As Repr

Rust trait for constant #[repr(T)] conversions

Check out the documentation for examples.

Features

• Const trait workaround for stable Rust exposing a safe transmute to the repr type with a trait
• Optionally-enabled const trait workarounds for generic integer and float operations and comparisons on the inherent representation
  • inherent: Providing AsReprInherent built on AsRepr but chooses a specific representation to interpret as for const operations
  • cmp: Providing const fns generic for comparable types
  • float: Providing const fns generic for floating point types
  • int: Providing const fns generic for integer types
  • num: Providing const fns generic for numeric types (floats and ints)
  • ops: Providing const fns generic for mathematical types (numeric types and Durations)

MSRV

The current MSRV is Rust 1.91.

Any future MSRV updates will follow the Ardaku MSRV guidelines.

License

Copyright © 2025-2026 The As Repr Contributors.

Licensed under any of

• Apache License, Version 2.0, (LICENSE_APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• Boost Software License, Version 1.0, (LICENSE_BOOST or https://www.boost.org/LICENSE_1_0.txt)
• MIT License, (LICENSE_MIT or https://mit-license.org/)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as described above, without any additional terms or conditions.

AI / LLM (Non-)Usage

This project was developed without using AI tooling. AI usage for contributions is strictly banned, with the exception of AI tooling trained on exclusively CC0, Unlicense, or equivalently-licensed code. By opening a PR on this repository, you assert that the work (excluding any test data) is either human generated, computer generated trained on works in the public domain, or a combination of the two. AI bug reports are welcome as issues, as long as there is a disclaimer that it was discovered with AI.

Help

If you want help using or contributing to this library, feel free to send me an email at aldaronlau@gmail.com.