Trait alloc::fmt::UpperHex 1.0.0
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[src]
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.
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<T> UpperHex for Wrapping<T> where
T: UpperHex, [src]
T: UpperHex,
Implementors
impl UpperHex for i32impl UpperHex for i64impl UpperHex for isizeimpl UpperHex for u8impl UpperHex for u128impl UpperHex for i128impl UpperHex for usizeimpl UpperHex for u64impl<'a, T> UpperHex for &'a T where
T: UpperHex + ?Sized,impl UpperHex for i8impl UpperHex for i16impl UpperHex for u16impl UpperHex for u32impl<'a, T> UpperHex for &'a mut T where
T: UpperHex + ?Sized,