1 files changed, 132 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/variant/variant.get/get_if_index.pass.cpp b/libcxx/test/std/utilities/variant/variant.get/get_if_index.pass.cpp
new file mode 100644
index 00000000000..2ea88e346ae
--- /dev/null
+++ b/libcxx/test/std/utilities/variant/variant.get/get_if_index.pass.cpp
@@ -0,0 +1,132 @@
+// -*- 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 <size_t I, class... Types>
+//  constexpr add_pointer_t<variant_alternative_t<I, variant<Types...>>>
+//   get_if(variant<Types...>* v) noexcept;
+// template <size_t I, class... Types>
+//  constexpr add_pointer_t<const variant_alternative_t<I, variant<Types...>>>
+//   get_if(const variant<Types...>* v) noexcept;
+
+#include "test_macros.h"
+#include "variant_test_helpers.hpp"
+#include <cassert>
+#include <memory>
+#include <variant>
+
+void test_const_get_if() {
+  {
+    using V = std::variant<int>;
+    constexpr const V *v = nullptr;
+    static_assert(std::get_if<0>(v) == nullptr, "");
+  }
+  {
+    using V = std::variant<int, long>;
+    constexpr V v(42);
+    ASSERT_NOEXCEPT(std::get_if<0>(&v));
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), int const *);
+    static_assert(*std::get_if<0>(&v) == 42, "");
+    static_assert(std::get_if<1>(&v) == nullptr, "");
+  }
+  {
+    using V = std::variant<int, long>;
+    constexpr V v(42l);
+    ASSERT_SAME_TYPE(decltype(std::get_if<1>(&v)), long const *);
+    static_assert(*std::get_if<1>(&v) == 42, "");
+    static_assert(std::get_if<0>(&v) == nullptr, "");
+  }
+// FIXME: Remove these once reference support is reinstated
+#if !defined(TEST_VARIANT_HAS_NO_REFERENCES)
+  {
+    using V = std::variant<int &>;
+    int x = 42;
+    const V v(x);
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+  {
+    using V = std::variant<int &&>;
+    int x = 42;
+    const V v(std::move(x));
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+  {
+    using V = std::variant<const int &&>;
+    int x = 42;
+    const V v(std::move(x));
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), const int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+#endif
+}
+
+void test_get_if() {
+  {
+    using V = std::variant<int>;
+    V *v = nullptr;
+    assert(std::get_if<0>(v) == nullptr);
+  }
+  {
+    using V = std::variant<int, long>;
+    V v(42);
+    ASSERT_NOEXCEPT(std::get_if<0>(&v));
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), int *);
+    assert(*std::get_if<0>(&v) == 42);
+    assert(std::get_if<1>(&v) == nullptr);
+  }
+  {
+    using V = std::variant<int, long>;
+    V v(42l);
+    ASSERT_SAME_TYPE(decltype(std::get_if<1>(&v)), long *);
+    assert(*std::get_if<1>(&v) == 42);
+    assert(std::get_if<0>(&v) == nullptr);
+  }
+// FIXME: Remove these once reference support is reinstated
+#if !defined(TEST_VARIANT_HAS_NO_REFERENCES)
+  {
+    using V = std::variant<int &>;
+    int x = 42;
+    V v(x);
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+  {
+    using V = std::variant<const int &>;
+    int x = 42;
+    V v(x);
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), const int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+  {
+    using V = std::variant<int &&>;
+    int x = 42;
+    V v(std::move(x));
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+  {
+    using V = std::variant<const int &&>;
+    int x = 42;
+    V v(std::move(x));
+    ASSERT_SAME_TYPE(decltype(std::get_if<0>(&v)), const int *);
+    assert(std::get_if<0>(&v) == &x);
+  }
+#endif
+}
+
+int main() {
+  test_const_get_if();
+  test_get_if();
+}