idanarye/rust-typed-builder

Health v2 · maintenance only

Adoption not part of the score

1201 stars · 60 forks observed · 2026-08-28

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

A Rust proc-macro crate that derives a compile-time type-checked builder pattern for structs. It enforces at compile time that all mandatory fields are set exactly once, while supporting defaults and optional fields.

Use cases

• generate builders for rust structs
• enforce named constructor arguments at compile time
• make struct fields optional with defaults
• prevent setting a field twice in a builder
• replace verbose constructor boilerplate in rust

When to choose

• you want compile-time guarantees that all required fields are set before build
• you want setters that reject duplicate field assignment at compile time
• you need optional fields with default values in a builder
• you want a lightweight derive macro rather than a runtime builder

When to avoid

• you need a builder you can pass around or clone - use derive-builder instead
• you want clean compiler errors; missing/duplicate fields surface as deprecation warnings
• you need runtime flexibility or fancy builder tricks with the generated type

Facets

library · maturity active

boilerplate type-system developer-tools developer-tools programming-languages rust cross-platform builder-pattern proc-macro derive-macro compile-time-verification named-arguments

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