re PR libstdc++/39880 (Specialisation is_error_code_enum<errc> should not exist)

2009-04-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/39880
	PR libstdc++/39881
	PR libstdc++/39882
	* include/std/system_error (is_error_code_enum<errc>): Remove.
	(error_condition<>::error_condition(_ErrorCodeEnum,)
	error_condition<>::operator=(_ErrorCodeEnum)): Use make_error_condition.
	(error_code<>::error_code(_ErrorCodeEnum,),
	error_code<>::operator=(_ErrorCodeEnum)): Use make_error_code.
	* testsuite/19_diagnostics/system_error/39880.cc: New.
	* testsuite/19_diagnostics/error_condition/modifiers/39881.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/cons/39881.cc: Likewise.
	* testsuite/19_diagnostics/error_code/modifiers/39882.cc: Likewise.
	* testsuite/19_diagnostics/error_code/cons/39882.cc: Likewise.
	* testsuite/27_io/basic_ostream/inserters_other/char/error_code.cc:
	Adjust.
	* testsuite/27_io/basic_ostream/inserters_other/wchar_t/error_code.cc:
	Likewise.
	* testsuite/19_diagnostics/error_code/cons/1.cc: Likewise.
	* testsuite/19_diagnostics/error_code/operators/bool.cc: Likewise.
	* testsuite/19_diagnostics/error_code/operators/equal.cc: Likewise.
	* testsuite/19_diagnostics/error_code/operators/not_equal.cc:
	Likewise.
	* testsuite/19_diagnostics/error_category/cons/copy_neg.cc: Likewise.
	* testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
	* testsuite/19_diagnostics/system_error/what-4.cc: Likewise.
	* testsuite/30_threads/unique_lock/locking/2.cc: Likewise.

From-SVN: r146780

libstdc++-v3/include/std/system_error

@@ -51,10 +51,6 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
   template<typename _Tp>
     struct is_error_code_enum : public false_type { };
 
-  template<> 
-    struct is_error_code_enum<errc>
-    : public true_type { };
-
   /// is_error_condition_enum
   template<typename _Tp>
     struct is_error_condition_enum : public false_type { };
@@ -108,12 +104,14 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
   _GLIBCXX_CONST const error_category& system_category() throw ();
   _GLIBCXX_CONST const error_category& generic_category() throw ();
 
+  error_code make_error_code(errc);
+
   /// error_code
   // Implementation-specific error identification
   struct error_code
   {
     error_code()
-      : _M_value(0), _M_cat(&system_category()) { }
+    : _M_value(0), _M_cat(&system_category()) { }
 
     error_code(int __v, const error_category& __cat)
     : _M_value(__v), _M_cat(&__cat) { }
@@ -121,8 +119,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
     template<typename _ErrorCodeEnum>
       error_code(_ErrorCodeEnum __e,
       typename enable_if<is_error_code_enum<_ErrorCodeEnum>::value>::type* = 0)
-      : _M_value(static_cast<int>(__e)), _M_cat(&generic_category())
-      { }
+      { *this = make_error_code(__e); }
 
     void 
     assign(int __v, const error_category& __cat)
@@ -140,10 +137,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
       typename enable_if<is_error_code_enum<_ErrorCodeEnum>::value,
 			 error_code&>::type
       operator=(_ErrorCodeEnum __e)
-      {
-	assign(static_cast<int>(__e), generic_category());
-	return *this;
-      }
+      { return *this = make_error_code(__e); }
 
     int
     value() const { return _M_value; }
@@ -192,12 +186,14 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
     { return (__os << __e.category().name() << ':' << __e.value()); }
 
+  error_condition make_error_condition(errc);
 
   /// error_condition
   // Portable error identification
   struct error_condition 
   {
-    error_condition() : _M_value(0), _M_cat(&generic_category()) { }
+    error_condition()
+    : _M_value(0), _M_cat(&generic_category()) { }
 
     error_condition(int __v, const error_category& __cat)     
     : _M_value(__v), _M_cat(&__cat) { }
@@ -206,7 +202,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
       error_condition(_ErrorConditionEnum __e,
 		      typename enable_if<is_error_condition_enum
 		                      <_ErrorConditionEnum>::value>::type* = 0)
-	: _M_value(static_cast<int>(__e)), _M_cat(&generic_category()) { }
+      { *this = make_error_condition(__e); }
 
     void
     assign(int __v, const error_category& __cat)
@@ -220,10 +216,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
       typename enable_if<is_error_condition_enum
 			 <_ErrorConditionEnum>::value, error_condition&>::type
       operator=(_ErrorConditionEnum __e)
-      {
-	assign(static_cast<int>(__e), generic_category());
-	return *this;
-      }
+      { return *this = make_error_condition(__e); }
 
     void 
     clear()

libstdc++-v3/testsuite/19_diagnostics/error_category/cons/copy_neg.cc

@@ -32,7 +32,7 @@ int main()
   return 0;
 }
 
-// { dg-error "deleted function" "" { target *-*-* } 76 }
+// { dg-error "deleted function" "" { target *-*-* } 72 }
 // { dg-error "used here" "" { target *-*-* } 31 }
 // { dg-error "first required here" "" { target *-*-* } 30 }
 // { dg-excess-errors "copy constructor" }

libstdc++-v3/testsuite/19_diagnostics/error_code/cons/1.cc

@@ -37,7 +37,7 @@ int main()
   VERIFY( e2.category() == cat );
 
   // 3
-  std::error_code e3(std::errc::operation_not_supported);
+  std::error_code e3(std::make_error_code(std::errc::operation_not_supported));
   VERIFY( e3.value() == int(std::errc::operation_not_supported) );
   VERIFY( e3.category() == std::generic_category() );
 

libstdc++-v3/testsuite/19_diagnostics/error_code/cons/39882.cc

+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2009 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/>.
+
+#include <system_error>
+#include <testsuite_hooks.h>
+
+enum my_errc { my_err = 0 };
+
+class my_error_category_impl
+: public std::error_category
+{
+public:
+  const char* name() const { return ""; }
+  std::string message(int) const { return ""; }
+} my_error_category_instance;
+
+std::error_code
+make_error_code(my_errc e)
+{
+  return std::error_code(static_cast<int>(e),
+			 my_error_category_instance);
+}
+
+namespace std
+{
+  template<>
+    struct is_error_code_enum<my_errc>
+    : public true_type {};
+}
+
+// libstdc++/39882
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::error_code ec1(my_err);
+  VERIFY( ec1 == make_error_code(my_err) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}

libstdc++-v3/testsuite/19_diagnostics/error_code/modifiers/39882.cc

+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2009 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/>.
+
+#include <system_error>
+#include <testsuite_hooks.h>
+
+enum my_errc { my_err = 0 };
+
+class my_error_category_impl
+: public std::error_category
+{
+public:
+  const char* name() const { return ""; }
+  std::string message(int) const { return ""; }
+} my_error_category_instance;
+
+std::error_code
+make_error_code(my_errc e)
+{
+  return std::error_code(static_cast<int>(e),
+			 my_error_category_instance);
+}
+
+namespace std
+{
+  template<>
+    struct is_error_code_enum<my_errc>
+    : public true_type {};
+}
+
+// libstdc++/39882
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::error_code ec2;
+  ec2 = my_err;
+  VERIFY( ec2 == make_error_code(my_err) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}

libstdc++-v3/testsuite/19_diagnostics/error_code/operators/bool.cc

@@ -34,7 +34,7 @@ int main()
     }
 
   // 2
-  std::error_code e2(std::errc::operation_not_supported);
+  std::error_code e2(std::make_error_code(std::errc::operation_not_supported));
   if (e2)
     {
       VERIFY( true );

libstdc++-v3/testsuite/19_diagnostics/error_code/operators/equal.cc

@@ -27,7 +27,7 @@ int main()
   bool test __attribute__((unused)) = true;
 
   std::error_code e1;
-  std::error_code e2(std::errc::operation_not_supported);
+  std::error_code e2(std::make_error_code(std::errc::operation_not_supported));
 
   VERIFY( e1 == e1 );
   VERIFY( !(e1 == e2) );

libstdc++-v3/testsuite/19_diagnostics/error_code/operators/not_equal.cc

@@ -27,7 +27,7 @@ int main()
   bool test __attribute__((unused)) = true;
 
   std::error_code e1;
-  std::error_code e2(std::errc::operation_not_supported);
+  std::error_code e2(std::make_error_code(std::errc::operation_not_supported));
 
   VERIFY( !(e1 != e1) );
   VERIFY( e1 != e2 );

libstdc++-v3/testsuite/19_diagnostics/error_condition/cons/39881.cc

+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2009 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/>.
+
+#include <system_error>
+#include <testsuite_hooks.h>
+
+enum my_errc { my_err = 0 };
+
+class my_error_category_impl
+: public std::error_category
+{
+public:
+  const char* name() const { return ""; }
+  std::string message(int) const { return ""; }
+} my_error_category_instance;
+
+std::error_condition
+make_error_condition(my_errc e)
+{
+  return std::error_condition(static_cast<int>(e),
+			      my_error_category_instance);
+}
+
+namespace std
+{
+  template<>
+    struct is_error_condition_enum<my_errc>
+    : public true_type { };
+}
+
+// libstdc++/39881
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::error_condition ec1(my_err);
+  VERIFY( ec1 == make_error_condition(my_err) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}

libstdc++-v3/testsuite/19_diagnostics/error_condition/modifiers/39881.cc

+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2009 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/>.
+
+#include <system_error>
+#include <testsuite_hooks.h>
+
+enum my_errc { my_err = 0 };
+
+class my_error_category_impl
+: public std::error_category
+{
+public:
+  const char* name() const { return ""; }
+  std::string message(int) const { return ""; }
+} my_error_category_instance;
+
+std::error_condition
+make_error_condition(my_errc e)
+{
+  return std::error_condition(static_cast<int>(e),
+			      my_error_category_instance);
+}
+
+namespace std
+{
+  template<>
+    struct is_error_condition_enum<my_errc>
+    : public true_type { };
+}
+
+// libstdc++/39881
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::error_condition ec2;
+  ec2 = my_err;
+  VERIFY( ec2 == make_error_condition(my_err) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}

libstdc++-v3/testsuite/19_diagnostics/system_error/39880.cc

+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2009 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/>.
+
+#include <system_error>
+
+// libstdc++/39880
+void test01()
+{
+  std::error_code ec;
+  if (ec == std::errc::not_supported)
+    { }
+}

libstdc++-v3/testsuite/19_diagnostics/system_error/cons-1.cc

@@ -26,7 +26,8 @@ int main()
 {
   bool test __attribute__((unused)) = true;
   const std::string s("too late: boulangerie out of pain au raisin");
-  const std::error_code e(std::errc::operation_not_supported);
+  const std::error_code
+    e(std::make_error_code(std::errc::operation_not_supported));
 
   // 1
   {

libstdc++-v3/testsuite/19_diagnostics/system_error/what-4.cc

@@ -31,7 +31,8 @@ void test01()
   bool test __attribute__((unused)) = true;
   std::string s("after nine thirty, this request cannot be met");
 
-  std::system_error obj = std::system_error(std::errc::invalid_argument, s);
+  std::system_error obj =
+    std::system_error(std::make_error_code(std::errc::invalid_argument), s);
   std::string s1(obj.what());
   std::string s2(obj.what());
   VERIFY( s1 == s2 );

libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/char/error_code.cc

@@ -32,7 +32,7 @@ void test()
 
   char buf[64];
   error_code e1;
-  error_code e2(errc::bad_address);
+  error_code e2(make_error_code(errc::bad_address));
   string s, s1, s2;
 
   {

libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/wchar_t/error_code.cc

 // { dg-options "-std=gnu++0x" }
 
-// Copyright (C) 2007, 2009 Free Software Foundation
+// Copyright (C) 2007, 2008, 2009 Free Software Foundation
 //
 // 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
@@ -32,7 +32,7 @@ void test()
 
   wchar_t buf[64];
   error_code e1;
-  error_code e2(errc::bad_address);
+  error_code e2(make_error_code(errc::bad_address));
   wstring s, s1, s2;
 
   {

libstdc++-v3/testsuite/30_threads/unique_lock/locking/2.cc

@@ -44,7 +44,8 @@ void test01()
         }
       catch (const std::system_error& ex)
         {
-	  VERIFY( ex.code() == std::error_code(std::errc::operation_not_permitted) );
+	  VERIFY( ex.code() == std::make_error_code
+		  (std::errc::operation_not_permitted) );
         }
       catch (...)
         {
@@ -80,8 +81,8 @@ void test02()
 	}
       catch (const std::system_error& ex)
 	{
-	  VERIFY( ex.code() == std::error_code(
-		    std::errc::resource_deadlock_would_occur) );
+	  VERIFY( ex.code() == std::make_error_code
+		  (std::errc::resource_deadlock_would_occur) );
 	}
       catch (...)
 	{