pest VS rust-csv

And some related parser tools: - https://github.com/kevinmehall/rust-peg - https://github.com/pest-parser/pest - https://github.com/lalrpop/lalrpop

I had recently completed the first year of my Computer Science class at school and will begin my second year soon. My schools' class forces the use of Java programming language, and I absolutely hated it. So, over the course of a little less than a month, I wrote my own programming language, in Rust (objectively best programming language), using pest, to be as similar to Rust as possible, but compiling to Java.

I second pest.rs. Using it is fairly intuitive and there's also a live playground on their website which is great for quickly developing and testing your AST (abstract syntax tree) parser for whatever language you're implementing.

This is where you'll run into trouble. People who write parsing-related Rust crates generally write things like pest that expect their syntax to be defined completely at compile time so the parser can be run through the compiler's optimizers for best performance.

Give https://pest.rs a try.

For now I have used pest to generate an AST that borrows from the given input. But if I can manage to make the parser generic over the return type it may be worth a refactoring.

Serde for most of your input and output formats, with the serde-yaml and csv crates for format backends.

If you want to do it in Rust, then you could combine the https://github.com/mjc-gh/rev_lines and and https://github.com/BurntSushi/rust-csv crates.

csv for writing to CSV

Pair that with Serde for serialization/deserialization (JSON, TOML, YAML, CSV/TSV, XML, URL query strings, etc.), Figment for configuration, and ignore for filesystem traversal with blacklist support, and Rust is a real joy for writing CLI utilities.

I had a similar issue and learned that internally tagged enums are not (and apparently can't be) supported: github issue.

Yep, I'll try to have a look at the nesting PR https://github.com/BurntSushi/rust-csv/pull/197 tonight, don't want to be a bitch, and not helping ahah :)