Re: [boost] Re: Interest in library generating streambufs fromobjects
Larry Evans wrote: [snip] Any comments? Maybe this method could be used Yeah. What happens when ostream destructor is called. Since this probably calls the streambuf destructor, and if the streambuf is actually a fwd_streambuf, and the ~fwd_streambuf resets the ostream.rdbuf, this just may be a problem :(. IOW, OOPS. ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] Re: Interest in library generating streambufs fromobjects
Larry Evans wrote: [snip] The prototype of the "using overflow+sputc" method is in files/col_io/test_fwd_streambuf.zip. A more complete marg_ostream example is in files/col_io/test_marg_ostreambuf.zip. It shows how an ostream indentation can be changed without resorting to a wrapper class like marg_ostream in col_io/col_io.zip. It also shows how to change the indentation with use of dynamic_cast and call to marg_ostreambuf member function. It also shows how the original status of the ostream can be restored by simply deleting the result of ostream::rdbuf. Any comments? Maybe this method could be used with Maxim's adaptors? ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] Re: Interest in library generating streambufs fromobjects
Larry Evans wrote: [snip] with buffered input. After thinking some more, I thought about just using overflow and sputc to "pipe" the output to the next streambuf. This greatly simplified the code. Would something similar work with [snip] The prototype of the "using overflow+sputc" method is in files/col_io/test_fwd_streambuf.zip. ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] Re: Interest in library generating streambufs fromobjects
Maxim Egorushkin wrote: [snip] I posted here a while ago streambuf adapters. There was no any answer. May be you might find it intresting. Sorry I overlooked it. The main idea is simple: to present any linear sequence as std::basic_streambuf<>. It sounds like what people, in particular Robert Ramey , wants. Here are the file. I had a brief look and it looks promising. However, I'm wondering if some of the complexity can be avoided. I had a hard time figuring out just how to get marg_ostreambuf in files/col_io/col_io.zip to work with buffered input. After thinking some more, I thought about just using overflow and sputc to "pipe" the output to the next streambuf. This greatly simplified the code. Would something similar work with your code. In particular, can you create an equivalent to marg_ostream from files/col_io/col_io.zip by using your, I guess, stream buffer redirectors? I'd like to see that. Maybe Reece Dunn would also since he's "interested in indentation facilities." ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] RE: Interest in library generating streambufs fromobjects
> Thanks for your interest. I have posted the library at > http://groups.yahoo.com/group/boost/files/streambuf_lib/. > Wow! I have not had too much time, but by the looks of it, it's great! I'm sure interested in this! Best, John ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] RE: Interest in library generating streambufs fromobjects
Larry Evans wrote: [snip] I hadn't thought of the "adaptable sequence" idea, but the "composition of streambufs" idea sounds similar to the marg_ostreambuf in files/col_io. The marg_ostreambuf::CTOR takes a streambuf and its member functions forward to that after doing some processing via the marg_buffer_put superclass. Maybe marg_buffer_put is a "sort-of" "adaptable sequence". Anyway, it might give you some ideas. Maybe a modification to double_streambuf or bi_directional_streambuf could be used simlar to pipes in unix. Another template parameter, e.g. one named "Xform", would contain the code to do any transformations on the characters. For example, if Xform=marg_buffer_put, then this would create marg_ostreambuf. This could be the input stream to another such buffer, thus forming the next link in the pipe of streambufs. Does this make sense? ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Re: [boost] RE: Interest in library generating streambufs fromobjects
Jonathan D. Turkanis wrote: Thanks for your interest. I have posted the library at http://groups.yahoo.com/group/boost/files/streambuf_lib/. [snip] Robert Ramey wrote: [snip] out of streambuf and a streambuf built that can use any "adaptable sequence". This is good idea! I had thought about composing streambufs to create new streambufs, and indeed this seems fairly straightforward using my approach (perhaps the most difficult part is selecting suitable names for the composition operations -- how about 'operator+' ?) I hadn't thought of the "adaptable sequence" idea, but the "composition of streambufs" idea sounds similar to the marg_ostreambuf in files/col_io. The marg_ostreambuf::CTOR takes a streambuf and its member functions forward to that after doing some processing via the marg_buffer_put superclass. Maybe marg_buffer_put is a "sort-of" "adaptable sequence". Anyway, it might give you some ideas. ___ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
