Googletest export

Fixed #2823 - Make it so that a semicolon appearing after an invocation of GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ does not trigger a redundant semicolon warning.

This works by introducing an else block with a statement that intentionally does not end with a semicolon, forcing users to place the semicolon after the expansion. The approach here is preferred as opposed to removing semicolons that appear after each invocation because complete statements that do not have a visible semicolon or braces confuse users and code formatters, since the macro invocation looks superficially like an expression.

PiperOrigin-RevId: 311327491

googletest/include/gtest/internal/gtest-internal.h

@@ -1283,8 +1283,13 @@ constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
 // Suppress MSVC warning 4072 (unreachable code) for the code following
 // statement if it returns or throws (or doesn't return or throw in some
 // situations).
+// NOTE: The "else" is important to keep this expansion to prevent a top-level
+// "else" from attaching to our "if".
 #define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
-  if (::testing::internal::AlwaysTrue()) { statement; }
+  if (::testing::internal::AlwaysTrue()) {                        \
+    statement;                                                    \
+  } else                     /* NOLINT */                         \
+    static_assert(true, "")  // User must have a semicolon after expansion.
 
 #define GTEST_TEST_THROW_(statement, expected_exception, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \