This fixes a 4.8 regression in std::mem_fn.
PR libstdc++/55908
* include/std/functional (_Mem_fn::operator()): Fix constraints to
avoid ambiguity.
* testsuite/20_util/function_objects/mem_fn/55908.cc: New.
* testsuite/20_util/bind/ref_neg.cc: Adjust dg-error line numbers.
Tested x86_64-linux, committed to trunk.
commit bb2e3a9896c0c3be894e5b926ea55ee12a8a2297
Author: Jonathan Wakely <jwakely....@gmail.com>
Date: Tue Jan 8 20:27:06 2013 +0000
PR libstdc++/55908
* include/std/functional (_Mem_fn::operator()): Fix constraints to
avoid ambiguity.
* testsuite/20_util/function_objects/mem_fn/55908.cc: New.
* testsuite/20_util/bind/ref_neg.cc: Adjust dg-error line numbers.
diff --git a/libstdc++-v3/include/std/functional
b/libstdc++-v3/include/std/functional
index 0b5d475..714b3ed 100644
--- a/libstdc++-v3/include/std/functional
+++ b/libstdc++-v3/include/std/functional
@@ -648,7 +648,7 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
template<typename _Tp, typename... _Args>
using _RequireValidArgs2
- = _Require<_NotSame<_Class, _Tp>, _NotSame<_Class*, _Tp>,
+ = _Require<_NotSame<_Class, _Tp>, _NotSame<const _Class*, _Tp>,
_AllConvertible<_Pack<_Args...>, _Pack<_ArgTypes...>>>;
template<typename _Tp, typename... _Args>
@@ -727,7 +727,7 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
template<typename _Tp, typename... _Args>
using _RequireValidArgs2
- = _Require<_NotSame<_Class, _Tp>, _NotSame<_Class*, _Tp>,
+ = _Require<_NotSame<_Class, _Tp>, _NotSame<volatile _Class*, _Tp>,
_AllConvertible<_Pack<_Args...>, _Pack<_ArgTypes...>>>;
template<typename _Tp, typename... _Args>
@@ -807,7 +807,8 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
template<typename _Tp, typename... _Args>
using _RequireValidArgs2
- = _Require<_NotSame<_Class, _Tp>, _NotSame<_Class*, _Tp>,
+ = _Require<_NotSame<_Class, _Tp>,
+ _NotSame<const volatile _Class*, _Tp>,
_AllConvertible<_Pack<_Args...>, _Pack<_ArgTypes...>>>;
template<typename _Tp, typename... _Args>
diff --git a/libstdc++-v3/testsuite/20_util/bind/ref_neg.cc
b/libstdc++-v3/testsuite/20_util/bind/ref_neg.cc
index 9854176..f65baa0 100644
--- a/libstdc++-v3/testsuite/20_util/bind/ref_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/bind/ref_neg.cc
@@ -30,10 +30,10 @@ void test01()
{
const int dummy = 0;
std::bind(&inc, _1)(0); // { dg-error "no match" }
- // { dg-error "rvalue|const" "" { target *-*-* } 1346 }
- // { dg-error "rvalue|const" "" { target *-*-* } 1360 }
- // { dg-error "rvalue|const" "" { target *-*-* } 1374 }
- // { dg-error "rvalue|const" "" { target *-*-* } 1388 }
+ // { dg-error "rvalue|const" "" { target *-*-* } 1347 }
+ // { dg-error "rvalue|const" "" { target *-*-* } 1361 }
+ // { dg-error "rvalue|const" "" { target *-*-* } 1375 }
+ // { dg-error "rvalue|const" "" { target *-*-* } 1389 }
std::bind(&inc, std::ref(dummy))(); // { dg-error "no match" }
}
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/55908.cc
b/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/55908.cc
new file mode 100644
index 0000000..7bbdb34
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/55908.cc
@@ -0,0 +1,34 @@
+// { dg-options "-std=gnu++11" }
+// { dg-do compile }
+
+// Copyright (C) 2013 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/>.
+
+// PR libstdc++/55908 calling const member function via const pointer
+
+#include <functional>
+
+struct foo
+{
+ void f(int) const { }
+
+ void g() const
+ {
+ auto mf = std::mem_fn(&foo::f);
+ mf(this, 1);
+ }
+};
