[test] Test changes to accommodate LWG 2904 "Make variant move-assignment more exception safe"
Also: Move constexpr / triviality extension tests into the std tree and make them conditional on _LIBCPP_VERSION / _MSVC_STL_VERSION. https://reviews.llvm.org/D32671 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@304847 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Casey Carter
@@ -1,209 +0,0 @@
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// -*- 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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// The following compilers don't generate constexpr special members correctly.
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// XFAIL: clang-3.5, clang-3.6, clang-3.7, clang-3.8
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// XFAIL: apple-clang-6, apple-clang-7, apple-clang-8.0
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// <variant>
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// template <class ...Types> class variant;
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// variant& operator=(variant const&);
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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 NTCopyAssign {
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constexpr NTCopyAssign(int v) : value(v) {}
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NTCopyAssign(const NTCopyAssign &) = default;
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NTCopyAssign(NTCopyAssign &&) = default;
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NTCopyAssign &operator=(const NTCopyAssign &that) {
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value = that.value;
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return *this;
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};
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NTCopyAssign &operator=(NTCopyAssign &&) = delete;
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int value;
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};
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static_assert(!std::is_trivially_copy_assignable<NTCopyAssign>::value, "");
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static_assert(std::is_copy_assignable<NTCopyAssign>::value, "");
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struct TCopyAssign {
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constexpr TCopyAssign(int v) : value(v) {}
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TCopyAssign(const TCopyAssign &) = default;
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TCopyAssign(TCopyAssign &&) = default;
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TCopyAssign &operator=(const TCopyAssign &) = default;
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TCopyAssign &operator=(TCopyAssign &&) = delete;
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int value;
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};
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static_assert(std::is_trivially_copy_assignable<TCopyAssign>::value, "");
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struct TCopyAssignNTMoveAssign {
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constexpr TCopyAssignNTMoveAssign(int v) : value(v) {}
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TCopyAssignNTMoveAssign(const TCopyAssignNTMoveAssign &) = default;
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TCopyAssignNTMoveAssign(TCopyAssignNTMoveAssign &&) = default;
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TCopyAssignNTMoveAssign &operator=(const TCopyAssignNTMoveAssign &) = default;
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TCopyAssignNTMoveAssign &operator=(TCopyAssignNTMoveAssign &&that) {
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value = that.value;
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that.value = -1;
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return *this;
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}
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int value;
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};
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static_assert(std::is_trivially_copy_assignable_v<TCopyAssignNTMoveAssign>, "");
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void test_copy_assignment_sfinae() {
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{
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using V = std::variant<int, long>;
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static_assert(std::is_trivially_copy_assignable<V>::value, "");
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}
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{
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using V = std::variant<int, NTCopyAssign>;
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static_assert(!std::is_trivially_copy_assignable<V>::value, "");
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static_assert(std::is_copy_assignable<V>::value, "");
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}
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{
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using V = std::variant<int, TCopyAssign>;
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static_assert(std::is_trivially_copy_assignable<V>::value, "");
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}
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{
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using V = std::variant<int, TCopyAssignNTMoveAssign>;
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static_assert(std::is_trivially_copy_assignable<V>::value, "");
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}
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}
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template <typename T> struct Result { size_t index; T value; };
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void test_copy_assignment_same_index() {
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{
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struct {
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constexpr Result<int> operator()() const {
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using V = std::variant<int>;
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V v(43);
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V v2(42);
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v = v2;
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return {v.index(), std::get<0>(v)};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 0, "");
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static_assert(result.value == 42, "");
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}
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{
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struct {
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constexpr Result<long> operator()() const {
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using V = std::variant<int, long, unsigned>;
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V v(43l);
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V v2(42l);
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v = v2;
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return {v.index(), std::get<1>(v)};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42l, "");
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}
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{
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struct {
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constexpr Result<int> operator()() const {
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using V = std::variant<int, TCopyAssign, unsigned>;
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V v(std::in_place_type<TCopyAssign>, 43);
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V v2(std::in_place_type<TCopyAssign>, 42);
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v = v2;
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return {v.index(), std::get<1>(v).value};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42, "");
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}
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{
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struct {
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constexpr Result<int> operator()() const {
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using V = std::variant<int, TCopyAssignNTMoveAssign, unsigned>;
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V v(std::in_place_type<TCopyAssignNTMoveAssign>, 43);
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V v2(std::in_place_type<TCopyAssignNTMoveAssign>, 42);
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v = v2;
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return {v.index(), std::get<1>(v).value};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42, "");
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}
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}
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void test_copy_assignment_different_index() {
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{
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struct {
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constexpr Result<long> operator()() const {
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using V = std::variant<int, long, unsigned>;
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V v(43);
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V v2(42l);
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v = v2;
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return {v.index(), std::get<1>(v)};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42l, "");
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}
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{
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struct {
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constexpr Result<int> operator()() const {
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using V = std::variant<int, TCopyAssign, unsigned>;
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V v(std::in_place_type<unsigned>, 43);
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V v2(std::in_place_type<TCopyAssign>, 42);
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v = v2;
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return {v.index(), std::get<1>(v).value};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42, "");
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}
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}
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template <size_t NewIdx, class ValueType>
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constexpr bool test_constexpr_assign_extension_imp(
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std::variant<long, void*, int>&& v, ValueType&& new_value)
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{
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const std::variant<long, void*, int> cp(
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std::forward<ValueType>(new_value));
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v = cp;
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return v.index() == NewIdx &&
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std::get<NewIdx>(v) == std::get<NewIdx>(cp);
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}
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void test_constexpr_copy_assignment_extension() {
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#ifdef _LIBCPP_VERSION
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using V = std::variant<long, void*, int>;
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static_assert(std::is_trivially_copyable<V>::value, "");
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static_assert(std::is_trivially_copy_assignable<V>::value, "");
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static_assert(test_constexpr_assign_extension_imp<0>(V(42l), 101l), "");
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static_assert(test_constexpr_assign_extension_imp<0>(V(nullptr), 101l), "");
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static_assert(test_constexpr_assign_extension_imp<1>(V(42l), nullptr), "");
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static_assert(test_constexpr_assign_extension_imp<2>(V(42l), 101), "");
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#endif
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}
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int main() {
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test_copy_assignment_same_index();
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test_copy_assignment_different_index();
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test_copy_assignment_sfinae();
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test_constexpr_copy_assignment_extension();
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}
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@@ -1,197 +0,0 @@
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// -*- 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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// The following compilers don't generate constexpr special members correctly.
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// XFAIL: clang-3.5, clang-3.6, clang-3.7, clang-3.8
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// XFAIL: apple-clang-6, apple-clang-7, apple-clang-8.0
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// <variant>
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// template <class ...Types> class variant;
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// variant& operator=(variant&&) noexcept(see below);
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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 NTMoveAssign {
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constexpr NTMoveAssign(int v) : value(v) {}
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NTMoveAssign(const NTMoveAssign &) = default;
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NTMoveAssign(NTMoveAssign &&) = default;
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NTMoveAssign &operator=(const NTMoveAssign &that) = default;
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NTMoveAssign &operator=(NTMoveAssign &&that) {
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value = that.value;
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that.value = -1;
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return *this;
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};
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int value;
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};
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static_assert(!std::is_trivially_move_assignable<NTMoveAssign>::value, "");
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static_assert(std::is_move_assignable<NTMoveAssign>::value, "");
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struct TMoveAssign {
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constexpr TMoveAssign(int v) : value(v) {}
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TMoveAssign(const TMoveAssign &) = delete;
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TMoveAssign(TMoveAssign &&) = default;
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TMoveAssign &operator=(const TMoveAssign &) = delete;
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TMoveAssign &operator=(TMoveAssign &&) = default;
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int value;
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};
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static_assert(std::is_trivially_move_assignable<TMoveAssign>::value, "");
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struct TMoveAssignNTCopyAssign {
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constexpr TMoveAssignNTCopyAssign(int v) : value(v) {}
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TMoveAssignNTCopyAssign(const TMoveAssignNTCopyAssign &) = default;
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TMoveAssignNTCopyAssign(TMoveAssignNTCopyAssign &&) = default;
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TMoveAssignNTCopyAssign &operator=(const TMoveAssignNTCopyAssign &that) {
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value = that.value;
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return *this;
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}
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TMoveAssignNTCopyAssign &operator=(TMoveAssignNTCopyAssign &&) = default;
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int value;
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};
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static_assert(std::is_trivially_move_assignable_v<TMoveAssignNTCopyAssign>, "");
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void test_move_assignment_sfinae() {
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{
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using V = std::variant<int, long>;
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static_assert(std::is_trivially_move_assignable<V>::value, "");
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}
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{
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using V = std::variant<int, NTMoveAssign>;
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static_assert(!std::is_trivially_move_assignable<V>::value, "");
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static_assert(std::is_move_assignable<V>::value, "");
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}
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{
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using V = std::variant<int, TMoveAssign>;
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static_assert(std::is_trivially_move_assignable<V>::value, "");
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}
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{
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using V = std::variant<int, TMoveAssignNTCopyAssign>;
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static_assert(std::is_trivially_move_assignable<V>::value, "");
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}
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}
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template <typename T> struct Result { size_t index; T value; };
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void test_move_assignment_same_index() {
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{
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struct {
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constexpr Result<int> operator()() const {
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using V = std::variant<int>;
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V v(43);
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V v2(42);
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v = std::move(v2);
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return {v.index(), std::get<0>(v)};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 0, "");
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static_assert(result.value == 42, "");
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}
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{
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struct {
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constexpr Result<long> operator()() const {
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using V = std::variant<int, long, unsigned>;
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V v(43l);
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V v2(42l);
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v = std::move(v2);
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return {v.index(), std::get<1>(v)};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42l, "");
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}
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{
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struct {
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constexpr Result<int> operator()() const {
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using V = std::variant<int, TMoveAssign, unsigned>;
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V v(std::in_place_type<TMoveAssign>, 43);
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V v2(std::in_place_type<TMoveAssign>, 42);
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v = std::move(v2);
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return {v.index(), std::get<1>(v).value};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42, "");
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}
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}
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void test_move_assignment_different_index() {
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{
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struct {
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constexpr Result<long> operator()() const {
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using V = std::variant<int, long, unsigned>;
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V v(43);
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V v2(42l);
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v = std::move(v2);
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return {v.index(), std::get<1>(v)};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42l, "");
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}
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{
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struct {
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constexpr Result<long> operator()() const {
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using V = std::variant<int, TMoveAssign, unsigned>;
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V v(std::in_place_type<unsigned>, 43);
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V v2(std::in_place_type<TMoveAssign>, 42);
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v = std::move(v2);
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return {v.index(), std::get<1>(v).value};
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}
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} test;
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constexpr auto result = test();
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static_assert(result.index == 1, "");
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static_assert(result.value == 42, "");
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}
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}
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template <size_t NewIdx, class ValueType>
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constexpr bool test_constexpr_assign_extension_imp(
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std::variant<long, void*, int>&& v, ValueType&& new_value)
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{
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std::variant<long, void*, int> v2(
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std::forward<ValueType>(new_value));
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const auto cp = v2;
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v = std::move(v2);
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return v.index() == NewIdx &&
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std::get<NewIdx>(v) == std::get<NewIdx>(cp);
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}
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void test_constexpr_move_assignment_extension() {
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#ifdef _LIBCPP_VERSION
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using V = std::variant<long, void*, int>;
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static_assert(std::is_trivially_copyable<V>::value, "");
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static_assert(std::is_trivially_move_assignable<V>::value, "");
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static_assert(test_constexpr_assign_extension_imp<0>(V(42l), 101l), "");
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static_assert(test_constexpr_assign_extension_imp<0>(V(nullptr), 101l), "");
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static_assert(test_constexpr_assign_extension_imp<1>(V(42l), nullptr), "");
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static_assert(test_constexpr_assign_extension_imp<2>(V(42l), 101), "");
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#endif
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}
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int main() {
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test_move_assignment_same_index();
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test_move_assignment_different_index();
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test_move_assignment_sfinae();
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test_constexpr_move_assignment_extension();
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}
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@@ -1,120 +0,0 @@
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// -*- C++ -*-
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//===----------------------------------------------------------------------===//
|
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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
|
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|
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// <variant>
|
||||
|
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// template <class ...Types> class variant;
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||||
|
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// variant(variant const&);
|
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|
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#include <type_traits>
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#include <variant>
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|
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#include "test_macros.h"
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|
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struct NTCopy {
|
||||
constexpr NTCopy(int v) : value(v) {}
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NTCopy(const NTCopy &that) : value(that.value) {}
|
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NTCopy(NTCopy &&) = delete;
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||||
int value;
|
||||
};
|
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|
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static_assert(!std::is_trivially_copy_constructible<NTCopy>::value, "");
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static_assert(std::is_copy_constructible<NTCopy>::value, "");
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|
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struct TCopy {
|
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constexpr TCopy(int v) : value(v) {}
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TCopy(TCopy const &) = default;
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TCopy(TCopy &&) = delete;
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||||
int value;
|
||||
};
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||||
|
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static_assert(std::is_trivially_copy_constructible<TCopy>::value, "");
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|
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struct TCopyNTMove {
|
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constexpr TCopyNTMove(int v) : value(v) {}
|
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TCopyNTMove(const TCopyNTMove&) = default;
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TCopyNTMove(TCopyNTMove&& that) : value(that.value) { that.value = -1; }
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int value;
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||||
};
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static_assert(std::is_trivially_copy_constructible<TCopyNTMove>::value, "");
|
||||
|
||||
void test_copy_ctor_sfinae() {
|
||||
{
|
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using V = std::variant<int, long>;
|
||||
static_assert(std::is_trivially_copy_constructible<V>::value, "");
|
||||
}
|
||||
{
|
||||
using V = std::variant<int, NTCopy>;
|
||||
static_assert(!std::is_trivially_copy_constructible<V>::value, "");
|
||||
static_assert(std::is_copy_constructible<V>::value, "");
|
||||
}
|
||||
{
|
||||
using V = std::variant<int, TCopy>;
|
||||
static_assert(std::is_trivially_copy_constructible<V>::value, "");
|
||||
}
|
||||
{
|
||||
using V = std::variant<int, TCopyNTMove>;
|
||||
static_assert(std::is_trivially_copy_constructible<V>::value, "");
|
||||
}
|
||||
}
|
||||
|
||||
void test_copy_ctor_basic() {
|
||||
{
|
||||
constexpr std::variant<int> v(std::in_place_index<0>, 42);
|
||||
static_assert(v.index() == 0, "");
|
||||
constexpr std::variant<int> v2 = v;
|
||||
static_assert(v2.index() == 0, "");
|
||||
static_assert(std::get<0>(v2) == 42, "");
|
||||
}
|
||||
{
|
||||
constexpr std::variant<int, long> v(std::in_place_index<1>, 42);
|
||||
static_assert(v.index() == 1, "");
|
||||
constexpr std::variant<int, long> v2 = v;
|
||||
static_assert(v2.index() == 1, "");
|
||||
static_assert(std::get<1>(v2) == 42, "");
|
||||
}
|
||||
{
|
||||
constexpr std::variant<TCopy> v(std::in_place_index<0>, 42);
|
||||
static_assert(v.index() == 0, "");
|
||||
constexpr std::variant<TCopy> v2(v);
|
||||
static_assert(v2.index() == 0, "");
|
||||
static_assert(std::get<0>(v2).value == 42, "");
|
||||
}
|
||||
{
|
||||
constexpr std::variant<int, TCopy> v(std::in_place_index<1>, 42);
|
||||
static_assert(v.index() == 1, "");
|
||||
constexpr std::variant<int, TCopy> v2(v);
|
||||
static_assert(v2.index() == 1, "");
|
||||
static_assert(std::get<1>(v2).value == 42, "");
|
||||
}
|
||||
{
|
||||
constexpr std::variant<TCopyNTMove> v(std::in_place_index<0>, 42);
|
||||
static_assert(v.index() == 0, "");
|
||||
constexpr std::variant<TCopyNTMove> v2(v);
|
||||
static_assert(v2.index() == 0, "");
|
||||
static_assert(std::get<0>(v2).value == 42, "");
|
||||
}
|
||||
{
|
||||
constexpr std::variant<int, TCopyNTMove> v(std::in_place_index<1>, 42);
|
||||
static_assert(v.index() == 1, "");
|
||||
constexpr std::variant<int, TCopyNTMove> v2(v);
|
||||
static_assert(v2.index() == 1, "");
|
||||
static_assert(std::get<1>(v2).value == 42, "");
|
||||
}
|
||||
}
|
||||
|
||||
int main() {
|
||||
test_copy_ctor_basic();
|
||||
test_copy_ctor_sfinae();
|
||||
}
|
||||
@@ -1,153 +0,0 @@
|
||||
// -*- C++ -*-
|
||||
//===----------------------------------------------------------------------===//
|
||||
//
|
||||
// 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
|
||||
|
||||
// <variant>
|
||||
|
||||
// template <class ...Types> class variant;
|
||||
|
||||
// variant(variant&&) noexcept(see below);
|
||||
|
||||
#include <type_traits>
|
||||
#include <variant>
|
||||
|
||||
#include "test_macros.h"
|
||||
|
||||
struct NTMove {
|
||||
constexpr NTMove(int v) : value(v) {}
|
||||
NTMove(const NTMove &) = delete;
|
||||
NTMove(NTMove &&that) : value(that.value) { that.value = -1; }
|
||||
int value;
|
||||
};
|
||||
|
||||
static_assert(!std::is_trivially_move_constructible<NTMove>::value, "");
|
||||
static_assert(std::is_move_constructible<NTMove>::value, "");
|
||||
|
||||
struct TMove {
|
||||
constexpr TMove(int v) : value(v) {}
|
||||
TMove(const TMove &) = delete;
|
||||
TMove(TMove &&) = default;
|
||||
int value;
|
||||
};
|
||||
|
||||
static_assert(std::is_trivially_move_constructible<TMove>::value, "");
|
||||
|
||||
struct TMoveNTCopy {
|
||||
constexpr TMoveNTCopy(int v) : value(v) {}
|
||||
TMoveNTCopy(const TMoveNTCopy& that) : value(that.value) {}
|
||||
TMoveNTCopy(TMoveNTCopy&&) = default;
|
||||
int value;
|
||||
};
|
||||
|
||||
static_assert(std::is_trivially_move_constructible<TMoveNTCopy>::value, "");
|
||||
|
||||
void test_move_ctor_sfinae() {
|
||||
{
|
||||
using V = std::variant<int, long>;
|
||||
static_assert(std::is_trivially_move_constructible<V>::value, "");
|
||||
}
|
||||
{
|
||||
using V = std::variant<int, NTMove>;
|
||||
static_assert(!std::is_trivially_move_constructible<V>::value, "");
|
||||
static_assert(std::is_move_constructible<V>::value, "");
|
||||
}
|
||||
{
|
||||
using V = std::variant<int, TMove>;
|
||||
static_assert(std::is_trivially_move_constructible<V>::value, "");
|
||||
}
|
||||
{
|
||||
using V = std::variant<int, TMoveNTCopy>;
|
||||
static_assert(std::is_trivially_move_constructible<V>::value, "");
|
||||
}
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
struct Result { size_t index; T value; };
|
||||
|
||||
void test_move_ctor_basic() {
|
||||
{
|
||||
struct {
|
||||
constexpr Result<int> operator()() const {
|
||||
std::variant<int> v(std::in_place_index<0>, 42);
|
||||
std::variant<int> v2 = std::move(v);
|
||||
return {v2.index(), std::get<0>(std::move(v2))};
|
||||
}
|
||||
} test;
|
||||
constexpr auto result = test();
|
||||
static_assert(result.index == 0, "");
|
||||
static_assert(result.value == 42, "");
|
||||
}
|
||||
{
|
||||
struct {
|
||||
constexpr Result<long> operator()() const {
|
||||
std::variant<int, long> v(std::in_place_index<1>, 42);
|
||||
std::variant<int, long> v2 = std::move(v);
|
||||
return {v2.index(), std::get<1>(std::move(v2))};
|
||||
}
|
||||
} test;
|
||||
constexpr auto result = test();
|
||||
static_assert(result.index == 1, "");
|
||||
static_assert(result.value == 42, "");
|
||||
}
|
||||
{
|
||||
struct {
|
||||
constexpr Result<TMove> operator()() const {
|
||||
std::variant<TMove> v(std::in_place_index<0>, 42);
|
||||
std::variant<TMove> v2(std::move(v));
|
||||
return {v2.index(), std::get<0>(std::move(v2))};
|
||||
}
|
||||
} test;
|
||||
constexpr auto result = test();
|
||||
static_assert(result.index == 0, "");
|
||||
static_assert(result.value.value == 42, "");
|
||||
}
|
||||
{
|
||||
struct {
|
||||
constexpr Result<TMove> operator()() const {
|
||||
std::variant<int, TMove> v(std::in_place_index<1>, 42);
|
||||
std::variant<int, TMove> v2(std::move(v));
|
||||
return {v2.index(), std::get<1>(std::move(v2))};
|
||||
}
|
||||
} test;
|
||||
constexpr auto result = test();
|
||||
static_assert(result.index == 1, "");
|
||||
static_assert(result.value.value == 42, "");
|
||||
}
|
||||
{
|
||||
struct {
|
||||
constexpr Result<TMoveNTCopy> operator()() const {
|
||||
std::variant<TMoveNTCopy> v(std::in_place_index<0>, 42);
|
||||
std::variant<TMoveNTCopy> v2(std::move(v));
|
||||
return {v2.index(), std::get<0>(std::move(v2))};
|
||||
}
|
||||
} test;
|
||||
constexpr auto result = test();
|
||||
static_assert(result.index == 0, "");
|
||||
static_assert(result.value.value == 42, "");
|
||||
}
|
||||
{
|
||||
struct {
|
||||
constexpr Result<TMoveNTCopy> operator()() const {
|
||||
std::variant<int, TMoveNTCopy> v(std::in_place_index<1>, 42);
|
||||
std::variant<int, TMoveNTCopy> v2(std::move(v));
|
||||
return {v2.index(), std::get<1>(std::move(v2))};
|
||||
}
|
||||
} test;
|
||||
constexpr auto result = test();
|
||||
static_assert(result.index == 1, "");
|
||||
static_assert(result.value.value == 42, "");
|
||||
}
|
||||
}
|
||||
|
||||
int main() {
|
||||
test_move_ctor_basic();
|
||||
test_move_ctor_sfinae();
|
||||
}
|
||||
Reference in New Issue
Block a user