April 2022 - Boost-users - lists.preview.boost.org

Reading a large compressed .gz file without uncompressing it
by bharath pagadala 05 Apr '22

05 Apr '22

Hi Team, My requirement is I want a read a large .gz file and stream data without uncompressing it. Does the boost library help me to achieve this. Is there any function in the boost library which help me stream data directly without uncompressing the input .gz file. Please respond on this thank you in advance. Cheers, Bharat Pagadala

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The Boost Statechart Library AND boost::bind
by Jinlong Shen 05 Apr '22

05 Apr '22

Can the statechart library be updated to treat the boost::bind warning about namespace. See here for details. https://stackoverflow.com/questions/53203970/why-boostbind-insists-pulling-…

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[Nowide] Nowide and Property Tree file IO
by William Kappler 03 Apr '22

03 Apr '22

I'm trying to sidestep some issues with unicode filenames on Windows (MSYS64) using Boost.Nowide. Specifically, my program operates in UTF-8, and providing that to std/Boost functions yields incorrect filenames due to them being interpreted as UTF-16 (or something along those lines). However, the primary functions I have issues with are from Boost.PropertyTree. Specifically, read_json and write_json. These functions don't seem to be Nowide-friendly. I tried just calling boost::nowide::nowide_filesystem() before my json calls, hoping it would work; it did not, I got the same mangled filenames. My next thought was to see if a nowide stream could be substituted into the stream-taking variants of read_json/write_json; it cannot be, they aren't compatible. The only option that seems to leave is something along these lines: https://stackoverflow.com/a/21537818, but using Nowide to read in the file. That adds a lot of steps (and possibly memory usage). It feels like I'm missing something. Any suggestions would be appreciated. Thanks in advance. :-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:- *William E. Kappler II* Software Designer and Programmer william-kappler.com

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boost python AttributeError
by Chien-Yu Chen 03 Apr '22

03 Apr '22

hi I followed the basic boost python examples, both hello_ext.greet() and hello.World() and both are giving me AttributeError error, like AttributeError: module `hello` has no attribute 'greet' dumpbin does show that I have PyInit_hello exported out. Please let me know if I am doing something wrong as this should be trivial. thx -- Any MicroSoft extension file will directly go to trash without any warning and regret.

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