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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// <variant>
// template <class ...Types> class variant;
// ~variant();
#include <cassert>
#include <type_traits>
#include <variant>
#include "test_macros.h"
struct NonTDtor {
static int count;
NonTDtor() = default;
~NonTDtor() { ++count; }
};
int NonTDtor::count = 0;
static_assert(!std::is_trivially_destructible<NonTDtor>::value, "");
struct NonTDtor1 {
static int count;
NonTDtor1() = default;
~NonTDtor1() { ++count; }
};
int NonTDtor1::count = 0;
static_assert(!std::is_trivially_destructible<NonTDtor1>::value, "");
struct TDtor {
TDtor(const TDtor &) {} // non-trivial copy
~TDtor() = default;
};
static_assert(!std::is_trivially_copy_constructible<TDtor>::value, "");
static_assert(std::is_trivially_destructible<TDtor>::value, "");
int main(int, char**) {
{
using V = std::variant<int, long, TDtor>;
static_assert(std::is_trivially_destructible<V>::value, "");
}
{
using V = std::variant<NonTDtor, int, NonTDtor1>;
static_assert(!std::is_trivially_destructible<V>::value, "");
{
V v(std::in_place_index<0>);
assert(NonTDtor::count == 0);
assert(NonTDtor1::count == 0);
}
assert(NonTDtor::count == 1);
assert(NonTDtor1::count == 0);
NonTDtor::count = 0;
{ V v(std::in_place_index<1>); }
assert(NonTDtor::count == 0);
assert(NonTDtor1::count == 0);
{
V v(std::in_place_index<2>);
assert(NonTDtor::count == 0);
assert(NonTDtor1::count == 0);
}
assert(NonTDtor::count == 0);
assert(NonTDtor1::count == 1);
}
return 0;
}
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