Trait core::fmt::UpperHex 1.0.0
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[src]
pub trait UpperHex {
fn fmt(&self, f: &mut Formatter) -> Result;
}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");Run
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);Run
Required Methods
Implementors
impl<T: UpperHex> UpperHex for Wrapping<T>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 UpperHex for i128impl UpperHex for u128impl<'a, T: ?Sized + UpperHex> UpperHex for &'a Timpl<'a, T: ?Sized + UpperHex> UpperHex for &'a mut T