std_fstream.h (class basic_ifstream, [...]): Add const overloads of is_open, as per DR 365 [WP].

2004-08-13  Paolo Carlini  <pcarlini@suse.de>

	* include/std/std_fstream.h (class basic_ifstream,
	class basic_ofstream, class basic_fstream): Add const overloads
	of is_open, as per DR 365 [WP].
	* docs/html/ext/howto.html: Add an entry for DR 365.

From-SVN: r85948

libstdc++-v3/ChangeLog

+2004-08-13  Paolo Carlini  <pcarlini@suse.de>
+
+	* include/std/std_fstream.h (class basic_ifstream,
+	class basic_ofstream, class basic_fstream): Add const overloads
+	of is_open, as per DR 365 [WP].
+	* docs/html/ext/howto.html: Add an entry for DR 365.
+
 2004-08-12  Paolo Carlini  <pcarlini@suse.de>
 
 	* configure.ac: Specify version 1.8.5 in AM_INIT_AUTOMAKE.

libstdc++-v3/docs/html/ext/howto.html

@@ -479,6 +479,12 @@
     <dd>Change the format string to &quot;%.0Lf&quot;.
     </dd>
 
+    <dt><a href="lwg-defects.html#365">365</a>:
+        <em>Lack of const-qualification in clause 27</em>
+    </dt>
+    <dd>Add const overloads of <code>is_open</code>.
+    </dd>
+
     <dt><a href="lwg-defects.html#389">389</a>:
         <em>Const overload of valarray::operator[] returns by value</em>
     </dt>

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

 // File based streams -*- C++ -*-
 
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
 // Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
@@ -282,7 +282,8 @@ namespace std
        *  @brief  Returns true if the external file is open.
       */
       bool
-      is_open() const throw() { return _M_file.is_open(); }
+      is_open() const throw()
+      { return _M_file.is_open(); }
 
       /**
        *  @brief  Opens an external file.
@@ -569,7 +570,14 @@ namespace std
        *  @return  @c rdbuf()->is_open()
       */
       bool
-      is_open() { return _M_filebuf.is_open(); }
+      is_open()
+      { return _M_filebuf.is_open(); }
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 365. Lack of const-qualification in clause 27
+      bool
+      is_open() const
+      { return _M_filebuf.is_open(); }
 
       /**
        *  @brief  Opens an external file.
@@ -693,7 +701,14 @@ namespace std
        *  @return  @c rdbuf()->is_open()
       */
       bool
-      is_open() { return _M_filebuf.is_open(); }
+      is_open()
+      { return _M_filebuf.is_open(); }
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 365. Lack of const-qualification in clause 27
+      bool
+      is_open() const
+      { return _M_filebuf.is_open(); }
 
       /**
        *  @brief  Opens an external file.
@@ -817,7 +832,14 @@ namespace std
        *  @return  @c rdbuf()->is_open()
       */
       bool
-      is_open() { return _M_filebuf.is_open(); }
+      is_open()
+      { return _M_filebuf.is_open(); }
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 365. Lack of const-qualification in clause 27
+      bool
+      is_open() const
+      { return _M_filebuf.is_open(); }
 
       /**
        *  @brief  Opens an external file.