Trait std::fmt::Binary

pub trait Binary {
    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.


Basic usage with i32:

let x = 42; // 42 is '101010' in binary

assert_eq!(format!("{:b}", x), "101010");
assert_eq!(format!("{:#b}", x), "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: {:b}", l), "l as binary is: 1101011");

    format!("l as binary is: {:#032b}", l),
    "l as binary is: 0b000000000000000000000001101011"

Required methods

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

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impl Binary for i8[src]

impl Binary for i16[src]

impl Binary for i32[src]

impl Binary for i64[src]

impl Binary for i128[src]

impl Binary for isize[src]

impl Binary for u8[src]

impl Binary for u16[src]

impl Binary for u32[src]

impl Binary for u64[src]

impl Binary for u128[src]

impl Binary for usize[src]

impl Binary for NonZeroI8[src]

impl Binary for NonZeroI16[src]

impl Binary for NonZeroI32[src]

impl Binary for NonZeroI64[src]

impl Binary for NonZeroI128[src]

impl Binary for NonZeroIsize[src]

impl Binary for NonZeroU8[src]

impl Binary for NonZeroU16[src]

impl Binary for NonZeroU32[src]

impl Binary for NonZeroU64[src]

impl Binary for NonZeroU128[src]

impl Binary for NonZeroUsize[src]

impl<'_, T> Binary for &'_ T where
    T: Binary + ?Sized

impl<'_, T> Binary for &'_ mut T where
    T: Binary + ?Sized

impl<T> Binary for Wrapping<T> where
    T: Binary

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© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.