putback
The function template putback
provides a uniform interface for putting back characters read from models of Peekable, for use in the definitions of Filters.
<boost/iostreams/operations.hpp>
<boost/iostreams/putback.hpp>
Attempt to putback a character to a given instance of the template parameter Peekable
, returning true
for success.
namespace boost { namespace iostreams { template<typename Peekable> bool putback(Peekable& peekable, typename char_type_of<Peekable>::type c); } } // End namespace boost::io
Peekable | - | A model of Peekable. |
The semantics of putback
depends on the category of Peekable
as follows:
category_of<Peekable>::type | semantics |
---|---|
convertible to istream_tag |
invokes peekable.rdbuf()->putback(c) and returns true if the operation was successful |
convertible to streambuf_tag but not to istream_tag |
invokes peekable.sputbackc(c) and returns true if the operation was successful |
convertible to peekable_tag but not to streambuf_tag or istream_tag |
returns peekable.putback(c) |
otherwise | compile-time error |
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© Copyright 2004-2007 Jonathan Turkanis
Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)