From 11471da7938bb414a5739e292ccc71f18966068f Mon Sep 17 00:00:00 2001
From: Krystian Kuzniarek <krystian.kuzniarek@gmail.com>
Date: Tue, 13 Aug 2019 23:35:11 +0200
Subject: remove a custom implementation of std::enable_if

---
 googletest/include/gtest/gtest-matchers.h          | 12 +++++++-----
 googletest/include/gtest/gtest.h                   |  2 +-
 googletest/include/gtest/internal/gtest-internal.h |  7 -------
 3 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/googletest/include/gtest/gtest-matchers.h b/googletest/include/gtest/gtest-matchers.h
index 7711178..5eb0a4e 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 std::enable_if<!internal::IsSame<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 std::enable_if<!internal::IsSame<U, const U&>::value>::type* =
+          nullptr)
       : internal::MatcherBase<T>(impl) {}
 
   // Implicit constructor here allows people to write
diff --git a/googletest/include/gtest/gtest.h b/googletest/include/gtest/gtest.h
index db81359..dfe7c78 100644
--- a/googletest/include/gtest/gtest.h
+++ b/googletest/include/gtest/gtest.h
@@ -292,7 +292,7 @@ class GTEST_API_ AssertionResult {
   template <typename T>
   explicit AssertionResult(
       const T& success,
-      typename internal::EnableIf<
+      typename std::enable_if<
           !std::is_convertible<T, AssertionResult>::value>::type*
       /*enabler*/
       = nullptr)
diff --git a/googletest/include/gtest/internal/gtest-internal.h b/googletest/include/gtest/internal/gtest-internal.h
index 08531d8..8b05062 100644
--- a/googletest/include/gtest/internal/gtest-internal.h
+++ b/googletest/include/gtest/internal/gtest-internal.h
@@ -991,13 +991,6 @@ struct IsRecursiveContainerImpl<C, true> {
 template <typename C>
 struct IsRecursiveContainer : public IsRecursiveContainerImpl<C>::type {};
 
-// EnableIf<condition>::type is void when 'Cond' is true, and
-// undefined when 'Cond' is false.  To use SFINAE to make a function
-// overload only apply when a particular expression is true, add
-// "typename EnableIf<expression>::type* = 0" as the last parameter.
-template<bool> struct EnableIf;
-template<> struct EnableIf<true> { typedef void type; };  // NOLINT
-
 // Utilities for native arrays.
 
 // ArrayEq() compares two k-dimensional native arrays using the
-- 
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