filtering_stream not reaching the Sink at the end of the chain?cout but not with another ostream?operator| is ambiguous?finite_state_filter examples?filtering_stream not reaching the Sink at the end of the chain?
You may need to flush the stream. Note, however, that there is no guarantee that all data written to a filtering_stream will be forwarded to the final Sink until the stream is closed, unless all the Filters in the underlying chain are Closable.
It's also possible that a buggy Filter is modifying data in a way you don't expect.
cout but not with another ostream?The Iostreams library stores streams and stream buffers by reference; consequently, streams and stream buffers must outlive any filter chain to which they are added. This is not a problem for std::cout, since it is guaranteed to live until the end of the program.
Check to make sure that the ostream is not being destroyed before the filtering_stream. If both objects are constructed on the stack within the same block, make sure that the ostream is constructed first.
Use a tee_filter or tee_device. See tee.
operator| is ambiguous?
During overload resolution for an expression involving operator|, your compiler could be considering an implicit conversion from an intergral type to a Pipable Filter. Make sure that all your Pipable Filters have explicit constructors. See Pipelines.
finite_state_filter examples?
The template finite_state_filter requires a highly standard-conforming compiler. See Portability and the Compiler Status Tables for details.
Revised 20 May, 2004
© Copyright Jonathan Turkanis, 2004
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)