elastio/bon

Health v2 · maintenance only

Adoption not part of the score

2120 stars · 43 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

bon is a Rust crate that generates compile-time-checked builders for structs and functions via derive macros and the #[builder] attribute. It also provides idiomatic named and optional parameters for functions and methods, with no_std support.

Use cases

• generate builders for rust structs
• named function arguments in rust
• avoid positional parameter mistakes in rust apis
• partial application with optional parameters
• builder pattern without boilerplate
• no_std builder generation

When to choose

• you want compile-time-checked builders with zero boilerplate
• you need named or optional parameters for functions and methods
• you need no_std compatibility
• you want good IDE experience with macro-generated signatures

When to avoid

• you prefer plain struct update syntax or manual constructors
• your project avoids proc macros or has an old rustc below the MSRV
• you need runtime-configurable builders rather than compile-time generation

Facets

library · maturity stable

developer-tools developer-tools programming-languages rust cross-platform builder-pattern derive-macro named-arguments compile-time-checked no-std setters code-generation

Member repositories

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