Trait core::fmt::Octal 1.0.0[−][src]
o formatting.
The Octal trait should format its output as a number in base-8.
For primitive signed integers (i8 to i128, and isize),
negative values are formatted as the two’s complement representation.
The alternate flag, #, adds a 0o in front of the output.
For more information on formatters, see the module-level documentation.
Examples
Basic usage with i32:
let x = 42; // 42 is '52' in octal assert_eq!(format!("{:o}", x), "52"); assert_eq!(format!("{:#o}", x), "0o52"); assert_eq!(format!("{:o}", -16), "37777777760");Run
Implementing Octal on a type:
use std::fmt; struct Length(i32); impl fmt::Octal for Length { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let val = self.0; write!(f, "{:o}", val) // delegate to i32's implementation } } let l = Length(9); println!("l as octal is: {:o}", l);Run
Required Methods
Implementors
impl Octal for NonZeroU8impl Octal for NonZeroU16impl Octal for NonZeroU32impl Octal for NonZeroU64impl Octal for NonZeroU128impl Octal for NonZeroUsizeimpl<T: Octal> Octal for Wrapping<T>impl Octal for isizeimpl Octal for usizeimpl Octal for i8impl Octal for u8impl Octal for i16impl Octal for u16impl Octal for i32impl Octal for u32impl Octal for i64impl Octal for u64impl Octal for i128impl Octal for u128impl<'a, T: ?Sized + Octal> Octal for &'a Timpl<'a, T: ?Sized + Octal> Octal for &'a mut T