The project is in its early stages: contributions are welcome and would be **very** helpful, but the project is not *yet* optimized for contribution. Moreover, it is doubly experimental, so there's no guarantee that any work here would reach production. That said, here are some areas where contributions would be **especially** welcome: * Designing internal data structures: RFC only outlines the constraints, it's an open question how to satisfy them in the optimal way. See `ARCHITECTURE.md` for current design questions. * Porting libsyntax parser to libsyntax2: currently libsyntax2 parses only a tiny subset of Rust. This should be fixed by porting parsing functions from libsyntax one by one. Take a look at the [libsyntax parser](https://github.com/rust-lang/rust/blob/6b99adeb11313197f409b4f7c4083c2ceca8a4fe/src/libsyntax/parse/parser.rs) for "what to port" and at the [Kotlin parser](https://github.com/JetBrains/kotlin/blob/4d951de616b20feca92f3e9cc9679b2de9e65195/compiler/frontend/src/org/jetbrains/kotlin/parsing/KotlinParsing.java) for "how to port". * Writing validators: by design, libsyntax2 is very lax about the input. For example, the lexer happily accepts unclosed strings. The idea is that there should be a higher level visitor, which walks the syntax tree after parsing and produces all the warnings. Alas, there's no such visitor yet :( Would you like to write one? :) * Creating tests: it would be tremendously helpful to read each of libsyntax and libsyntax2 parser functions and crate a small separate test cases to cover each and every edge case. * Building stuff with libsyntax2: it would be really cool to compile libsyntax2 to WASM and add *client side* syntax validation to rust playground! Do take a look at the issue tracker, and try to read other docs in the [./docs](https://github.com/matklad/libsyntax2/tree/master/docs) folder! If you don't know where to start, or have *any* questions or suggestions, don't hesitate to chat at [Gitter](https://gitter.im/libsyntax2/Lobby)!