1.0.0[][src]Trait core::fmt::UpperHex

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

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");Run

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;

        write!(f, "{:X}", val) // delegate to i32's implementation
    }
}

let l = Length(9);

println!("l as hex is: {:X}", l);Run

Required methods

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

Loading content...

Implementors

impl UpperHex for NonZeroI128[src]

impl UpperHex for NonZeroI16[src]

impl UpperHex for NonZeroI32[src]

impl UpperHex for NonZeroI64[src]

impl UpperHex for NonZeroI8[src]

impl UpperHex for NonZeroIsize[src]

impl UpperHex for NonZeroU128[src]

impl UpperHex for NonZeroU16[src]

impl UpperHex for NonZeroU32[src]

impl UpperHex for NonZeroU64[src]

impl UpperHex for NonZeroU8[src]

impl UpperHex for NonZeroUsize[src]

impl UpperHex for i8[src]

impl UpperHex for i16[src]

impl UpperHex for i32[src]

impl UpperHex for i64[src]

impl UpperHex for i128[src]

impl UpperHex for isize[src]

impl UpperHex for u8[src]

impl UpperHex for u16[src]

impl UpperHex for u32[src]

impl UpperHex for u64[src]

impl UpperHex for u128[src]

impl UpperHex for usize[src]

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

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

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

Loading content...