Trait std::fmt::Binary
pub trait Binary {
// Required method
fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}b formatting.
The Binary trait should format its output as a number in binary.
For primitive signed integers (i8 to i128, and isize), negative values are formatted as the two’s complement representation.
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!("{x:b}"), "101010");
assert_eq!(format!("{x:#b}"), "0b101010");
assert_eq!(format!("{:b}", -16), "11111111111111111111111111110000");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;
fmt::Binary::fmt(&val, f) // delegate to i32's implementation
}
}
let l = Length(107);
assert_eq!(format!("l as binary is: {l:b}"), "l as binary is: 1101011");
assert_eq!(
// Note that the `0b` prefix added by `#` is included in the total width, so we
// need to add two to correctly display all 32 bits.
format!("l as binary is: {l:#034b}"),
"l as binary is: 0b00000000000000000000000001101011"
);Required Methods
fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>Formats the value using the given formatter.
Implementors
impl Binary for i8impl Binary for i16impl Binary for i32impl Binary for i64impl Binary for i128impl Binary for isizeimpl Binary for u8impl Binary for u16impl Binary for u32impl Binary for u64impl Binary for u128impl Binary for usizeimpl Binary for NonZeroI8impl Binary for NonZeroI16impl Binary for NonZeroI32impl Binary for NonZeroI64impl Binary for NonZeroI128impl Binary for NonZeroIsizeimpl Binary for NonZeroU8impl Binary for NonZeroU16impl Binary for NonZeroU32impl Binary for NonZeroU64impl Binary for NonZeroU128impl Binary for NonZeroUsizeimpl<T> Binary for &T
where
T: Binary + ?Sized,impl<T> Binary for &mut T
where
T: Binary + ?Sized,impl<T> Binary for Saturating<T>
where
T: Binary,impl<T> Binary for Wrapping<T>
where
T: Binary,© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/fmt/trait.Binary.html