Expose prettyprint/serialize/parse options in rust

[segiddins]

No description provided.

[kddnewton]

I'm okay with prettyprint and the parse options, but I'm not sure I understand the use case for the serialization API in rust. Could you explain the motivation?

[segiddins]

The motivation is the ability to parse the AST into a more natural shape for use in rust, similar to what the prism ruby gem does (rather than maintaining pointers to the c structure nodes). I am using it in https://github.com/segiddins/gemfile-rs/blob/main/src/prism_ast/generated.rs, an in-progress project of mine