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Trait std::fmt::UpperHex

pub trait UpperHex {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}

X formatting.

The UpperHex trait should format its output as a number in hexadecimal, with A through F in upper case.

For primitive signed integers (i8 to i128, and isize), negative values are formatted as the two’s complement representation.

The alternate flag, #, adds a 0x 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 '2A' in hex

assert_eq!(format!("{:X}", x), "2A");
assert_eq!(format!("{:#X}", x), "0x2A");

assert_eq!(format!("{:X}", -16), "FFFFFFF0");

Implementing UpperHex on a type:

use std::fmt;

struct Length(i32);

impl fmt::UpperHex for Length {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let val = self.0;

        fmt::UpperHex::fmt(&val, f) // delegate to i32's implementation
    }
}

let l = Length(i32::MAX);

assert_eq!(format!("l as hex is: {:X}", l), "l as hex is: 7FFFFFFF");

assert_eq!(format!("l as hex is: {:#010X}", l), "l as hex is: 0x7FFFFFFF");

Required methods

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

Formats the value using the given formatter.

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Implementors

`impl UpperHex for i8`[src]

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

`impl UpperHex for i16`[src]

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

`impl UpperHex for i32`[src]

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

`impl UpperHex for i64`[src]

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

`impl UpperHex for i128`[src]

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

`impl UpperHex for isize`[src]

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

`impl UpperHex for u8`[src]

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

`impl UpperHex for u16`[src]

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

`impl UpperHex for u32`[src]

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

`impl UpperHex for u64`[src]

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

`impl UpperHex for u128`[src]

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

`impl UpperHex for usize`[src]

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

`impl UpperHex for NonZeroI8`[src]

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

`impl UpperHex for NonZeroI16`[src]

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

`impl UpperHex for NonZeroI32`[src]

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

`impl UpperHex for NonZeroI64`[src]

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

`impl UpperHex for NonZeroI128`[src]

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

`impl UpperHex for NonZeroIsize`[src]

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

`impl UpperHex for NonZeroU8`[src]

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

`impl UpperHex for NonZeroU16`[src]

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

`impl UpperHex for NonZeroU32`[src]

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

`impl UpperHex for NonZeroU64`[src]

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

`impl UpperHex for NonZeroU128`[src]

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

`impl UpperHex for NonZeroUsize`[src]

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

`impl<'_, T> UpperHex for &'_ T where T: UpperHex + ?Sized,` [src]

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

`impl<'_, T> UpperHex for &'_ mut T where T: UpperHex + ?Sized,` [src]

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

`impl<T> UpperHex for Wrapping<T> where T: UpperHex,` [src]

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

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© 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.UpperHex.html

Trait std::fmt::UpperHex

Examples

Required methods

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

Implementors

impl UpperHex for i8[src]

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

impl UpperHex for i16[src]

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

impl UpperHex for i32[src]

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

impl UpperHex for i64[src]

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

impl UpperHex for i128[src]

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

impl UpperHex for isize[src]

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

impl UpperHex for u8[src]

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

impl UpperHex for u16[src]

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

impl UpperHex for u32[src]

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

impl UpperHex for u64[src]

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

impl UpperHex for u128[src]

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

impl UpperHex for usize[src]

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

impl UpperHex for NonZeroI8[src]

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

impl UpperHex for NonZeroI16[src]

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

impl UpperHex for NonZeroI32[src]

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

impl UpperHex for NonZeroI64[src]

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

impl UpperHex for NonZeroI128[src]

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

impl UpperHex for NonZeroIsize[src]

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

impl UpperHex for NonZeroU8[src]

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

impl UpperHex for NonZeroU16[src]

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

impl UpperHex for NonZeroU32[src]

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

impl UpperHex for NonZeroU64[src]

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

impl UpperHex for NonZeroU128[src]

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

impl UpperHex for NonZeroUsize[src]

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

impl<'_, T> UpperHex for &'_ T where T: UpperHex + ?Sized, [src]

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

impl<'_, T> UpperHex for &'_ mut T where T: UpperHex + ?Sized, [src]

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

impl<T> UpperHex for Wrapping<T> where T: UpperHex, [src]

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

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

`impl UpperHex for i8`[src]

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

`impl UpperHex for i16`[src]

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

`impl UpperHex for i32`[src]

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

`impl UpperHex for i64`[src]

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

`impl UpperHex for i128`[src]

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

`impl UpperHex for isize`[src]

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

`impl UpperHex for u8`[src]

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

`impl UpperHex for u16`[src]

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

`impl UpperHex for u32`[src]

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

`impl UpperHex for u64`[src]

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

`impl UpperHex for u128`[src]

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

`impl UpperHex for usize`[src]

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

`impl UpperHex for NonZeroI8`[src]

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

`impl UpperHex for NonZeroI16`[src]

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

`impl UpperHex for NonZeroI32`[src]

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

`impl UpperHex for NonZeroI64`[src]

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

`impl UpperHex for NonZeroI128`[src]

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

`impl UpperHex for NonZeroIsize`[src]

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

`impl UpperHex for NonZeroU8`[src]

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

`impl UpperHex for NonZeroU16`[src]

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

`impl UpperHex for NonZeroU32`[src]

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

`impl UpperHex for NonZeroU64`[src]

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

`impl UpperHex for NonZeroU128`[src]

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

`impl UpperHex for NonZeroUsize`[src]

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

`impl<'_, T> UpperHex for &'_ T where T: UpperHex + ?Sized,` [src]

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

`impl<'_, T> UpperHex for &'_ mut T where T: UpperHex + ?Sized,` [src]

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

`impl<T> UpperHex for Wrapping<T> where T: UpperHex,` [src]

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