55 lines
1.6 KiB
Markdown
55 lines
1.6 KiB
Markdown
# num-traits
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[](https://crates.io/crates/num-traits)
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[](https://docs.rs/num-traits)
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[](https://travis-ci.org/rust-num/num-traits)
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Numeric traits for generic mathematics in Rust.
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## Usage
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Add this to your `Cargo.toml`:
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```toml
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[dependencies]
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num-traits = "0.2"
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```
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and this to your crate root:
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```rust
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extern crate num_traits;
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```
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## Features
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This crate can be used without the standard library (`#![no_std]`) by disabling
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the default `std` feature. Use this in `Cargo.toml`:
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```toml
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[dependencies.num-traits]
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version = "0.2"
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default-features = false
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# features = ["libm"] # <--- Uncomment if you wish to use `Float` and `Real` without `std`
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```
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The `Float` and `Real` traits are only available when either `std` or `libm` is enabled.
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The `libm` feature is only available with Rust 1.31 and later ([see PR #99](https://github.com/rust-num/num-traits/pull/99)).
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The `FloatCore` trait is always available. `MulAdd` and `MulAddAssign` for `f32`
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and `f64` also require `std` or `libm`, as do implementations of signed and floating-
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point exponents in `Pow`.
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Implementations for `i128` and `u128` are only available with Rust 1.26 and
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later. The build script automatically detects this, but you can make it
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mandatory by enabling the `i128` crate feature.
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## Releases
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Release notes are available in [RELEASES.md](RELEASES.md).
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## Compatibility
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The `num-traits` crate is tested for rustc 1.8 and greater.
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