Re: [boost] [Math/Special Functions] Is there any interest in the Lambert W function?

Subject: Re: [boost] [Math/Special Functions] Is there any interest in the Lambert W function?
From: Edward Diener (eldiener_at_[hidden])
Date: 2016-09-25 23:22:32

On 9/25/2016 6:30 PM, Christopher Kormanyos wrote:
>
>> I'm working on a C++ implementation of the Lambert W
>> (a.k.a. product logarithm or Omega function) and I wanted to ask
>> the Boost developer community if there is interest in adding it to the
>> library.
>
>> The current version can be found on GitHub:
> In my opinion, this is an interesting function.
> After a very quick look at the code, I noticed three potentialissues.
> 1) There are instances of constexpr commented outin the code. The macro BOOST_CONSTEXPR is availablein <boost/config.hpp>. This macro selects the appropriateversion of constexpr (or none at all) for the given compilerat compile time.
> 2) There is use of std::arrayin the code. I believe that one ofthe strengths of Boost.Math is compatibility with C++03.You might consider replacing <array> and std::arraywith <boost/array.hpp> and boost::array. This is because<array> and std::array are only available in C++11 or beyond.

You could also pretty easily use my CXX Dual library ( 
https://github.com/eldiener/cxx_dual.git) to use std::array when it is 
available, otherwise boost::array.

> 3) Testing is required for inclusion the the library.
> John might have more to say.
>
> Thank you for your interest, Chris.
>
>
>     On Sunday, September 25, 2016 2:33 PM, Balázs Cziráki <balazs.cziraki_at_[hidden]> wrote:
>
>
>  Greetings!
>
> I'm working on a C++ implementation of the Lambert W
> (a.k.a. product logarithm or Omega function) and I wanted to ask
> the Boost developer community if there is interest in adding it to the
> library.
>
> The current version can be found on GitHub:
>
> https://github.com/CzB404/lambert_w/
>
> I've successfully tested it with Cygwin GCC v5.4, v6.2
> and with MinGW GCC that is supplied with Code::Blocks,
> and also on Visual Studio 2015.
> A test on a Linux based OS (probably Ubuntu) is also going to happen.
>
> Any suggestions or constructive criticism is welcome.
>
> Best regards,
> Balázs Cziráki
>
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