re PR libstdc++/9562 (ostream::sentry::operator bool () should be const)

2003-02-06  Paolo Carlini  <pcarlini@unitus.it>

	PR libstdc++/9562
	* include/std/std_istream.h
	(basic_istream::sentry::operator bool()): Make const.
	* include/std/std_ostream.h
	(basic_ostream::sentry::operator bool()): Likewise.
	* testsuite/27_io/istream_sentry.cc (test03): Add.
	* testsuite/27_io/ostream_sentry.cc: Add.

From-SVN: r62508

libstdc++-v3/ChangeLog

@@ -1,3 +1,13 @@
+2003-02-06  Paolo Carlini  <pcarlini@unitus.it>
+
+	PR libstdc++/9562
+	* include/std/std_istream.h
+	(basic_istream::sentry::operator bool()): Make const.
+	* include/std/std_ostream.h
+	(basic_ostream::sentry::operator bool()): Likewise.
+	* testsuite/27_io/istream_sentry.cc (test03): Add.
+	* testsuite/27_io/ostream_sentry.cc: Add.
+
 2003-02-06  Paolo Carlini  <pcarlini@unitus.it>
 
 	PR libstdc++/9548

libstdc++-v3/include/std/std_istream.h

@@ -620,7 +620,7 @@ namespace std
        *  For ease of use, sentries may be converted to booleans.  The
        *  return value is that of the sentry state (true == okay).
       */
-      operator bool() { return _M_ok; }
+      operator bool() const { return _M_ok; }
 
     private:
       bool _M_ok;

libstdc++-v3/include/std/std_ostream.h

@@ -394,7 +394,7 @@ namespace std
        *  For ease of use, sentries may be converted to booleans.  The
        *  return value is that of the sentry state (true == okay).
       */
-      operator bool() 
+      operator bool() const
       { return _M_ok; }
     };
 

libstdc++-v3/testsuite/27_io/istream_sentry.cc

@@ -65,7 +65,7 @@ test02()
 {
   using namespace std;
   istringstream in("80.21 56.89 12.3");
-  bool  test = true;
+  bool test = true;
   int i = 0;
   double x;
 
@@ -79,9 +79,23 @@ test02()
   VERIFY( i == 3 );
 }    
 
+// libstdc++/9562
+void
+test03()
+{
+  bool test = true;
+
+  std::stringbuf strbuf01;
+  std::istream strm1(&strbuf01);
+  const std::istream::sentry sentry1(strm1);
+
+  VERIFY( bool(sentry1) == false );
+}
+
 int main() 
 {
   test01();
   test02();
+  test03();
   return 0;
 }

libstdc++-v3/testsuite/27_io/ostream_sentry.cc

@@ -0,0 +1,53 @@
+// 2003-02-06  Paolo Carlini  <pcarlini@unitus.it>
+
+// Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+// 27.6.2.3 class basic_ostream::sentry
+
+#include <ostream>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/9562
+void
+test01()
+{
+  bool test = true;
+
+  std::stringbuf strbuf01;
+  std::ostream strm1(&strbuf01);
+  const std::ostream::sentry sentry1(strm1);
+
+  VERIFY( bool(sentry1) == true );
+}
+
+int main() 
+{
+  test01();
+  return 0;
+}