[boost] [iostreams] array and gzip_decompressor

Subject: [boost] [iostreams] array and gzip_decompressor
From: Nikolay Mladenov (nikolay.mladenov_at_[hidden])
Date: 2010-02-24 01:48:50

Recently I came back to a source written some time ago, that was
running then but it is not compiling now.

the failing snippet is:

                typedef boost::iostreams::composite<boost::iostreams::gzip_decompressor,
boost::iostreams::array_source>
                        array_gzip_decompressor;

                boost::iostreams::gzip_decompressor filter;
                boost::iostreams::array_source source(&_storage[0], _storage.size());
                array_gzip_decompressor dev(filter,source);
                boost::iostreams::stream_buffer<array_gzip_decompressor> ibuf(dev);

the error is:

> boost\iostreams\read.hpp(191) : error C2039: 'putback' : is not a member of 'boost::iostreams::detail::direct_adapter<Direct>'
> with [ Direct=boost::iostreams::array_source ]

It seems to me that gzip_decompressor requires peekable source, but
array_source is not peekable.

Is there another way I should be creating gzipped stream into memory?
Or maybe the arrays could be made peekable?

Thanks in advance,

Nikolay Mladenov