Trait alloc::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");
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);
Required Methods
Implementations on Foreign Types
impl LowerHex for NonZeroU64[src]
impl LowerHex for NonZeroU64impl<T> LowerHex for Wrapping<T> where
T: LowerHex, [src]
impl<T> LowerHex for Wrapping<T> where
T: LowerHex, impl LowerHex for NonZeroU16[src]
impl LowerHex for NonZeroU16impl LowerHex for NonZeroU128[src]
impl LowerHex for NonZeroU128impl LowerHex for NonZeroU8[src]
impl LowerHex for NonZeroU8impl LowerHex for NonZeroU32[src]
impl LowerHex for NonZeroU32impl LowerHex for NonZeroUsize[src]
impl LowerHex for NonZeroUsizeImplementors
impl LowerHex for u128impl LowerHex for usizeimpl<'a, T> LowerHex for &'a T where
T: LowerHex + ?Sized,impl LowerHex for u16impl LowerHex for i128impl LowerHex for i8impl LowerHex for isizeimpl LowerHex for u64impl LowerHex for u32impl LowerHex for i64impl<'a, T> LowerHex for &'a mut T where
T: LowerHex + ?Sized,impl LowerHex for u8impl LowerHex for i16impl LowerHex for i32