1[](https://crates.io/crates/typenum) 2[](https://travis-ci.org/paholg/typenum) 3 4Typenum 5===== 6 7Typenum is a Rust library for type-level numbers evaluated at compile time. It currently 8supports bits, unsigned integers, and signed integers. 9 10Typenum depends only on libcore, and so is suitable for use on any platform! 11 12For the full documentation, go [here](https://docs.rs/typenum). 13 14### Importing 15 16While `typenum` is divided into several modules, they are all re-exported through the crate root, 17so you can import anything contained herein with `use typenum::whatever;`, ignoring the 18crate structure. 19 20You may also find it useful to treat the `consts` module as a prelude, perfoming a glob import. 21 22### Example 23 24Here is a trivial example of `typenum`'s use: 25 26```rust 27use typenum::{Sum, Exp, Integer, N2, P3, P4}; 28 29type X = Sum<P3, P4>; 30assert_eq!(<X as Integer>::to_i32(), 7); 31 32type Y = Exp<N2, P3>; 33assert_eq!(<Y as Integer>::to_i32(), -8); 34``` 35 36For a non-trivial example of its use, see one of the crates that depends on it. The full 37list is [here](https://crates.io/crates/typenum/reverse_dependencies). Of note are 38[dimensioned](https://crates.io/crates/dimensioned/) which does compile-time type 39checking for arbitrary unit systems and 40[generic-array](https://crates.io/crates/generic-array/) which provides arrays whose 41length you can generically refer to. 42 43
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