PR libstdc++/84769 qualify std::get and std::get_if to avoid ADL

	PR libstdc++/84769
	* include/std/variant (get<_Tp, _Types...>, get_if<_Tp, _Types...>):
	Qualify calls to get<_Np, Types...> and get_if<_Np, _Types...>.

From-SVN: r258376

libstdc++-v3/ChangeLog

 2018-03-09  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/84769
+	* include/std/variant (get<_Tp, _Types...>, get_if<_Tp, _Types...>):
+	Qualify calls to get<_Np, Types...> and get_if<_Np, _Types...>.
+
 	src/filesystem/ops.cc (create_dir): Pass error_code to is_directory.
 	src/filesystem/std-ops.cc (create_dir): Likewise.
 

libstdc++-v3/include/std/variant

@@ -891,7 +891,7 @@ namespace __variant
       static_assert(__detail::__variant::__exactly_once<_Tp, _Types...>,
 		    "T should occur for exactly once in alternatives");
       static_assert(!is_void_v<_Tp>, "_Tp should not be void");
-      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
+      return std::get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
     }
 
   template<typename _Tp, typename... _Types>
@@ -900,7 +900,7 @@ namespace __variant
       static_assert(__detail::__variant::__exactly_once<_Tp, _Types...>,
 		    "T should occur for exactly once in alternatives");
       static_assert(!is_void_v<_Tp>, "_Tp should not be void");
-      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(
+      return std::get<__detail::__variant::__index_of_v<_Tp, _Types...>>(
 	std::move(__v));
     }
 
@@ -910,7 +910,7 @@ namespace __variant
       static_assert(__detail::__variant::__exactly_once<_Tp, _Types...>,
 		    "T should occur for exactly once in alternatives");
       static_assert(!is_void_v<_Tp>, "_Tp should not be void");
-      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
+      return std::get<__detail::__variant::__index_of_v<_Tp, _Types...>>(__v);
     }
 
   template<typename _Tp, typename... _Types>
@@ -919,7 +919,7 @@ namespace __variant
       static_assert(__detail::__variant::__exactly_once<_Tp, _Types...>,
 		    "T should occur for exactly once in alternatives");
       static_assert(!is_void_v<_Tp>, "_Tp should not be void");
-      return get<__detail::__variant::__index_of_v<_Tp, _Types...>>(
+      return std::get<__detail::__variant::__index_of_v<_Tp, _Types...>>(
 	std::move(__v));
     }
 
@@ -958,7 +958,8 @@ namespace __variant
       static_assert(__detail::__variant::__exactly_once<_Tp, _Types...>,
 		    "T should occur for exactly once in alternatives");
       static_assert(!is_void_v<_Tp>, "_Tp should not be void");
-      return get_if<__detail::__variant::__index_of_v<_Tp, _Types...>>(__ptr);
+      return std::get_if<__detail::__variant::__index_of_v<_Tp, _Types...>>(
+	  __ptr);
     }
 
   template<typename _Tp, typename... _Types>
@@ -969,7 +970,8 @@ namespace __variant
       static_assert(__detail::__variant::__exactly_once<_Tp, _Types...>,
 		    "T should occur for exactly once in alternatives");
       static_assert(!is_void_v<_Tp>, "_Tp should not be void");
-      return get_if<__detail::__variant::__index_of_v<_Tp, _Types...>>(__ptr);
+      return std::get_if<__detail::__variant::__index_of_v<_Tp, _Types...>>(
+	  __ptr);
     }
 
   struct monostate { };