PROST! is a Protocol Buffers implementation for the Rust Language. prost generates simple, idiomatic Rust code from proto2 and proto3 files.

Breaking changes

• prost: Relax Message Debug trait bound (#1147)

  BREAKING CHANGE: trait Debug was a supertrait of trait Message. This is no longer required by prost. If your code relies on trait Debug being implemented for every impl Message, you must now explicitly state that you require both Debug and Message. For example: where M: Debug + Message

• prost: Remove prost-derive feature (#1247)

  BREAKING CHANGE: Feature flag prost-derive is renamed to derive. Please rename any usage of prost-derive feature in your Cargo.toml.

• prost-build: Emit rerun commands (#1140)

  BREAKING CHANGE: Previously cargo assumed it had to rerun build.rs if any files in the project changed. prost-build will now emit rerun commands, which means only the explicitly marked files cause a rerun. If your build.rs is dependent on any other file paths than those given to prost-build, then your build.rs needs to emit rerun commands as well.

• prost-build: Prevent repeated fields to be boxed (#1237)

  BREAKING CHANGE: A repeated field that is manually marked as boxed was typed as Vec<Box<T>>. Those fields are now simply typed as Vec<T> to prevent double indirection. The boxed configuration is effectively ignored for repeated fields.

• prost-build: Make type_name_domain cumulative (#1228)

  BREAKING CHANGE: The configuration for domain names of messages is now cumulative. All calls to prost_build::Config::type_name_domain are now concatenated. The previous behavior was that only the arguments of the last call were used. If you do multiple calls to type_name_domain, you need to remove all but the last call to maintain the same behavior.

• prost-build: Derive Eq and Hash trait for messages where possible (#1175)

  BREAKING CHANGE: prost-build will automatically derive trait Eq and trait Hash for types where all field support those as well. If you manually impl Eq and/or impl Hash for generated types, then you need to remove the manual implementation. If you use type_attribute to derive(Eq) and/or derive(Hash), then you need to remove those.

Features

• prost-types: Implement conversion Duration to/from chrono::TimeDelta (#1236)
• prost-build: Prepare for 2024 keyword gen (#1257)

Dependencies

• (deps) Update pulldown-cmark to 0.13 (#1259)
• (deps) update criterion requirement from 0.5 to 0.6 (#1280)

Documentation

• Update dead link LICENSE in prost-types/README.md (#1262)

Styling

• Use DoubleEndedIterator::next_back (#1255)
• Fix typo (#1260)

Testing

• Run tests using edition 2024 (#1254)
• Run clippy with edition 2024 enabled (#1256)