A reliable idiomatic wrapper for the C++ library `LEMON` [$400]

A reliable idiomatic LEMON wrapper [$400]

The JuliaGraphs/LEMONGraphs.jl package already exists and provides an extremely barebones wrapper for the LEMON C++ library. It is barely more than a proof of concept for the build infrastructure. A lot of this work probably will not be directly in the Graphs.jl repository.

• Fast conversion and/or views between Graphs.jl types and the C++ structures of LEMON (slow converters already exist for simple graphs)
• Complete Graph API support for the LEMONGraph types (so that LEMONGraph types can be used in all already existing Graph.jl algorithms that do not peek behind the API)
• use GraphsInterfaceChecker.jl in the test suite
• Dispatch from operations defined in Graphs/GraphsMatching/GraphsOptim to LEMON implementation. For instance if there is a pre-existing Graphs.some_interesting_property(::AbstractGraph) there should now be a new method defined in LEMONGraphs some_interesting_property(g::AbstractGraph, ::LEMONAlgorithm) that dispatches to the C++ implementation. It should convert the g argument to LEMONGraph if necessary.
• If there is an algorithm defined in LEMON that does not exist yet in Graphs.jl, it should be declared in Graphs.jl (just a function with docs but no methods), together with an error hint that LEMONGraphs is necessary. Given the large scope of the library, this can be more of a proof-of-concept setup, documenting how to add everything, but not expecting everything to be added for completing the bounty.
• Proper tests and documentation.
• PRs on this topic have to be submitted with clean git histories and well compartmentalized for ease of review.

Required skills: familiarity with the Graphs.jl API and understanding of the CxxWrap interface package.

Reviewer: any Graphs.jl member with merge rights

Duration: 3 months

Payout procedure:

The Funding for these bounties comes from the National Science Foundation and from the NSF Center for Quantum Networks. The payouts are managed by the NumFOCUS foundation and processed in bulk once every two months. If you live in a country in which NumFOCUS can make payments, you can participate in this bounty program.

Click here for more details about the bug bounty program.