Trait ParseNum

pub trait ParseNum {
    // Required method
    fn parse_num<T: Num>(&self) -> Result<T, T::FromStrRadixErr>;
}

Required Methods

fn parse_num<T: Num>(&self) -> Result<T, T::FromStrRadixErr>

Parse string to number

This trait is default implemented for str, so both str and String type can use this method

Unlike from_str_radix where user must provide a radix, this method support auto hex, dec, oct, bin detection

Examples

use string_to_num::ParseNum;

assert_eq!("0".parse_num::<i32>().unwrap(), 0i32);
assert_eq!("10".parse_num::<f32>().unwrap(), 10f32);

assert_eq!("0x01".parse_num::<u16>().unwrap(), 1u16);
assert_eq!("0xFF".parse_num::<f64>().unwrap(), 255f64);
assert_eq!("0b1111".parse_num::<u8>().unwrap(), 0b1111u8);
assert_eq!("0o1463".parse_num::<u16>().unwrap(), 0o1463u16);

assert_eq!("0XfF".to_string().parse_num::<f64>().unwrap(), 255f64);
assert_eq!("0B1111".to_string().parse_num::<u8>().unwrap(), 0b1111u8);
assert_eq!("0O1463".to_string().parse_num::<u16>().unwrap(), 0o1463u16);

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ParseNum for str

fn parse_num<T: Num>(&self) -> Result<T, T::FromStrRadixErr>

Implementors