Trait core::fmt::UpperHex
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[src]
pub trait UpperHex {
fn fmt(&self, &mut Formatter) -> Result;
}Format trait for the X character.
The UpperHex trait should format its output as a number in hexadecimal, with A through F
in upper case.
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");
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
Implementors
impl UpperHex for isizeimpl UpperHex for usizeimpl UpperHex for i8impl UpperHex for u8impl UpperHex for i16impl UpperHex for u16impl UpperHex for i32impl UpperHex for u32impl UpperHex for i64impl UpperHex for u64impl<'a, T: ?Sized + UpperHex> UpperHex for &'a Timpl<'a, T: ?Sized + UpperHex> UpperHex for &'a mut T