Trait num::Num

pub trait Num: Zero + One + NumOps<Self, Self> + PartialEq<Self> {
    type FromStrRadixErr;
    fn from_str_radix(
        str: &str, 
        radix: u32
    ) -> Result<Self, Self::FromStrRadixErr>;
}

The base trait for numeric types, covering 0 and 1 values, comparisons, basic numeric operations, and string conversion.

Associated Types

type FromStrRadixErr

Required Methods

fn from_str_radix(str: &str, radix: u32) -> Result<Self, Self::FromStrRadixErr>

Convert from a string and radix <= 36.

Examples

use num_traits::Num;

let result = <i32 as Num>::from_str_radix("27", 10);
assert_eq!(result, Ok(27));

let result = <i32 as Num>::from_str_radix("foo", 10);
assert!(result.is_err());

Implementations on Foreign Types

impl Num for usize

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<usize, ParseIntError>

impl Num for i8

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<i8, ParseIntError>

impl Num for u32

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<u32, ParseIntError>

impl Num for f64

type FromStrRadixErr = ParseFloatError

fn from_str_radix(
    src: &str,
    radix: u32
) -> Result<f64, <f64 as Num>::FromStrRadixErr>

impl Num for isize

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<isize, ParseIntError>

impl Num for u16

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<u16, ParseIntError>

impl Num for u64

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<u64, ParseIntError>

impl Num for f32

type FromStrRadixErr = ParseFloatError

fn from_str_radix(
    src: &str,
    radix: u32
) -> Result<f32, <f32 as Num>::FromStrRadixErr>

impl Num for i32

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<i32, ParseIntError>

impl<T> Num for Wrapping<T> where
    T: Num,
    Wrapping<T>: Mul<Wrapping<T>>,
    Wrapping<T>: Add<Wrapping<T>>,
    Wrapping<T>: Div<Wrapping<T>>,
    Wrapping<T>: Rem<Wrapping<T>>,
    Wrapping<T>: Sub<Wrapping<T>>,
    <Wrapping<T> as Add<Wrapping<T>>>::Output == Wrapping<T>,
    <Wrapping<T> as Sub<Wrapping<T>>>::Output == Wrapping<T>,
    <Wrapping<T> as Mul<Wrapping<T>>>::Output == Wrapping<T>,
    <Wrapping<T> as Div<Wrapping<T>>>::Output == Wrapping<T>,
    <Wrapping<T> as Rem<Wrapping<T>>>::Output == Wrapping<T>, 

type FromStrRadixErr = <T as Num>::FromStrRadixErr

fn from_str_radix(
    str: &str,
    radix: u32
) -> Result<Wrapping<T>, <Wrapping<T> as Num>::FromStrRadixErr>

impl Num for i16

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<i16, ParseIntError>

impl Num for u8

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<u8, ParseIntError>

impl Num for i64

type FromStrRadixErr = ParseIntError

fn from_str_radix(s: &str, radix: u32) -> Result<i64, ParseIntError>

impl<T> Num for Ratio<T> where
    T: Clone + Integer, 

type FromStrRadixErr = ParseRatioError

fn from_str_radix(s: &str, radix: u32) -> Result<Ratio<T>, ParseRatioError>

Parses numer/denom where the numbers are in base radix.

Implementors

• impl<T> Num for Complex<T> where
    T: Clone + Num,  type FromStrRadixErr = ParseComplexError<<T as Num>::FromStrRadixErr>;
• impl Num for BigUint type FromStrRadixErr = ParseBigIntError;
• impl Num for BigInt type FromStrRadixErr = ParseBigIntError;