Trait nom::lib::std::fmt::LowerHex

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

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

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

Formats the value using the given formatter.

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Implementations on Foreign Types

impl LowerHex for i16

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

impl LowerHex for NonZeroUsize

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

impl LowerHex for u128

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

impl LowerHex for u16

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

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

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

impl LowerHex for NonZeroU16

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

impl LowerHex for i128

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

impl LowerHex for i32

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

impl LowerHex for isize

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

impl LowerHex for u8

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

impl LowerHex for i8

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

impl LowerHex for u32

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

impl LowerHex for NonZeroIsize

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

impl LowerHex for NonZeroI32

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

impl<T> LowerHex for Wrapping<T> where
    T: LowerHex, 

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

impl LowerHex for NonZeroI8

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

impl LowerHex for NonZeroI64

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

impl LowerHex for NonZeroI128

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

impl LowerHex for NonZeroU128

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

impl LowerHex for NonZeroU64

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

impl LowerHex for NonZeroU8

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

impl LowerHex for i64

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

impl LowerHex for usize

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

impl LowerHex for NonZeroI16

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

impl LowerHex for NonZeroU32

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

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

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

impl LowerHex for u64

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

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

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

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

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

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

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

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

Render the contents of a BitSlice in a numeric format.

These implementations render the bits of memory contained in a BitSlice as one of the three numeric bases that the Rust format system supports:

• Binary renders each bit individually as 0 or 1,
• Octal renders clusters of three bits as the numbers 0 through 7,
• and UpperHex and LowerHex render clusters of four bits as the numbers 0 through 9 and A through F.

The formatters produce a “word” for each element T of memory. The chunked formats (octal and hexadecimal) operate somewhat peculiarly: they show the semantic value of the memory, as interpreted by the ordering parameter’s implementation rather than the raw value of memory you might observe with a debugger. In order to ease the process of expanding numbers back into bits, each digit is grouped to the right edge of the memory element. So, for example, the byte 0xFF would be rendered in as 0o377 rather than 0o773.

Rendered words are chunked by memory elements, rather than by as clean as possible a number of digits, in order to aid visualization of the slice’s place in memory.

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

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

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

impl<T> LowerHex for FmtLowerExp<T> where
    T: LowerHex + LowerExp, 

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

impl<T> LowerHex for FmtUpperExp<T> where
    T: LowerHex + UpperExp, 

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

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

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

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

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

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

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

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

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

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

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

impl<T> LowerHex for FmtUpperHex<T> where
    T: LowerHex + UpperHex, 

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

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Implementors

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