It is interesting to me, are there any crates which can parse custom grammar into a rust grammar to be compiled after? For example, I want to create another language ontop of rust, so I need to create a translator which translates my new language into rust or directly into rust’s ast suitable for rustc compiler.
I am not sure, but I think I saw such crate half year ago somewhere in github, but I can’t find it now.
You can build Rust syntax reliably using https://github.com/dtolnay/quote (previously it was done by syntex_syntax::pprint).
Apart from that I think you need to pick a parser (e.g. nom) and translate your language into Rust (entirely up to you).
Askama parses (with nom) Jinja-like templates and generates Rust code for them through a custom derive macro.
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