Trait std::fmt::Binary
[−]
[src]
pub trait Binary { fn fmt(&self, &mut Formatter) -> Result<(), Error>; }
Format trait for the b
character.
The Binary
trait should format its output as a number in binary.
The alternate flag, #
, adds a 0b
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 '101010' in binary assert_eq!(format!("{:b}", x), "101010"); assert_eq!(format!("{:#b}", x), "0b101010");
Implementing Binary
on a type:
use std::fmt; struct Length(i32); impl fmt::Binary for Length { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let val = self.0; write!(f, "{:b}", val) // delegate to i32's implementation } } let l = Length(107); println!("l as binary is: {:b}", l);
Required Methods
Implementors
impl Binary for isize
impl Binary for usize
impl Binary for i8
impl Binary for u8
impl Binary for i16
impl Binary for u16
impl Binary for i32
impl Binary for u32
impl Binary for i64
impl Binary for u64
impl<'a, T> Binary for &'a T where T: Binary + ?Sized
impl<'a, T> Binary for &'a mut T where T: Binary + ?Sized