Fix testsuite bugs

One of the static assertions in 20_util/function_objects/invoke/1.cc was
wrong, but didn't fail because by default it was compiled with
-std=gnu++14 which didn't use that static assertion. Split out the C++17
parts to a new file that always runs with -std=gnu++17, so those checks
are always done.

The 23_containers/unordered_set/allocator/ext_ptr.cc test is supposed to
be a run-time test but was unintentionally compile-only.

	* testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
	tests to ...
	* testsuite/20_util/function_objects/invoke/3.cc: New test.
	* testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
	"compile" test to "run".

From-SVN: r271584

libstdc++-v3/ChangeLog

 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
+	tests to ...
+	* testsuite/20_util/function_objects/invoke/3.cc: New test.
+	* testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
+	"compile" test to "run".
+
 	* doc/xml/manual/intro.xml: Document LWG DR 2996 change.
 	* doc/html/*: Regenerate.
 	* include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add

libstdc++-v3/testsuite/20_util/function_objects/invoke/1.cc

@@ -26,15 +26,6 @@ struct abstract {
 
 static_assert( noexcept(std::__invoke(std::declval<abstract>())),
     "It should be possible to use abstract types with INVOKE" );
-#if __cpp_lib_invoke
-// std::invoke is only defined since C++17.
-static_assert( noexcept(std::invoke(std::declval<abstract>())),
-    "It should be possible to use abstract types with INVOKE" );
-
-// The std::__invoke_r extension only has a noexcept-specifier for >= C++17.
-static_assert( noexcept(std::__invoke_r<void>(std::declval<abstract>())),
-    "It should be possible to use abstract types with INVOKE<R>" );
-#endif
 
 struct F {
   void operator()() &;
@@ -48,19 +39,3 @@ static_assert( !noexcept(std::__invoke(std::declval<F&>())), "" );
 static_assert( noexcept(std::__invoke(std::declval<F>())), "" );
 static_assert( !noexcept(std::__invoke(std::declval<F>(), 1)), "" );
 static_assert( noexcept(std::__invoke(std::declval<F>(), 1, 2)), "" );
-
-#if __cpp_lib_invoke
-static_assert( !noexcept(std::invoke(std::declval<F&>())), "" );
-static_assert( noexcept(std::invoke(std::declval<F>())), "" );
-static_assert( !noexcept(std::invoke(std::declval<F>(), 1)), "" );
-static_assert( noexcept(std::invoke(std::declval<F>(), 1, 2)), "" );
-
-static_assert( !noexcept(std::__invoke_r<void>(std::declval<F&>())), "" );
-static_assert( noexcept(std::__invoke_r<void>(std::declval<F>())), "" );
-static_assert( !noexcept(std::__invoke_r<int>(std::declval<F>(), 1)), "" );
-static_assert( !noexcept(std::__invoke_r<void>(std::declval<F>(), 1)), "" );
-static_assert( !noexcept(std::__invoke_r<long>(std::declval<F>(), 1)), "" );
-static_assert( noexcept(std::__invoke_r<void>(std::declval<F>(), 1, 2)), "" );
-static_assert( noexcept(std::__invoke_r<void*>(std::declval<F>(), 1, 2)), "" );
-static_assert( noexcept(std::__invoke_r<D>(std::declval<F>(), 1, 2)), "" );
-#endif

libstdc++-v3/testsuite/20_util/function_objects/invoke/3.cc

+// Copyright (C) 2016-2019 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++17 } }
+
+#include <functional>
+
+struct abstract {
+  virtual ~abstract() = 0;
+  void operator()() noexcept;
+};
+
+static_assert( noexcept(std::__invoke(std::declval<abstract>())),
+    "It should be possible to use abstract types with INVOKE" );
+static_assert( noexcept(std::invoke(std::declval<abstract>())),
+    "It should be possible to use abstract types with INVOKE" );
+
+// The std::__invoke_r extension only has a noexcept-specifier for >= C++17.
+static_assert( noexcept(std::__invoke_r<void>(std::declval<abstract>())),
+    "It should be possible to use abstract types with INVOKE<R>" );
+
+struct F {
+  void operator()() &;
+  void operator()() && noexcept;
+  int operator()(int);
+  double* operator()(int, int) noexcept;
+};
+struct D { D(void*); };
+
+static_assert( !noexcept(std::__invoke(std::declval<F&>())), "" );
+static_assert( noexcept(std::__invoke(std::declval<F>())), "" );
+static_assert( !noexcept(std::__invoke(std::declval<F>(), 1)), "" );
+static_assert( noexcept(std::__invoke(std::declval<F>(), 1, 2)), "" );
+
+static_assert( !noexcept(std::invoke(std::declval<F&>())), "" );
+static_assert( noexcept(std::invoke(std::declval<F>())), "" );
+static_assert( !noexcept(std::invoke(std::declval<F>(), 1)), "" );
+static_assert( noexcept(std::invoke(std::declval<F>(), 1, 2)), "" );
+
+static_assert( !noexcept(std::__invoke_r<void>(std::declval<F&>())), "" );
+static_assert( noexcept(std::__invoke_r<void>(std::declval<F>())), "" );
+static_assert( !noexcept(std::__invoke_r<int>(std::declval<F>(), 1)), "" );
+static_assert( !noexcept(std::__invoke_r<void>(std::declval<F>(), 1)), "" );
+static_assert( !noexcept(std::__invoke_r<long>(std::declval<F>(), 1)), "" );
+static_assert( noexcept(std::__invoke_r<void>(std::declval<F>(), 1, 2)), "" );
+static_assert( noexcept(std::__invoke_r<void*>(std::declval<F>(), 1, 2)), "" );
+static_assert( !noexcept(std::__invoke_r<D>(std::declval<F>(), 1, 2)), "" );

libstdc++-v3/testsuite/23_containers/unordered_set/allocator/ext_ptr.cc

@@ -15,7 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-do compile { target c++11 } }
+// { dg-do run { target c++11 } }
 
 #include <unordered_set>
 #include <memory>