Simplify the base characteristics for some type traits

* include/std/type_traits (__is_member_object_pointer_helper): Use
	__not_<is_function<_Tp>>::type instead of integral_constant.
	(__is_member_function_pointer_helper): Likewise for
	is_function<_Tp>::type.
	(is_compund): Likewise for __not_<is_fundamental<_Tp>>::type.
	(__do_is_nt_destructible_impl): Use __bool_constant and reindent.
	(is_trivially_constructible): Remove redundant use of
	is_constructible.
	(__is_trivially_copy_assignable_impl): Remove redundant use of
	is_copy_assignable.
	(__is_trivially_move_assignable_impl): Remove redundant use of
	is_move_assignable.
	(is_trivially_destructible): Use __bool_constant.
	* testsuite/20_util/is_trivially_assignable/value.cc: Add some more
	tests for scalar types.

From-SVN: r262889

libstdc++-v3/ChangeLog

@@ -1,3 +1,21 @@
+2018-07-19  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/std/type_traits (__is_member_object_pointer_helper): Use
+	__not_<is_function<_Tp>>::type instead of integral_constant.
+	(__is_member_function_pointer_helper): Likewise for
+	is_function<_Tp>::type.
+	(is_compund): Likewise for __not_<is_fundamental<_Tp>>::type.
+	(__do_is_nt_destructible_impl): Use __bool_constant and reindent.
+	(is_trivially_constructible): Remove redundant use of
+	is_constructible.
+	(__is_trivially_copy_assignable_impl): Remove redundant use of
+	is_copy_assignable.
+	(__is_trivially_move_assignable_impl): Remove redundant use of
+	is_move_assignable.
+	(is_trivially_destructible): Use __bool_constant.
+	* testsuite/20_util/is_trivially_assignable/value.cc: Add some more
+	tests for scalar types.
+
 2018-07-19  Glen Joseph Fernandes  <glenjofe@gmail.com>
 
 	* include/bits/stl_algobase.h (__copy_move_a): Used

libstdc++-v3/include/std/type_traits

@@ -396,7 +396,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   template<typename _Tp, typename _Cp>
     struct __is_member_object_pointer_helper<_Tp _Cp::*>
-    : public integral_constant<bool, !is_function<_Tp>::value> { };
+    : public __not_<is_function<_Tp>>::type { };
 
   /// is_member_object_pointer
   template<typename _Tp>
@@ -411,7 +411,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   template<typename _Tp, typename _Cp>
     struct __is_member_function_pointer_helper<_Tp _Cp::*>
-    : public integral_constant<bool, is_function<_Tp>::value> { };
+    : public is_function<_Tp>::type { };
 
   /// is_member_function_pointer
   template<typename _Tp>
@@ -603,7 +603,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// is_compound
   template<typename _Tp>
     struct is_compound
-    : public integral_constant<bool, !is_fundamental<_Tp>::value> { };
+    : public __not_<is_fundamental<_Tp>>::type { };
 
   template<typename _Tp>
     struct __is_member_pointer_helper
@@ -826,7 +826,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   struct __do_is_nt_destructible_impl
   {
     template<typename _Tp>
-      static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())>
+      static __bool_constant<noexcept(declval<_Tp&>().~_Tp())>
       __test(int);
 
     template<typename>
@@ -1136,8 +1136,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// is_trivially_constructible
   template<typename _Tp, typename... _Args>
     struct is_trivially_constructible
-    : public __and_<is_constructible<_Tp, _Args...>, __bool_constant<
+    : public __bool_constant<__is_trivially_constructible(_Tp, _Args...)>
-		      __is_trivially_constructible(_Tp, _Args...)>>::type
     { };
 
   /// is_trivially_default_constructible
@@ -1235,9 +1234,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   template<typename _Tp>
     struct __is_trivially_copy_assignable_impl<_Tp, true>
-    : public __and_<is_copy_assignable<_Tp>,
+    : public __bool_constant<__is_trivially_assignable(_Tp&, const _Tp&)>
-		    integral_constant<bool,
-			__is_trivially_assignable(_Tp&, const _Tp&)>>
     { };
 
   template<typename _Tp>
@@ -1256,9 +1253,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   template<typename _Tp>
     struct __is_trivially_move_assignable_impl<_Tp, true>
-    : public __and_<is_move_assignable<_Tp>,
+    : public __bool_constant<__is_trivially_assignable(_Tp&, _Tp&&)>
-		    integral_constant<bool,
-			__is_trivially_assignable(_Tp&, _Tp&&)>>
     { };
 
   template<typename _Tp>
@@ -1269,8 +1264,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// is_trivially_destructible
   template<typename _Tp>
     struct is_trivially_destructible
-    : public __and_<is_destructible<_Tp>, integral_constant<bool,
+    : public __and_<is_destructible<_Tp>,
-			      __has_trivial_destructor(_Tp)>>
+		    __bool_constant<__has_trivial_destructor(_Tp)>>
     { };
 
 

libstdc++-v3/testsuite/20_util/is_trivially_assignable/value.cc

@@ -54,6 +54,28 @@ void test01()
 		int&, int&&>(true), "");
   static_assert(test_property<is_trivially_assignable,
 		int&, const int&>(true), "");
+  static_assert(test_property<is_trivially_assignable,
+		int&, int*>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		int&, void*>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		const int, int>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		const int&, int>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		const int&, const int&>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		const int*&, int*>(true), "");
+  static_assert(test_property<is_trivially_assignable,
+		int*&, const int*&>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		int*&, const int&>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		const int*&, void*>(false), "");
+  static_assert(test_property<is_trivially_assignable,
+		const void*&, void*>(true), "");
+  static_assert(test_property<is_trivially_assignable,
+		const void*&, int*>(true), "");
 
   static_assert(test_property<is_trivially_assignable,
 		TType, TType>(true), "");