2659663ee3
Some time ago, I introduced shortcut features like dylib-has-no-shared_mutex to encode whether the deployment target supported shared_mutex (say). This made the test suite annotations cleaner. However, the problem with building Lit features on top of other Lit features is that it's easier for them to become stale, especially when they are generated programmatically. Furthermore, it makes the bar for defining configurations from scratch higher, since more features have to be defined. Instead, I think it's better to put the XFAILs in the tests directly, which allows cleaning them up with a simple grep.
131 lines
3.1 KiB
C++
131 lines
3.1 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// Throwing bad_variant_access is supported starting in macosx10.13
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// XFAIL: with_system_cxx_lib=macosx10.12 && !no-exceptions
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// XFAIL: with_system_cxx_lib=macosx10.11 && !no-exceptions
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// XFAIL: with_system_cxx_lib=macosx10.10 && !no-exceptions
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// XFAIL: with_system_cxx_lib=macosx10.9 && !no-exceptions
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// <variant>
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// template <class ...Types> class variant;
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// constexpr variant() noexcept(see below);
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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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#include "variant_test_helpers.h"
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struct NonDefaultConstructible {
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constexpr NonDefaultConstructible(int) {}
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};
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struct NotNoexcept {
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NotNoexcept() noexcept(false) {}
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};
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#ifndef TEST_HAS_NO_EXCEPTIONS
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struct DefaultCtorThrows {
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DefaultCtorThrows() { throw 42; }
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};
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#endif
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void test_default_ctor_sfinae() {
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{
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using V = std::variant<std::monostate, int>;
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static_assert(std::is_default_constructible<V>::value, "");
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}
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{
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using V = std::variant<NonDefaultConstructible, int>;
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static_assert(!std::is_default_constructible<V>::value, "");
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}
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#if !defined(TEST_VARIANT_HAS_NO_REFERENCES)
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{
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using V = std::variant<int &, int>;
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static_assert(!std::is_default_constructible<V>::value, "");
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}
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#endif
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}
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void test_default_ctor_noexcept() {
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{
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using V = std::variant<int>;
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static_assert(std::is_nothrow_default_constructible<V>::value, "");
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}
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{
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using V = std::variant<NotNoexcept>;
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static_assert(!std::is_nothrow_default_constructible<V>::value, "");
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}
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}
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void test_default_ctor_throws() {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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using V = std::variant<DefaultCtorThrows, int>;
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try {
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V v;
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assert(false);
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} catch (const int &ex) {
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assert(ex == 42);
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} catch (...) {
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assert(false);
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}
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#endif
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}
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void test_default_ctor_basic() {
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{
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std::variant<int> v;
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assert(v.index() == 0);
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assert(std::get<0>(v) == 0);
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}
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{
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std::variant<int, long> v;
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assert(v.index() == 0);
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assert(std::get<0>(v) == 0);
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}
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{
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std::variant<int, NonDefaultConstructible> v;
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assert(v.index() == 0);
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assert(std::get<0>(v) == 0);
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}
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{
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using V = std::variant<int, long>;
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constexpr V v;
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static_assert(v.index() == 0, "");
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static_assert(std::get<0>(v) == 0, "");
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}
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{
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using V = std::variant<int, long>;
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constexpr V v;
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static_assert(v.index() == 0, "");
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static_assert(std::get<0>(v) == 0, "");
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}
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{
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using V = std::variant<int, NonDefaultConstructible>;
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constexpr V v;
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static_assert(v.index() == 0, "");
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static_assert(std::get<0>(v) == 0, "");
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}
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}
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int main(int, char**) {
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test_default_ctor_basic();
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test_default_ctor_sfinae();
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test_default_ctor_noexcept();
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test_default_ctor_throws();
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return 0;
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}
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