Add natvis and improve cpp.hint setting

CMakeLists.txt

@@ -24,6 +24,12 @@ if(MSVC)
         PRIVATE
             # required for determining correct `/std:` flag
             "${PROJECT_SOURCE_DIR}/test/dummy.cpp"
+
+            # It seems like these should be `PRIVATE`, otherwise
+            # it'll be added to all dependent targets and yields
+            # "Warning: Conflicting <Type> entries detected"
+            "${PROJECT_SOURCE_DIR}/rvariant.natvis"
+            "${PROJECT_SOURCE_DIR}/cpp.hint"
     )
 else()
     add_library(rvariant INTERFACE)

cpp.hint

@@ -5,6 +5,7 @@
 // Hint files help the Visual Studio IDE interpret Visual C++ identifiers
 // such as names of functions and macros.
 // For more information see https://go.microsoft.com/fwlink/?linkid=865984
+
 #define YK_RVARIANT_VISIT_NOEXCEPT
 
 #define YK_RVARIANT_ALWAYS_THROWING_UNREACHABLE_BEGIN
@@ -18,11 +19,3 @@
 
 #define YK_FORCEINLINE
 #define YK_LIFETIMEBOUND
-
-#define TEST_CASE
-#define REQUIRE
-#define STATIC_REQUIRE
-#define CHECK
-#define STATIC_CHECK
-
-#define YK_REQUIRE_STATIC_NOTHROW