Shippai – handle error messages in other languages

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(crosspost from https://www.reddit.com/r/rust/comments/804pyr/shippai_handle_rust_errors_in_other_languages/)

Hi,

Over the weekend I wrote a small library to integrate failure with Python's FFI support. It can currently:

  • generate Python exception classes from the types defined in Rust
  • check a FFI call into Rust for errors and raise the corresponding exception in Python

I think it's already usable, but the API is quite rough (and unfinished) at the moment:

  • there is no special Result-type to convert Result<T, failure::Error> into, mostly because I am not sure about the design yet.
  • on the Rust-side, all types are created by a macro. That is because for some lib types, re-exporting external functions is not working.
  • More warts are mentioned in the README

Any feedback is greatly appreciated.

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