remove custom implementations of std::is_samerefs/pull/2399/head

3 files changed, 10 insertions, 24 deletions

diff --git a/googletest/include/gtest/gtest-matchers.h b/googletest/include/gtest/gtest-matchers.h
index 7711178..0548806 100644
--- a/googletest/include/gtest/gtest-matchers.h
+++ b/googletest/include/gtest/gtest-matchers.h
@@ -42,6 +42,7 @@
 #include <memory>
 #include <ostream>
 #include <string>
+#include <type_traits>
 
 #include "gtest/gtest-printers.h"
 #include "gtest/internal/gtest-internal.h"
@@ -299,8 +300,8 @@ class MatcherBase {
   template <typename U>
   explicit MatcherBase(
       const MatcherInterface<U>* impl,
-      typename internal::EnableIf<
-          !internal::IsSame<U, const U&>::value>::type* = nullptr)
+      typename internal::EnableIf<!std::is_same<U, const U&>::value>::type* =
+          nullptr)
       : impl_(new internal::MatcherInterfaceAdapter<U>(impl)) {}
 
   MatcherBase(const MatcherBase&) = default;
@@ -333,9 +334,10 @@ class Matcher : public internal::MatcherBase<T> {
       : internal::MatcherBase<T>(impl) {}
 
   template <typename U>
-  explicit Matcher(const MatcherInterface<U>* impl,
-                   typename internal::EnableIf<
-                       !internal::IsSame<U, const U&>::value>::type* = nullptr)
+  explicit Matcher(
+      const MatcherInterface<U>* impl,
+      typename internal::EnableIf<!std::is_same<U, const U&>::value>::type* =
+          nullptr)
       : internal::MatcherBase<T>(impl) {}
 
   // Implicit constructor here allows people to write
diff --git a/googletest/include/gtest/internal/gtest-internal.h b/googletest/include/gtest/internal/gtest-internal.h
index 08531d8..240d791 100644
--- a/googletest/include/gtest/internal/gtest-internal.h
+++ b/googletest/include/gtest/internal/gtest-internal.h
@@ -977,9 +977,9 @@ template <typename C>
 struct IsRecursiveContainerImpl<C, true> {
   using value_type = decltype(*std::declval<typename C::const_iterator>());
   using type =
-      is_same<typename std::remove_const<
-                  typename std::remove_reference<value_type>::type>::type,
-              C>;
+      std::is_same<typename std::remove_const<
+                       typename std::remove_reference<value_type>::type>::type,
+                   C>;
 };
 
 // IsRecursiveContainer<Type> is a unary compile-time predicate that
diff --git a/googletest/include/gtest/internal/gtest-port.h b/googletest/include/gtest/internal/gtest-port.h
index 4f887c5..7f00fe7 100644
--- a/googletest/include/gtest/internal/gtest-port.h
+++ b/googletest/include/gtest/internal/gtest-port.h
@@ -869,16 +869,6 @@ struct StaticAssertTypeEqHelper<T, T> {
   enum { value = true };
 };
 
-// Same as std::is_same<>.
-template <typename T, typename U>
-struct IsSame {
-  enum { value = false };
-};
-template <typename T>
-struct IsSame<T, T> {
-  enum { value = true };
-};
-
 // Evaluates to the number of elements in 'array'.
 #define GTEST_ARRAY_SIZE_(array) (sizeof(array) / sizeof(array[0]))
 
@@ -1931,12 +1921,6 @@ template <bool bool_value> const bool bool_constant<bool_value>::value;
 typedef bool_constant<false> false_type;
 typedef bool_constant<true> true_type;
 
-template <typename T, typename U>
-struct is_same : public false_type {};
-
-template <typename T>
-struct is_same<T, T> : public true_type {};
-
 template <typename Iterator>
 struct IteratorTraits {
   typedef typename Iterator::value_type value_type;