Googletest export

Introduce GTEST_FLAG_GET and GTEST_FLAG_SET macros.

PiperOrigin-RevId: 382808313

googletest/test/gtest_environment_test.cc

@@ -35,10 +35,6 @@
 #include "gtest/gtest.h"
 #include "src/gtest-internal-inl.h"
 
-namespace testing {
-GTEST_DECLARE_string_(filter);
-}
-
 namespace {
 
 enum FailureType {
@@ -174,7 +170,7 @@ int main(int argc, char **argv) {
 
   // Verifies that RUN_ALL_TESTS() doesn't do global set-up or
   // tear-down when there is no test to run.
-  testing::GTEST_FLAG(filter) = "-*";
+  GTEST_FLAG_SET(filter, "-*");
   Check(RunAllTests(env, NO_FAILURE) == 0,
         "RUN_ALL_TESTS() should return zero, as there is no test to run.");
   Check(!env->set_up_was_run(),