Crate features / logos
Feature flags · logos 0.16.1 · from crates.io 2026-10-24
logos features: what each one does, and the line to copy
Short answerlogos 0.16.1 has 5 features. By default it turns on export_derive, std; add default-features = false to start from nothing. It needs Rust 1.80.0 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
debug | logos-derive?/debug | |
export_derive | yes | logos-derive |
forbid_unsafe | logos-derive?/forbid_unsafe | |
state_machine_codegen | logos-derive?/state_machine_codegen | |
std | yes | nothing else (a switch the code checks) |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version logos declares (rust-version), and the release that changed it:
- 0.14.0 (2024-02-07): Rust 1.65.0
- 0.14.2 (2024-09-18): Rust 1.70.0
- 0.15.0 (2024-12-07): Rust 1.74.0
- 0.14.4 (2024-12-10): Rust 1.70.0
- 0.15.1 (2025-08-08): Rust 1.74.0
- 0.16.0 (2025-12-07): Rust 1.80.0
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p logos --precise <version>, or use resolver 3, which picks compatible versions for you.
More on logos
Real downloads, dependents and alternatives: logos crate data (291.2K real downloads a day, 573 dependents).
docs.rs feature list · crates.io · license MIT OR Apache-2.0 · edition 2021
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