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//===----------------------------------------------------------------------===//
//
// 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
// <optional>
// constexpr optional(nullopt_t) noexcept;
#include <optional>
#include <type_traits>
#include <cassert>
#include "archetypes.h"
#include "test_macros.h"
using std::optional;
using std::nullopt_t;
using std::nullopt;
template <class Opt>
void
test_constexpr()
{
static_assert(std::is_nothrow_constructible<Opt, nullopt_t&>::value, "");
static_assert(std::is_trivially_destructible<Opt>::value, "");
static_assert(std::is_trivially_destructible<typename Opt::value_type>::value, "");
constexpr Opt opt(nullopt);
static_assert(static_cast<bool>(opt) == false, "");
struct test_constexpr_ctor
: public Opt
{
constexpr test_constexpr_ctor() {}
};
}
template <class Opt>
void
test()
{
static_assert(std::is_nothrow_constructible<Opt, nullopt_t&>::value, "");
static_assert(!std::is_trivially_destructible<Opt>::value, "");
static_assert(!std::is_trivially_destructible<typename Opt::value_type>::value, "");
{
Opt opt(nullopt);
assert(static_cast<bool>(opt) == false);
}
{
const Opt opt(nullopt);
assert(static_cast<bool>(opt) == false);
}
struct test_constexpr_ctor
: public Opt
{
constexpr test_constexpr_ctor() {}
};
}
int main(int, char**)
{
test_constexpr<optional<int>>();
test_constexpr<optional<int*>>();
test_constexpr<optional<ImplicitTypes::NoCtors>>();
test_constexpr<optional<NonTrivialTypes::NoCtors>>();
test_constexpr<optional<NonConstexprTypes::NoCtors>>();
test<optional<NonLiteralTypes::NoCtors>>();
return 0;
}
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