Trait alloc::fmt::UpperHex 1.0.0[−][src]
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; 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 UpperHex for NonZeroU128[src]
impl UpperHex for NonZeroU128impl<T> UpperHex for Wrapping<T> where
T: UpperHex, [src]
impl<T> UpperHex for Wrapping<T> where
T: UpperHex, impl UpperHex for NonZeroU64[src]
impl UpperHex for NonZeroU64impl UpperHex for NonZeroU8[src]
impl UpperHex for NonZeroU8impl UpperHex for NonZeroUsize[src]
impl UpperHex for NonZeroUsizeimpl UpperHex for NonZeroU32[src]
impl UpperHex for NonZeroU32impl UpperHex for NonZeroU16[src]
impl UpperHex for NonZeroU16Implementors
impl UpperHex for i8impl UpperHex for u128impl UpperHex for u32impl UpperHex for i32impl UpperHex for i64impl UpperHex for isizeimpl UpperHex for i128impl UpperHex for u16impl UpperHex for u8impl UpperHex for i16impl UpperHex for u64impl<'a, T> UpperHex for &'a mut T where
T: UpperHex + ?Sized,impl<'a, T> UpperHex for &'a T where
T: UpperHex + ?Sized,impl UpperHex for usize