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Optional library
by anshu khare 19 Jan '20

19 Jan '20

Hi I ran the following code: const std::string i = "some string"; boost::optional<const std::string&> str = i; cout << get_optional_value_or(str, "some other string") ; It gives the output as : some string Which is absolutely fine. But when I run const std::string i = {}; boost::optional<const std::string&> str = i; cout << get_optional_value_or(str, "some other string") ; The output is an empty string. Shouldn't it give "some other string as output" because if I run the same code with integer it gives the second parameter of get_optional_value_or() as output?

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New Boost Review Wizard: Volunteers
by Glen Fernandes 18 Jan '20

18 Jan '20

We need a new Review Wizard to take Ron's place. The duties include coordinating with review managers, scheduling reviews, and updating the website accordingly. Or as https://www.boost.org/community/reviews.html#Wizard puts it: > * When a formal review is requested for a library: > ** Approve the review manager based on their participation in the Boost community, including the mailing list, previous reviews, and other forums. > ** Suggest a schedule, after checking (via private email) availability of the review manager and library author. > ** Finalize the schedule, once the review manager verifies the library is actually ready for review. > ** Resolve schedule slips or other issues with review managers and submitters. > * Maintains a schedule of both past and pending reviews, in the form of the Review Schedule web page. > * Resolves questions from review managers and library submitters, who sometimes want a third opinion on questions such as "Should we extend the review period because ...?" > * Monitors the general review process, and makes minor adjustments as needed, or queries the list about possible major adjustments. When we appoint the new Review Wizard, I can grant them access to boostorg/website and provide more details about how to update it. We would like someone who is a Boost library author or contributor if possible. Any takers? Glen

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GSoC 2020 and Boost C++
by David Bellot 18 Jan '20

18 Jan '20

Hi Boost community, Boost C++ will apply again this year to be a mentoring organization for the Google Summer of Code. We are seeking mentors with good projects to join us and have the chance to mentor students from all around the world and contribute code to one of the Boost library. Applications for organization open tomorrow and are open until February 5th. We will apply as usual. In the meantime, help me and propose new projects, declare yourself as a potential mentors on the Boost mailing list and start editing the page at https://github.com/boostorg/boost/wiki/Google-Summer-of-Code%3A-2020 with your own project. Best regards, David

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Potential Mentor's Interest in Boost GSoC2020
by Christopher Kormanyos 17 Jan '20

17 Jan '20

Dear Boost, A generic reminder that org applications GSoC 2020has reached me in another forum yesterday. I'm not the organizer of this, but a potential mentor.Do other potential mentors have suitable projectsand interest in mentoring? Based on previous years,interest this year seems less strong. But the timeto get involved is upon us. I posted one of my potential projects here: https://github.com/boostorg/boost/wiki/Google-Summer-of-Code:-2020 ...And it has remained alone for almost 1 week. Best regards, Chris

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Extension of math/complex library
by anshu khare 17 Jan '20

17 Jan '20

Hi mentors, I would like extend math/complex library in which the user will be able to compute roots of equation like z^n - a =0 where n,a € R+. Example : z^4 - 1 = 0 Anshu

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(no subject)
by anshu khare 17 Jan '20

17 Jan '20

I verified it when I ran Cout<<fixed<<setprecision(20) << cos(7*pi/2) << endl; The output of the above line came out to be -0.000 In the earlier code when the output came as -1. 06911e - 50, I thought it to be like (-50) + (-1. 06911e ) which seemed a highly negative value to me.

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Incorrect values of sin and cos
by anshu khare 17 Jan '20

17 Jan '20

cos(3*pi(cpp_bin_float_50>()/2)) does not give correct value. Only cos(pi(cpp_bin_float_50>()/2)) gives correct value. All odd multiples of cos(pi/2) do not give correct value. The issue with sin() as well. Anshu

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Future directions for Boost.Math and Boost.Multiprecision
by pbristow＠hetp.u-net.com 16 Jan '20

16 Jan '20

Trying to obtain some user (and potential user) feedback, and guidance on future work, a discussion at https://github.com/boostorg/math/issues/303 has been started. If you (or your friends and colleagues) have ideas for mathy things like 'special' functions, statistical distributions, tools like integration, curve fitting, signal processing ... that the current libraries do not meet, please feel free to contribute to this wish-list collection of ideas. (This is not, of course, a promise to implement everything or indeed anything! But might help us to focus work on areas that have most value to users.) Paul

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Worked on issue 49
by anshu khare 16 Jan '20

16 Jan '20

Hi I have worked on issue 49 of core library. Should I pull a request regarding the same?

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(no subject)
by anshu khare 16 Jan '20

16 Jan '20

cos(3*pi(cpp_bin_float_50>()/2)) does not give correct value.

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