2004-06-22 Paolo Carlini <pcarlini@suse.de>

	* include/std/std_istream.h (ignore(streamsize __n = 1,
	int_type __delim = traits_type::eof())): Split into...
	(ignore(), ignore(streamsize __n), ignore(streamsize __n,
	int_type __delim)): The first two can be much more simpler
	and efficient than the fully general case; also, the last
	two can take advantage of the same mechanism already used
	for getline.
	* include/bits/istream.tcc (ignore(streamsize __n = 1,
	int_type __delim = traits_type::eof()): Remove.
	(ignore(), ignore(streamsize __n), ignore(streamsize __n,
	int_type __delim)): New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@83486 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 2 deletions

diff --git a/libstdc++-v3/include/std/std_istream.h b/libstdc++-v3/include/std/std_istream.h
index a3a53ba73f6..65f9e6c3034 100644
--- a/libstdc++-v3/include/std/std_istream.h
+++ b/libstdc++-v3/include/std/std_istream.h
@@ -1,6 +1,6 @@
 // Input streams -*- C++ -*-
 
-// Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003
+// Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003, 2004
 // Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
@@ -412,9 +412,20 @@ namespace std
        *  - the next character equals @a delim (in this case, the character
        *    is extracted); note that this condition will never occur if
        *    @a delim equals @c traits::eof().
+       *
+       *  NB: Provide three overloads, instead of the single function
+       *  (with defaults) mandated by the Standard: this leads to a
+       *  better performing implementation, while still conforming to
+       *  the Standard.
       */
       __istream_type& 
-      ignore(streamsize __n = 1, int_type __delim = traits_type::eof());
+      ignore();
+
+      __istream_type& 
+      ignore(streamsize __n);
+
+      __istream_type& 
+      ignore(streamsize __n, int_type __delim);
       
       /**
        *  @brief  Looking ahead in the stream