Trait std::fmt::LowerHex 1.0.0[−][src]
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");Run
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; write!(f, "{:x}", val) // delegate to i32's implementation } } let l = Length(9); println!("l as hex is: {:x}", l);Run
Required Methods
Implementors
impl LowerHex for u128impl LowerHex for NonZeroU64impl LowerHex for usizeimpl<T> LowerHex for Wrapping<T> where
T: LowerHex,impl<'a, T> LowerHex for &'a T where
T: LowerHex + ?Sized,impl LowerHex for u16impl LowerHex for NonZeroU16impl LowerHex for i128impl LowerHex for NonZeroU128impl LowerHex for i8impl LowerHex for isizeimpl LowerHex for u64impl LowerHex for NonZeroU8impl LowerHex for u32impl LowerHex for NonZeroU32impl LowerHex for i64impl<'a, T> LowerHex for &'a mut T where
T: LowerHex + ?Sized,impl LowerHex for NonZeroUsizeimpl LowerHex for u8impl LowerHex for i16impl LowerHex for i32