Use C++11 static_assert in variant tests. Patch from Michael Park

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291021 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/libcxx/utilities/variant/variant.variant/variant.ctor/copy.pass.cpp b/test/libcxx/utilities/variant/variant.variant/variant.ctor/copy.pass.cpp
index 59c4330..0d30a78 100644
--- a/test/libcxx/utilities/variant/variant.variant/variant.ctor/copy.pass.cpp
+++ b/test/libcxx/utilities/variant/variant.variant/variant.ctor/copy.pass.cpp
@@ -72,45 +72,45 @@
 void test_copy_ctor_basic() {
   {
     constexpr std::variant<int> v(std::in_place_index<0>, 42);
-    static_assert(v.index() == 0);
+    static_assert(v.index() == 0, "");
     constexpr std::variant<int> v2 = v;
-    static_assert(v2.index() == 0);
-    static_assert(std::get<0>(v2) == 42);
+    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);
+    static_assert(v.index() == 1, "");
     constexpr std::variant<int, long> v2 = v;
-    static_assert(v2.index() == 1);
-    static_assert(std::get<1>(v2) == 42);
+    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);
+    static_assert(v.index() == 0, "");
     constexpr std::variant<TCopy> v2(v);
-    static_assert(v2.index() == 0);
-    static_assert(std::get<0>(v2).value == 42);
+    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);
+    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);
+    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);
+    static_assert(v.index() == 0, "");
     constexpr std::variant<TCopyNTMove> v2(v);
-    static_assert(v2.index() == 0);
-    static_assert(std::get<0>(v2).value == 42);
+    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);
+    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);
+    static_assert(v2.index() == 1, "");
+    static_assert(std::get<1>(v2).value == 42, "");
   }
 }
 
diff --git a/test/libcxx/utilities/variant/variant.variant/variant.ctor/move.pass.cpp b/test/libcxx/utilities/variant/variant.variant/variant.ctor/move.pass.cpp
index e67a495..91e8c19 100644
--- a/test/libcxx/utilities/variant/variant.variant/variant.ctor/move.pass.cpp
+++ b/test/libcxx/utilities/variant/variant.variant/variant.ctor/move.pass.cpp
@@ -82,8 +82,8 @@
       }
     } test;
     constexpr auto result = test();
-    static_assert(result.index == 0);
-    static_assert(result.value == 42);
+    static_assert(result.index == 0, "");
+    static_assert(result.value == 42, "");
   }
   {
     struct {
@@ -94,8 +94,8 @@
       }
     } test;
     constexpr auto result = test();
-    static_assert(result.index == 1);
-    static_assert(result.value == 42);
+    static_assert(result.index == 1, "");
+    static_assert(result.value == 42, "");
   }
   {
     struct {
@@ -106,8 +106,8 @@
       }
     } test;
     constexpr auto result = test();
-    static_assert(result.index == 0);
-    static_assert(result.value.value == 42);
+    static_assert(result.index == 0, "");
+    static_assert(result.value.value == 42, "");
   }
   {
     struct {
@@ -118,8 +118,8 @@
       }
     } test;
     constexpr auto result = test();
-    static_assert(result.index == 1);
-    static_assert(result.value.value == 42);
+    static_assert(result.index == 1, "");
+    static_assert(result.value.value == 42, "");
   }
   {
     struct {
@@ -130,8 +130,8 @@
       }
     } test;
     constexpr auto result = test();
-    static_assert(result.index == 0);
-    static_assert(result.value.value == 42);
+    static_assert(result.index == 0, "");
+    static_assert(result.value.value == 42, "");
   }
   {
     struct {
@@ -142,8 +142,8 @@
       }
     } test;
     constexpr auto result = test();
-    static_assert(result.index == 1);
-    static_assert(result.value.value == 42);
+    static_assert(result.index == 1, "");
+    static_assert(result.value.value == 42, "");
   }
 }
 
diff --git a/test/std/utilities/variant/variant.variant/variant.swap/swap.pass.cpp b/test/std/utilities/variant/variant.variant/variant.swap/swap.pass.cpp
index 416c6b4..48cda22 100644
--- a/test/std/utilities/variant/variant.variant/variant.swap/swap.pass.cpp
+++ b/test/std/utilities/variant/variant.variant/variant.swap/swap.pass.cpp
@@ -489,7 +489,7 @@
     // but is still swappable via the generic swap algorithm, since the
     // variant is move constructible and move assignable.
     using V = std::variant<int, NotSwappable>;
-    LIBCPP_STATIC_ASSERT(!has_swap_member<V>());
+    LIBCPP_STATIC_ASSERT(!has_swap_member<V>(), "");
     static_assert(std::is_swappable_v<V>, "");
   }
   {
@@ -569,7 +569,7 @@
     // but is still swappable via the generic swap algorithm, since the
     // variant is move constructible and move assignable.
     using V = std::variant<int, NotSwappable>;
-    LIBCPP_STATIC_ASSERT(!has_swap_member<V>());
+    LIBCPP_STATIC_ASSERT(!has_swap_member<V>(), "");
     static_assert(std::is_swappable_v<V>, "");
     static_assert(std::is_nothrow_swappable_v<V>, "");
     V v1, v2;