1.0.0[−][src]Trait frame_support::dispatch::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.

Implementations on Foreign Types

impl UpperHex for u8[src][−]

impl UpperHex for u64[src][−]

impl UpperHex for i64[src][−]

impl UpperHex for NonZeroU8[src][−]

impl UpperHex for u32[src][−]

impl UpperHex for i32[src][−]

impl UpperHex for NonZeroIsize[src][−]

impl UpperHex for NonZeroU16[src][−]

impl UpperHex for NonZeroI64[src][−]

impl UpperHex for i16[src][−]

impl UpperHex for u16[src][−]

impl UpperHex for NonZeroUsize[src][−]

impl UpperHex for NonZeroI32[src][−]

impl UpperHex for NonZeroU64[src][−]

impl UpperHex for NonZeroU32[src][−]

impl UpperHex for NonZeroI128[src][−]

impl UpperHex for NonZeroI8[src][−]

impl UpperHex for NonZeroI16[src][−]

impl UpperHex for NonZeroU128[src][−]

impl UpperHex for isize[src][−]

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

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

impl UpperHex for i128[src][−]

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

impl UpperHex for usize[src][−]

impl UpperHex for i8[src][−]

impl UpperHex for u128[src][−]

impl<T> UpperHex for GenericArray<u8, T> where
    T: ArrayLength<u8> + Add<T>,
    <T as Add<T>>::Output: ArrayLength<u8>, [src][−]

impl UpperHex for BigUint[src][−]

impl UpperHex for BigInt[src][−]

impl UpperHex for H160[src][−]

impl UpperHex for H512[src][−]

impl UpperHex for H256[src][−]

impl UpperHex for Seed[src][−]

impl UpperHex for Mnemonic[src][−]

impl<'a, I> UpperHex for Format<'a, I> where
    I: Iterator,
    <I as Iterator>::Item: UpperHex, [src][−]

Implementors

impl UpperHex for Mnemonic

impl UpperHex for Seed

impl<O, T> UpperHex for BitSlice<O, T> where
    O: BitOrder,
    T: BitStore, 

impl<O, T> UpperHex for BitBox<O, T> where
    O: BitOrder,
    T: BitStore, 

impl<O, T> UpperHex for BitVec<O, T> where
    O: BitOrder,
    T: BitStore, 

impl UpperHex for Bloom

impl UpperHex for H32

impl UpperHex for H64

impl UpperHex for H128

impl UpperHex for H264

impl UpperHex for H520

impl<T: ArrayLength<u8>> UpperHex for GenericArray<u8, T> where
    T: Add<T>,
    <T as Add<T>>::Output: ArrayLength<u8>, 

impl<'a, I> UpperHex for Format<'a, I> where
    I: Iterator,
    I::Item: UpperHex, 

impl UpperHex for BigInt

impl UpperHex for BigUint

impl UpperHex for H160

impl UpperHex for H256

impl UpperHex for H512