Trait std::fmt::Octal 1.0.0
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[src]
pub trait Octal {
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>;
}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 u8impl Octal for isizeimpl Octal for i8impl Octal for u128impl Octal for usizeimpl<T> Octal for Wrapping<T> where
T: Octal,impl<'a, T> Octal for &'a mut T where
T: Octal + ?Sized,impl Octal for u32impl Octal for i64impl Octal for u64impl Octal for i16impl Octal for u16impl<'a, T> Octal for &'a T where
T: Octal + ?Sized,impl Octal for i32impl Octal for i128