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76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// <variant>
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// template <class ...Types> class variant;
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// ~variant();
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#include <cassert>
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#include <type_traits>
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#include <variant>
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#include "test_macros.h"
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struct NonTDtor {
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static int count;
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NonTDtor() = default;
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~NonTDtor() { ++count; }
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};
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int NonTDtor::count = 0;
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static_assert(!std::is_trivially_destructible<NonTDtor>::value, "");
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struct NonTDtor1 {
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static int count;
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NonTDtor1() = default;
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~NonTDtor1() { ++count; }
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};
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int NonTDtor1::count = 0;
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static_assert(!std::is_trivially_destructible<NonTDtor1>::value, "");
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struct TDtor {
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TDtor(const TDtor &) {} // non-trivial copy
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~TDtor() = default;
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};
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static_assert(!std::is_trivially_copy_constructible<TDtor>::value, "");
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static_assert(std::is_trivially_destructible<TDtor>::value, "");
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int main() {
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{
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using V = std::variant<int, long, TDtor>;
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static_assert(std::is_trivially_destructible<V>::value, "");
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}
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{
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using V = std::variant<NonTDtor, int, NonTDtor1>;
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static_assert(!std::is_trivially_destructible<V>::value, "");
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{
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V v(std::in_place_index<0>);
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assert(NonTDtor::count == 0);
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assert(NonTDtor1::count == 0);
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}
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assert(NonTDtor::count == 1);
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assert(NonTDtor1::count == 0);
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NonTDtor::count = 0;
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{ V v(std::in_place_index<1>); }
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assert(NonTDtor::count == 0);
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assert(NonTDtor1::count == 0);
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{
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V v(std::in_place_index<2>);
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assert(NonTDtor::count == 0);
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assert(NonTDtor1::count == 0);
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}
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assert(NonTDtor::count == 0);
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assert(NonTDtor1::count == 1);
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}
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}
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