aggregate
{
int a;
int b;
};
struct dumbo
{
dumbo() = delete;
};
void test_emplace()
{
std::variant<aggressive_aggregate, dumbo> x;
x.emplace<aggressive_aggregate>(1, 2);
VERIFY(x.index() == 0);
VERIFY(std::get<0>(x).a == 1);
VERIFY(std::get<0>(x).b == 2);
x.emplace<aggressive_aggregate>(1);
VERIFY(x.index() == 0);
VERIFY(std::get<0>(x).a == 1);
VERIFY(std::get<0>(x).b == 0);
x.emplace<aggressive_aggregate>();
VERIFY(x.index() == 0);
VERIFY(std::get<0>(x).a == 0);
VERIFY(std::get<0>(x).b == 0);
}
void test_in_place_type_construct()
{
using Var = std::variant<aggressive_aggregate, dumbo>;
Var x{std::in_place_type<aggressive_aggregate>, 1,2};
VERIFY(x.index() == 0);
VERIFY(std::get<0>(x).a == 1);
VERIFY(std::get<0>(x).b == 2);
Var y{std::in_place_type<aggressive_aggregate>, 1};
VERIFY(y.index() == 0);
VERIFY(std::get<0>(y).a == 1);
VERIFY(std::get<0>(y).b == 0);
Var z{std::in_place_type<aggressive_aggregate>};
VERIFY(z.index() == 0);
VERIFY(std::get<0>(z).a == 0);
VERIFY(std::get<0>(z).b == 0);
}
void test_in_place_index_construct()
{
using Var = std::variant<aggressive_aggregate, dumbo>;
Var x{std::in_place_index<0>, 1,2};
VERIFY(x.index() == 0);
VERIFY(std::get<0>(x).a == 1);
VERIFY(std::get<0>(x).b == 2);
Var y{std::in_place_index<0>, 1};
VERIFY(y.index() == 0);
VERIFY(std::get<0>(y).a == 1);
VERIFY(std::get<0>(y).b == 0);
Var z{std::in_place_index<0>};
VERIFY(z.index() == 0);
VERIFY(std::get<0>(z).a == 0);
VERIFY(std::get<0>(z).b == 0);
}
int main()
{
test_emplace();
test_in_place_type_construct();
test_in_place_index_construct();
}
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