Add <variant> tests but disable them for libc++
llvm-svn: 287728
diff --git a/libcxx/test/std/utilities/variant/variant.relops/relops.pass.cpp b/libcxx/test/std/utilities/variant/variant.relops/relops.pass.cpp
new file mode 100644
index 0000000..51712ff
--- /dev/null
+++ b/libcxx/test/std/utilities/variant/variant.relops/relops.pass.cpp
@@ -0,0 +1,227 @@
+// -*- 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>
+// constexpr bool
+// operator==(variant<Types...> const&, variant<Types...> const&) noexcept;
+//
+// template <class ...Types>
+// constexpr bool
+// operator!=(variant<Types...> const&, variant<Types...> const&) noexcept;
+//
+// template <class ...Types>
+// constexpr bool
+// operator<(variant<Types...> const&, variant<Types...> const&) noexcept;
+//
+// template <class ...Types>
+// constexpr bool
+// operator>(variant<Types...> const&, variant<Types...> const&) noexcept;
+//
+// template <class ...Types>
+// constexpr bool
+// operator<=(variant<Types...> const&, variant<Types...> const&) noexcept;
+//
+// template <class ...Types>
+// constexpr bool
+// operator>=(variant<Types...> const&, variant<Types...> const&) noexcept;
+
+#include <cassert>
+#include <type_traits>
+#include <utility>
+#include <variant>
+
+#include "test_macros.h"
+
+#ifndef TEST_HAS_NO_EXCEPTIONS
+struct MakeEmptyT {
+ MakeEmptyT() = default;
+ MakeEmptyT(MakeEmptyT &&) { throw 42; }
+ MakeEmptyT &operator=(MakeEmptyT &&) { throw 42; }
+};
+inline bool operator==(MakeEmptyT const &, MakeEmptyT const &) {
+ assert(false);
+ return false;
+}
+inline bool operator!=(MakeEmptyT const &, MakeEmptyT const &) {
+ assert(false);
+ return false;
+}
+inline bool operator<(MakeEmptyT const &, MakeEmptyT const &) {
+ assert(false);
+ return false;
+}
+inline bool operator<=(MakeEmptyT const &, MakeEmptyT const &) {
+ assert(false);
+ return false;
+}
+inline bool operator>(MakeEmptyT const &, MakeEmptyT const &) {
+ assert(false);
+ return false;
+}
+inline bool operator>=(MakeEmptyT const &, MakeEmptyT const &) {
+ assert(false);
+ return false;
+}
+
+template <class Variant> void makeEmpty(Variant &v) {
+ Variant v2(std::in_place_type<MakeEmptyT>);
+ try {
+ v = std::move(v2);
+ assert(false);
+ } catch (...) {
+ assert(v.valueless_by_exception());
+ }
+}
+#endif // TEST_HAS_NO_EXCEPTIONS
+
+void test_equality() {
+ {
+ using V = std::variant<int, long>;
+ constexpr V v1(42);
+ constexpr V v2(42);
+ static_assert(v1 == v2, "");
+ static_assert(v2 == v1, "");
+ static_assert(!(v1 != v2), "");
+ static_assert(!(v2 != v1), "");
+ }
+ {
+ using V = std::variant<int, long>;
+ constexpr V v1(42);
+ constexpr V v2(43);
+ static_assert(!(v1 == v2), "");
+ static_assert(!(v2 == v1), "");
+ static_assert(v1 != v2, "");
+ static_assert(v2 != v1, "");
+ }
+ {
+ using V = std::variant<int, long>;
+ constexpr V v1(42);
+ constexpr V v2(42l);
+ static_assert(!(v1 == v2), "");
+ static_assert(!(v2 == v1), "");
+ static_assert(v1 != v2, "");
+ static_assert(v2 != v1, "");
+ }
+ {
+ using V = std::variant<int, long>;
+ constexpr V v1(42l);
+ constexpr V v2(42l);
+ static_assert(v1 == v2, "");
+ static_assert(v2 == v1, "");
+ static_assert(!(v1 != v2), "");
+ static_assert(!(v2 != v1), "");
+ }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+ {
+ using V = std::variant<int, MakeEmptyT>;
+ V v1;
+ V v2;
+ makeEmpty(v2);
+ assert(!(v1 == v2));
+ assert(!(v2 == v1));
+ assert(v1 != v2);
+ assert(v2 != v1);
+ }
+ {
+ using V = std::variant<int, MakeEmptyT>;
+ V v1;
+ makeEmpty(v1);
+ V v2;
+ assert(!(v1 == v2));
+ assert(!(v2 == v1));
+ assert(v1 != v2);
+ assert(v2 != v1);
+ }
+ {
+ using V = std::variant<int, MakeEmptyT>;
+ V v1;
+ makeEmpty(v1);
+ V v2;
+ makeEmpty(v2);
+ assert(v1 == v2);
+ assert(v2 == v1);
+ assert(!(v1 != v2));
+ assert(!(v2 != v1));
+ }
+#endif
+}
+
+template <class Var>
+constexpr bool test_less(Var const &l, Var const &r, bool expect_less,
+ bool expect_greater) {
+ return ((l < r) == expect_less) && (!(l >= r) == expect_less) &&
+ ((l > r) == expect_greater) && (!(l <= r) == expect_greater);
+}
+
+void test_relational() {
+ { // same index, same value
+ using V = std::variant<int, long>;
+ constexpr V v1(1);
+ constexpr V v2(1);
+ static_assert(test_less(v1, v2, false, false), "");
+ }
+ { // same index, value < other_value
+ using V = std::variant<int, long>;
+ constexpr V v1(0);
+ constexpr V v2(1);
+ static_assert(test_less(v1, v2, true, false), "");
+ }
+ { // same index, value > other_value
+ using V = std::variant<int, long>;
+ constexpr V v1(1);
+ constexpr V v2(0);
+ static_assert(test_less(v1, v2, false, true), "");
+ }
+ { // LHS.index() < RHS.index()
+ using V = std::variant<int, long>;
+ constexpr V v1(0);
+ constexpr V v2(0l);
+ static_assert(test_less(v1, v2, true, false), "");
+ }
+ { // LHS.index() > RHS.index()
+ using V = std::variant<int, long>;
+ constexpr V v1(0l);
+ constexpr V v2(0);
+ static_assert(test_less(v1, v2, false, true), "");
+ }
+#ifndef TEST_HAS_NO_EXCEPTIONS
+ { // LHS.index() < RHS.index(), RHS is empty
+ using V = std::variant<int, MakeEmptyT>;
+ V v1;
+ V v2;
+ makeEmpty(v2);
+ assert(test_less(v1, v2, false, true));
+ }
+ { // LHS.index() > RHS.index(), LHS is empty
+ using V = std::variant<int, MakeEmptyT>;
+ V v1;
+ makeEmpty(v1);
+ V v2;
+ assert(test_less(v1, v2, true, false));
+ }
+ { // LHS.index() == RHS.index(), LHS and RHS are empty
+ using V = std::variant<int, MakeEmptyT>;
+ V v1;
+ makeEmpty(v1);
+ V v2;
+ makeEmpty(v2);
+ assert(test_less(v1, v2, false, false));
+ }
+#endif
+}
+
+int main() {
+ test_equality();
+ test_relational();
+}