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82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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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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// <optional>
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// constexpr optional() noexcept;
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#include <optional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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#include "archetypes.hpp"
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using std::optional;
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template <class Opt>
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void
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test_constexpr()
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{
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static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
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static_assert(std::is_trivially_destructible<Opt>::value, "");
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static_assert(std::is_trivially_destructible<typename Opt::value_type>::value, "");
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constexpr Opt opt;
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static_assert(static_cast<bool>(opt) == false, "");
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struct test_constexpr_ctor
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: public Opt
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{
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constexpr test_constexpr_ctor() {}
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};
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}
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template <class Opt>
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void
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test()
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{
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static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
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static_assert(!std::is_trivially_destructible<Opt>::value, "");
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static_assert(!std::is_trivially_destructible<typename Opt::value_type>::value, "");
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{
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Opt opt;
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assert(static_cast<bool>(opt) == false);
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}
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{
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const Opt opt;
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assert(static_cast<bool>(opt) == false);
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}
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struct test_constexpr_ctor
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: public Opt
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{
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constexpr test_constexpr_ctor() {}
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};
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}
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int main()
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{
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test_constexpr<optional<int>>();
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test_constexpr<optional<int*>>();
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test_constexpr<optional<ImplicitTypes::NoCtors>>();
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test_constexpr<optional<NonTrivialTypes::NoCtors>>();
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test_constexpr<optional<NonConstexprTypes::NoCtors>>();
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test<optional<NonLiteralTypes::NoCtors>>();
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// EXTENSIONS
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#if defined(_LIBCPP_VERSION) && 0 // FIXME these extensions are currently disabled.
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test_constexpr<optional<int&>>();
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test_constexpr<optional<const int&>>();
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test_constexpr<optional<int&>>();
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test_constexpr<optional<NonLiteralTypes::NoCtors&>>();
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test_constexpr<optional<NonLiteralTypes::NoCtors&&>>();
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#endif
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}
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