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

x formatting.

The LowerHex trait should format its output as a number in hexadecimal, with a through f in lower 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 LowerHex on a type:

use std::fmt;

struct Length(i32);

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

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

let l = Length(9);

assert_eq!(format!("l as hex is: {:x}", l), "l as hex is: 9");

assert_eq!(format!("l as hex is: {:#010x}", l), "l as hex is: 0x00000009");

Required methods

Formats the value using the given formatter.

Implementations on Foreign Types

Implementors

impl LowerHex for Seed

impl<O, V> LowerHex for BitArray<O, V> where
    O: BitOrder,
    V: BitView

impl<T> LowerHex for Domain<'_, T> where
    T: BitStore

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

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

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

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

impl LowerHex for Scalar

impl<T, R: Dim, C: Dim, S> LowerHex for Matrix<T, R, C, S> where
    T: Scalar + LowerHex,
    S: Storage<T, R, C>,
    DefaultAllocator: Allocator<usize, R, C>, 

impl<T> LowerHex for Complex<T> where
    T: LowerHex + Num + PartialOrd + Clone

impl<T: LowerHex + Clone + Integer> LowerHex for Ratio<T>

impl LowerHex for U128

impl LowerHex for U256

impl LowerHex for U512

impl LowerHex for H128

impl LowerHex for H160

impl LowerHex for H256

impl LowerHex for H512

impl<A: Array> LowerHex for ArrayVec<A> where
    A::Item: LowerHex

impl<'s, T> LowerHex for SliceVec<'s, T> where
    T: LowerHex

impl<A: Array> LowerHex for TinyVec<A> where
    A::Item: LowerHex

impl<T: Binary + LowerHex> LowerHex for FmtBinary<T>

impl<T: Display + LowerHex> LowerHex for FmtDisplay<T>

impl<T: LowerHex> LowerHex for FmtLowerHex<T>

impl<T: Octal + LowerHex> LowerHex for FmtOctal<T>

impl<T: Pointer + LowerHex> LowerHex for FmtPointer<T>