1// Copyright 2014-2016 The Rust Project Developers. See the COPYRIGHT
2// file at the top-level directory of this distribution and at
3// http://rust-lang.org/COPYRIGHT.
4//
5// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8// option. This file may not be copied, modified, or distributed
9// except according to those terms.
10
11//! A collection of numeric types and traits for Rust.
12//!
13//! This includes new types for big integers, rationals, and complex numbers,
14//! new traits for generic programming on numeric properties like `Integer`,
15//! and generic range iterators.
16//!
17//! ## Example
18//!
19//! This example uses the BigRational type and [Newton's method][newt] to
20//! approximate a square root to arbitrary precision:
21//!
22//! ```
23//! # #[cfg(any(feature = "alloc", feature = "std"))]
24//! # mod test {
25//!
26//! use num::FromPrimitive;
27//! use num::bigint::BigInt;
28//! use num::rational::{Ratio, BigRational};
29//!
30//! # pub
31//! fn approx_sqrt(number: u64, iterations: usize) -> BigRational {
32//! let start: Ratio<BigInt> = Ratio::from_integer(FromPrimitive::from_u64(number).unwrap());
33//! let mut approx = start.clone();
34//!
35//! for _ in 0..iterations {
36//! approx = (&approx + (&start / &approx)) /
37//! Ratio::from_integer(FromPrimitive::from_u64(2).unwrap());
38//! }
39//!
40//! approx
41//! }
42//! # }
43//! # #[cfg(not(any(feature = "alloc", feature = "std")))]
44//! # mod test { pub fn approx_sqrt(n: u64, _: usize) -> u64 { n } }
45//! # use crate::test::approx_sqrt;
46//!
47//! fn main() {
48//! println!("{}", approx_sqrt(10, 4)); // prints 4057691201/1283082416
49//! }
50//!
51//! ```
52//!
53//! [newt]: https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method
54//!
55//! ## Compatibility
56//!
57//! The `num` crate is tested for rustc 1.60 and greater.
58
59#![doc(html_root_url = "https://docs.rs/num/0.4")]
60#![no_std]
61
62#[cfg(any(feature = "alloc", feature = "std"))]
63pub use num_bigint::{BigInt, BigUint};
64
65pub use num_complex::Complex;
66
67#[cfg(any(feature = "alloc", feature = "std"))]
68pub use num_rational::BigRational;
69#[allow(deprecated)]
70pub use num_rational::Rational;
71pub use num_rational::{Rational32, Rational64};
72
73pub use num_integer::Integer;
74
75pub use num_iter::{range, range_inclusive, range_step, range_step_inclusive};
76
77#[cfg(any(feature = "libm", feature = "std"))]
78pub use num_traits::Float;
79pub use num_traits::{
80 abs, abs_sub, cast, checked_pow, clamp, one, pow, signum, zero, Bounded, CheckedAdd,
81 CheckedDiv, CheckedMul, CheckedSub, FromPrimitive, Num, NumCast, One, PrimInt, Saturating,
82 Signed, ToPrimitive, Unsigned, Zero,
83};
84
85#[cfg(any(feature = "alloc", feature = "std"))]
86pub mod bigint {
87 pub use num_bigint::*;
88}
89
90pub mod complex {
91 pub use num_complex::*;
92}
93
94pub mod integer {
95 pub use num_integer::*;
96}
97
98pub mod iter {
99 pub use num_iter::*;
100}
101
102pub mod traits {
103 pub use num_traits::*;
104}
105
106pub mod rational {
107 pub use num_rational::*;
108}
109