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Show HN: Galois connections for composable numeric casts in Rust
TL;DR
Rust developers can now utilize Galois connections as first-class values to perform lawful numeric type casts. This approach allows for the composition of conversion ladders with predictable round-trip behavior based on simple inequalities.
✦ Why It Matters
Engineers can adopt this crate to ensure safe and predictable numeric type conversions in their Rust projects.
Key Takeaways
- Use Galois connections for safe numeric type conversions.
- Leverage compile-time checks to avoid conversion errors.
- Utilize the provided macros for composing conversions.
- Explore examples to understand practical applications.
How It Works
Galois connections are defined by pairs of monotone functions that facilitate lawful conversions between numeric types. The crate allows developers to compose these connections statically, ensuring that the properties of each conversion are preserved throughout the chain.
By using the provided macros, developers can create complex conversion ladders that maintain type safety and clarity, avoiding pitfalls associated with standard casting operators.