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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <optional>
// constexpr optional() noexcept;
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "archetypes.hpp"
using std::optional;
template <class Opt>
void
test_constexpr()
{
static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
static_assert(std::is_trivially_destructible<Opt>::value, "");
static_assert(std::is_trivially_destructible<typename Opt::value_type>::value, "");
constexpr Opt opt;
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_default_constructible<Opt>::value, "");
static_assert(!std::is_trivially_destructible<Opt>::value, "");
static_assert(!std::is_trivially_destructible<typename Opt::value_type>::value, "");
{
Opt opt;
assert(static_cast<bool>(opt) == false);
}
{
const Opt opt;
assert(static_cast<bool>(opt) == false);
}
struct test_constexpr_ctor
: public Opt
{
constexpr test_constexpr_ctor() {}
};
}
int main()
{
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>>();
// EXTENSIONS
#if defined(_LIBCPP_VERSION) && 0 // FIXME these extensions are currently disabled.
test_constexpr<optional<int&>>();
test_constexpr<optional<const int&>>();
test_constexpr<optional<int&>>();
test_constexpr<optional<NonLiteralTypes::NoCtors&>>();
test_constexpr<optional<NonLiteralTypes::NoCtors&&>>();
#endif
}
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