[WIP] Rust language backend support

[giuseppe998e]

This PR brings the Rust language support to schema-salad-tool, enabling Rust code generation alongside existing backends.

Currently the salad-core library (crate), which will handle document (de)serialization, is undergoing a major refactoring. The code will be located in the giuseppe998e/schema_salad repository branch.

Current Status

• [x] Code generation from Schema Salad schemas to Rust is implemented.
• [ ] Deserialization logic in Rust is not yet implemented.
• [ ] Serialization logic in Rust is still missing.
• [ ] Comprehensive tests need to be written and validated.

This PR is still a draft, and feedback is highly appreciated!

[mr-c]

Hello @giuseppe998e ; would you like to have a meeting to discuss how to get this code merged?

[mr-c]

It is nice to see the progress @giuseppe998e ; let me know if you need help with that mypyc error. Here is a hint: https://mypyc.readthedocs.io/en/latest/native_classes.html#inheritance

[giuseppe998e]

Hi @mr-c, I was about to reply to your first comment. Sorry for the delay in responding, but at that time, for personal reasons, I was unable to work on the extension until now.

---

Anyway, yes, I'm solving the compatibility issues (or at least I'm trying to)... The compilation fails (I think) due to an error related to @dataclass and inheritance, which I'm trying to understand.

[giuseppe998e]

The compilation fails (I think) due to an error related to @dataclass and inheritance, which I'm trying to understand.

I solved it by completely removing the @dataclass annotations from the code. What a shame, I don't know if it's the only possible choice, but it's certainly not the cleanest. I would have gladly avoided writing all those __init__ methods.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 29.30728% with 398 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 77.84%. Comparing base (01aa050) to head (7464c78).

Files with missing lines	Patch %	Lines
schema_salad/rust_codegen.py	29.39%	391 Missing and 3 partials :warning:
schema_salad/codegen.py	20.00%	4 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #917      +/-   ##
==========================================
- Coverage   83.36%   77.84%   -5.52%     
==========================================
  Files          22       23       +1     
  Lines        4952     5515     +563     
  Branches     1185     1278      +93     
==========================================
+ Hits         4128     4293     +165     
- Misses        547      942     +395     
- Partials      277      280       +3     

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