prost-build: refactor code generator (ground work for builders)

tokio-rs / prost

PROST! a Protocol Buffers implementation for the Rust Language

Apache License 2.0

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Closed mzabaluev closed 4 months ago

mzabaluev commented 4 months ago

Refactoring of existing code taken out of #901:

Collect message field data into vectors of structs that can be reused in multiple passes. This will be useful for the upcoming generation of builders.
Add prost_path helper function to DRY repetitive expressions constructing the path to the prost crate for generated code.
Add boxed helper method to capture the logic of deciding whether a field is boxed.

mzabaluev commented 4 months ago

Superseded by #1016.