Merge pull request #2401 from kuzkry:custom-type-traits-add_lvalue_reference

PiperOrigin-RevId: 264842713

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

@@ -1019,19 +1019,6 @@ inline void FlushInfoLog() { fflush(nullptr); }
     GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
                       << gtest_error
 
-// Adds reference to a type if it is not a reference type,
-// otherwise leaves it unchanged.  This is the same as
-// tr1::add_reference, which is not widely available yet.
-template <typename T>
-struct AddReference { typedef T& type; };  // NOLINT
-template <typename T>
-struct AddReference<T&> { typedef T& type; };  // NOLINT
-
-// A handy wrapper around AddReference that works when the argument T
-// depends on template parameters.
-#define GTEST_ADD_REFERENCE_(T) \
-    typename ::testing::internal::AddReference<T>::type
-
 // Transforms "T" into "const T&" according to standard reference collapsing
 // rules (this is only needed as a backport for C++98 compilers that do not
 // support reference collapsing). Specifically, it transforms:

googletest/test/gtest_unittest.cc

@@ -227,7 +227,6 @@ using testing::TestProperty;
 using testing::TestResult;
 using testing::TimeInMillis;
 using testing::UnitTest;
-using testing::internal::AddReference;
 using testing::internal::AlwaysFalse;
 using testing::internal::AlwaysTrue;
 using testing::internal::AppendUserMessage;
@@ -7150,30 +7149,6 @@ TEST(RemoveReferenceToConstTest, Works) {
   TestGTestRemoveReferenceAndConst<const char*, const char*>();
 }
 
-// Tests that AddReference does not affect reference types.
-TEST(AddReferenceTest, DoesNotAffectReferenceType) {
-  CompileAssertTypesEqual<int&, AddReference<int&>::type>();
-  CompileAssertTypesEqual<const char&, AddReference<const char&>::type>();
-}
-
-// Tests that AddReference adds reference to non-reference types.
-TEST(AddReferenceTest, AddsReference) {
-  CompileAssertTypesEqual<int&, AddReference<int>::type>();
-  CompileAssertTypesEqual<const char&, AddReference<const char>::type>();
-}
-
-// Tests GTEST_ADD_REFERENCE_.
-
-template <typename T1, typename T2>
-void TestGTestAddReference() {
-  CompileAssertTypesEqual<T1, GTEST_ADD_REFERENCE_(T2)>();
-}
-
-TEST(AddReferenceTest, MacroVersion) {
-  TestGTestAddReference<int&, int>();
-  TestGTestAddReference<const char&, const char&>();
-}
-
 // Tests GTEST_REFERENCE_TO_CONST_.
 
 template <typename T1, typename T2>