February 2020 - Boost - lists.preview.boost.org

Boost geometry
by Shiko 13 Feb '20

13 Feb '20

Hello everyone. My name is Ahmed ElShreif and I'm a newcomer to the Boost community. I am willing to apply this year in GSoC with boost. I was accepted in LibreOffice in GSoC'19. I read the Projects and it's really interesting for me. But I have some questions: why this projects exist also in 2019 potential projects? Can I get help in finding some easy issues to solve now to get familiar with the library more and become ready more for the project? Thanks Ahmed ElShreif -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Dev-f2600599.html

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Boost.Astronomy
by Eslam Tarek 13 Feb '20

13 Feb '20

Hello everyone. My name is Eslam Tarek and I'm a newcomer to the Boost community. I am willing to apply this year in GSoC with boost, But Ihave some questions: why this projects exist also in 2019 potential projects? Can I get help in finding some easy issues to solve now to get familiar with the library more and become ready more for the project? Regards, Eslam Tarek -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Dev-f2600599.html

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Boost.Astronomy
by Eslam Tarek 12 Feb '20

12 Feb '20

Hello everyone. My name is Eslam Tarek and I'm a newcomer to the Boost community. I am willing to apply this year in GSoC with boost, I read the Projects and it's really interesting for me. But I have some questions: why this projects exist also in 2019 potential projects? Can I get help in finding some easy issues to solve now to get familiar with the library more and become ready more for the project? Regards, Eslam Tarek -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Dev-f2600599.html

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If one specifies a cxxstd-dialect, one must also specify the cxxstd
by pbristow＠hetp.u-net.com 12 Feb '20

12 Feb '20

https://boostorg.github.io/build/manual/develop/index.html#bbv2.overview.bu… s.features says 5.3. Builtin features cxxstd Allowed values: 98, 03, 0x, 11, 1y, 14, 1z, 17, 2a, latest. cxxstd-dialect Allowed values: iso, gnu, ms. So these work as expected toolset=gcc cxxstd=2a cxxstd-dialect=gnu is OK toolset=gcc-9.2.0 cxxstd=2a cxxstd-dialect=gnu is OK too But if I do NOT specify the cxxstd version - just toolset=gcc cxxstd-dialect=gnu for example: boost\libs\multiprecision\example>b2 float128_snips toolset=gcc-8.1.0 cxxstd-dialect=gnu address-model=64 release > .mp_float128_snips_gcc810_14_gnu.log Iboost/tools/build/src/build\feature.jam:1020: in feature.compress-subproperties from module feature error: assertion failure: [ set.equal "<cxxstd-dialect>gnu" "<toolset-gcc:version>8.1.0" : "<toolset-gcc:version>8.1.0" ] error: Expected: [ "true" ] error: Got: [ ] which had be puzzled for a while. Probably the even more common case of only having one compiler, say gcc, installed, and so not specifying toolset at all, confusingly behaves the same way? This is a perfectly reasonable behaviour, but this requirement might helpfully be documented. Or this more subtle than I understand? Thanks Paul

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[docs] Eclipse Foundation standardising AsciiDoc
by Mateusz Loskot 12 Feb '20

12 Feb '20

FYI ---------- Forwarded message --------- From: Mateusz Loskot <mateusz(a)loskot.net> Date: Wed, 12 Feb 2020 at 09:21 Subject: Eclipse Foundation standardising AsciiDoc To: <boost-docs(a)lists.boost.org> Hi, Number of Boost libraries/tools use AsciiDoc as preferred documentation format, so I think this initiative may be of interest here https://www.eclipse.org/lists/asciidoc-wg/msg00001.html https://www.eclipse.org/lists/asciidoc-wg/msg00002.html Best regards, -- Mateusz Loskot, http://mateusz.loskot.net

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[Boost.Real] Base Change Not Incorporated in Initializer List Constructors
by Jai . 12 Feb '20

12 Feb '20

The base change done during GSoC 2019 seems to have not been incorporated in the initializer list constructors, thus giving incorrect results. Regards, Jai

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No release in calendar for 2020?
by Mateusz Loskot 10 Feb '20

10 Feb '20

Hi, Am I seeing it right that nothing has been scheduled for 2020 at https://www.boost.org/development/index.html or is there a problem with the calendar (or my browser)? What is the schedule of the Boost 1.73.0 ? Best regards, -- Mateusz Loskot, http://mateusz.loskot.net

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GSoC 2020 application
by David Bellot 10 Feb '20

10 Feb '20

Hi Boost community, just to let you know that our application to Google Summer of Code 2020 has been submitted. Let's hope for the best now. To all potential mentors, please keep adding projects if you are willing to participate. It's a great program with great benefits for our Boost community. Best regards, David

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[Boost Real] GSoC 2020 - Introduction
by Chirag Thakur 10 Feb '20

10 Feb '20

Hi everyone. My name is Chirag Thakur and I'm a newcomer to the Boost community. I want to contribute to Boost.Real. I have been an active participator in programming contests like ACM-ICPC and other online judges over the last two years and have good proficiency in C++. I want to get involved using Google Summer of Code 2020. How can I start? Regards Chirag Thakur

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[Boost Graph Library] Possible succint data structure addition
by Joana Modesto Hrotko 09 Feb '20

09 Feb '20

Dear Boost community, I am a Master's student and currently working on my Master thesis. My Master Thesis consists in implementing the k2-tree data structure in C++ and one of the additional proposals for my thesis would be to integrate my code with the boost graph library.I believe this integration would bring great value to the boost library and also it would provide a better validation for my work. So my question is if this would be something of interest for the library to integrate with boost graph library. INFO ABOUT K2-TREE: The k2-tree have been proved successful to represent in a very compact way different kinds of binary relations, such as web graphs, RDFs or raster data. Binary relations can be an abstraction to represent the relation between the objects of two collections of different nature: graphs, trees, strings, among others. They can be used in several low-level structures within a more complex information retrieval system, or even replace one of the most used one: an inverted index can be regarded as a binary relation between the vocabulary of terms and the documents where they appear. Moreover, it can represent the relation between terms and web pages, or even social networks or the connection between the web pages in the Web, which is normally represented as a web graph. k2-trees have been also used in other scenarios, such as geographical and RDF data, or images. Brisaboa, Nieves R., et al. "Compressed representation of dynamic binary relations with applications." Information Systems 69 (2017): 106-123. Coimbra, Miguel E., et al. "On dynamic succinct graph representations." arXiv preprint arXiv:1911.03195 (2019). Thank you in advance for your attention Best regards, Joana Hrotkó

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[graph] State of the README
by Mateusz Loskot 09 Feb '20

09 Feb '20

Hi, Today's post [1] about feature suggestion for the BGL made me browse a bit and noticed this curious notes in the README [2] "Bugs and feature requests can be reported through the Trac issue tracker (...) Here [3] is why Trac is still in use." Is this information up to date? Last (substantial) change to the README.md happened in 2016. The Trac use rationale linked [3] from the readme is from 2015. [1] https://lists.boost.org/Archives/boost/2020/02/248164.php [2] https://github.com/boostorg/graph/blob/develop/README.md [3] https://lists.boost.org/Archives/boost/2015/04/221780.php Best regards, -- Mateusz Loskot, http://mateusz.loskot.net

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[Boost.GIL] GSoC 2020 - FFT implementation
by deb 06 Feb '20

06 Feb '20

Hi, I am a third year undergrad from IIT Bombay. I am interested in PROJECT 1: Image Processing Algorithms for BOOST.GIL . I have gone through the Getting started with Boost, Modular Boost Overview and Contributing page(on git repository for boost.gil) to get a fair idea of how Boost works. I went over the boost Gil library looking for an implementation of FFT(Fast Fourier transform) but could not find one . Since it is listed as a suggested project topic for the GSoC 2020 , I was hoping to implement it as part of my GSoC competency test. I have a few questions though:- a. Should I try and implement 1D-DFT(using FFT) independent from 2D-DFT (which is the more popular among image processing algorithms) ? b. Should I submit the above mentioned algorithms as separate PRs or as a single one? I am choosing FFT over other topics since it is an essential part of many image processing algorithms like Wiener filters, tomographic reconstructions etc. I have worked with image processing algorithms before on college projects and I think that I will be able to pull it off as a GSoC competency test. Thank You. Debabrata Mandal CSE undergrad, IIT Bombay -- Sent from: http://boost.2283326.n4.nabble.com/Boost-Dev-f2600599.html

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Boost_VERSION widely different between old CMake and new CMake find_package
by Dimitri John Ledkov 05 Feb '20

05 Feb '20

I have the following CMakeLists.txt: project(Boost CXX) cmake_minimum_required(VERSION 3.0) FIND_PACKAGE(Boost COMPONENTS filesystem REQUIRED) message( ${Boost_VERSION} ) In Ubuntu 18.04 LTS (Bionic) this produces: cmake ../ -- The CXX compiler identification is GNU 7.4.0 -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Boost version: 1.65.1 -- Found the following Boost libraries: -- filesystem -- system 106501 -- Configuring done -- Generating done -- Build files have been written to: /root/foo/build As in Boost_VERSION is set to 106501 In Ubuntu 20.04 LTS (Focal, devel release) which uses boost 1.71 with boost cmake files: -- The CXX compiler identification is GNU 9.2.1 -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Found Boost: /usr/lib/x86_64-linux-gnu/cmake/Boost-1.71.0/BoostConfig.cmake (found version "1.71.0") found components: filesystem 1.71.0 -- Configuring done -- Generating done -- Build files have been written to: /home/xnox/canonical/boost/debian/tests/srcs/filesystem/foo As in Boost_VERSION is set to 1.71.0 Now, lot of projects have Boost version comparison already and 1.71.0 is less than 106501. This creates problems for example when trying to detect and use new-style pythonXY components, filesystem v3 api, etc. For example I found in Ubuntu packages stanzas like: if (${Boost_VERSION} LESS 104400) Can we please fix Boost_VERSION in the new-style cmake to be compatible / same / similar / higher than the old Boost_VERSION string? -- Regards, Dimitri.

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[Boost.GIL] GSoC 2020 Project 1 - Seeking Mentor
by Ayush Bansal 01 Feb '20

01 Feb '20

Hi, I am a final year undergraduate student from IIT Khraragpur. I was interested in the project “Image Processing Algorithms” to be developed during GSoC 2020. I was mainly interested in implementation of Morphological IP Algorithms, Normalising channels and De-noising filters. I have a good knowledge about most of these algorithms and have worked with a lot of them as a part of my BTech Term Project. In addition to the list of algorithms provided for morphology, I had some other filters which I think could be implemented easily such as - Boundary Extraction, Hole Filling, Thinning and Thickening algorithms. Similarly, for de-noising filters, I was wondering if filters such as Conservative Smoothing, Adaptive Filters etc. could be added to the list. For my competency test, I was interested in doing the implementation of convolution filter and use it to detect edges. However, I did not understand where should I be posting my submission for the same. I have done my previous internship at Google India, where I implemented my code in Google’s Production server in C++, thus I also have the experience of writing good industry level code. I wanted to know if someone would be willing to mentor me for this project. Thanking you in advance. Regards Ayush Bansal Fifth Year Undergraduate Student Department of Computer Science and Engineering IIT Kharagpur

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