Hi, one of the paper authors here. This is unfortunately only part of the story. This "calculette" covers only a fraction of the tax computation; furthermore, without knowing the crazy semantics and computational rules of the M language, it's very hard to reproduce the tax computation.

As a side-note, the source code appears to have moved here: https://gitlab.adullact.net/dgfip/ir-calcul

The languages breakdown is interesting. It seems GitHub refuses to admit defeat and categorises the .m files into various other languages which use the extension (M, MATLAB, Objective-C, Mathematica and Mercury). I wonder if they use some sort of fuzzy ML solution for categorising them rather than conventional parsing.

I can't help but wonder what awesome things happen in "iliad" and "ocean" mode after looking at some of those files:

    application : pro, batch , iliad,oceans ;