Trait alloc::fmt::UpperHex 1.0.0
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pub trait UpperHex {
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>;
}X formatting.
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
Implementations on Foreign Types
impl<T> UpperHex for Wrapping<T> where
T: UpperHex, [src]
T: UpperHex,
Implementors
impl UpperHex for i64impl UpperHex for i16impl UpperHex for u8impl UpperHex for i32impl UpperHex for i128impl UpperHex for i8impl UpperHex for u64impl UpperHex for u32impl UpperHex for u128impl UpperHex for usizeimpl<'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 isizeimpl UpperHex for u16