Make std::mem_fn work with varargs functions.

	* include/std/functional (_Mem_fn_traits): Add partial specializations
	for varargs functions.
	(_Mem_fn_base): Do not check arguments are convertible for varargs.
	(_Bind_check_arity): Add partial specializations for varargs functions.
	* include/std/type_traits (__bool_constant): Add alias template.
	* testsuite/20_util/bind/ref_neg.cc: Adjust dg-error.
	* testsuite/20_util/bind/refqual.cc: New, test ref-qualifiers.
	* testsuite/20_util/declval/requirements/1_neg.cc: Adjust dg-error.
	* testsuite/20_util/function_objects/mem_fn/refqual.cc: Test varargs.
	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Adjust
	dg-error.
	* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc: Adjust
	dg-error.

From-SVN: r217393

libstdc++-v3/ChangeLog

+2014-11-11  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/std/functional (_Mem_fn_traits): Add partial specializations
+	for varargs functions.
+	(_Mem_fn_base): Do not check arguments are convertible for varargs.
+	(_Bind_check_arity): Add partial specializations for varargs functions.
+	* include/std/type_traits (__bool_constant): Add alias template.
+	* testsuite/20_util/bind/ref_neg.cc: Adjust dg-error.
+	* testsuite/20_util/bind/refqual.cc: New, test ref-qualifiers.
+	* testsuite/20_util/declval/requirements/1_neg.cc: Adjust dg-error.
+	* testsuite/20_util/function_objects/mem_fn/refqual.cc: Test varargs.
+	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Adjust
+	dg-error.
+	* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc: Adjust
+	dg-error.
+
 2014-11-11  Siva Chandra Reddy  <sivachandra@google.com>
 
 	* testsuite/libstdc++-xmethods/associative-containers.cc: Add new

libstdc++-v3/include/std/type_traits

@@ -89,6 +89,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// The type used as a compile-time boolean with false value.
   typedef integral_constant<bool, false>    false_type;
 
+  template<bool __v>
+    using __bool_constant = integral_constant<bool, __v>;
+
   // Meta programming helper types.
 
   template<bool, typename, typename>

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 *-*-* } 1207 }
-  // { dg-error "rvalue|const" "" { target *-*-* } 1221 }
-  // { dg-error "rvalue|const" "" { target *-*-* } 1235 }
-  // { dg-error "rvalue|const" "" { target *-*-* } 1249 }
+  // { dg-error "rvalue|const" "" { target *-*-* } 1126 }
+  // { dg-error "rvalue|const" "" { target *-*-* } 1140 }
+  // { dg-error "rvalue|const" "" { target *-*-* } 1154 }
+  // { dg-error "rvalue|const" "" { target *-*-* } 1168 }
   std::bind(&inc, std::ref(dummy))();	// { dg-error  "no match" }
 }
 

libstdc++-v3/testsuite/20_util/bind/refqual.cc

+// Copyright (C) 2014 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++11" }
+
+#include <functional>
+#include <testsuite_hooks.h>
+
+struct X
+{
+  int f() const& { return 0; }
+  int g(int i, ...)& { return i; }
+};
+
+void
+test01()
+{
+  X x;
+  auto b = std::bind(&X::f, &x);
+  VERIFY( b() == 0 );
+  auto bb = std::bind(&X::g, &x, 1, 2);
+  VERIFY( bb() == 1 );
+}
+
+int
+main()
+{
+  test01();
+}

libstdc++-v3/testsuite/20_util/declval/requirements/1_neg.cc

@@ -19,7 +19,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-error "static assertion failed" "" { target *-*-* } 2201 }
+// { dg-error "static assertion failed" "" { target *-*-* } 2204 }
 
 #include <utility>
 

libstdc++-v3/testsuite/20_util/function_objects/mem_fn/refqual.cc

@@ -24,6 +24,7 @@ struct Foo
 {
   void r()&& { }
   int l() const& { return 0; }
+  void lv(int, ...)& { }
 };
 
 void test01()
@@ -31,4 +32,5 @@ void test01()
   Foo f;
   int i = std::mem_fn(&Foo::l)( f );
   std::mem_fn(&Foo::r)( std::move(f) );
+  std::mem_fn(&Foo::lv)( f, 1, 2, 3 );
 }

libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs_neg.cc

@@ -48,5 +48,5 @@ void test01()
 // { dg-error "required from here" "" { target *-*-* } 40 }
 // { dg-error "required from here" "" { target *-*-* } 42 }
 
-// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1866 }
-// { dg-error "declaration of" "" { target *-*-* } 1830 }
+// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1869 }
+// { dg-error "declaration of" "" { target *-*-* } 1833 }

libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc

@@ -48,5 +48,5 @@ void test01()
 // { dg-error "required from here" "" { target *-*-* } 40 }
 // { dg-error "required from here" "" { target *-*-* } 42 }
 
-// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1754 }
-// { dg-error "declaration of" "" { target *-*-* } 1718 }
+// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1757 }
+// { dg-error "declaration of" "" { target *-*-* } 1721 }