Trait alloc::fmt::LowerHex 1.0.0[−][src]
x formatting.
The LowerHex trait should format its output as a number in hexadecimal, with a through f
in lower 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 LowerHex on a type:
use std::fmt; struct Length(i32); impl fmt::LowerHex 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 LowerHex for NonZeroUsize[src]
impl LowerHex for NonZeroUsizeimpl LowerHex for NonZeroU32[src]
impl LowerHex for NonZeroU32impl LowerHex for NonZeroI32[src]
impl LowerHex for NonZeroI32impl LowerHex for NonZeroU64[src]
impl LowerHex for NonZeroU64impl LowerHex for NonZeroI64[src]
impl LowerHex for NonZeroI64impl LowerHex for NonZeroU16[src]
impl LowerHex for NonZeroU16impl LowerHex for NonZeroI16[src]
impl LowerHex for NonZeroI16impl LowerHex for NonZeroIsize[src]
impl LowerHex for NonZeroIsizeimpl LowerHex for NonZeroU128[src]
impl LowerHex for NonZeroU128impl LowerHex for NonZeroU8[src]
impl LowerHex for NonZeroU8impl LowerHex for NonZeroI128[src]
impl LowerHex for NonZeroI128impl<T> LowerHex for Wrapping<T> where
T: LowerHex, [src]
impl<T> LowerHex for Wrapping<T> where
T: LowerHex, impl LowerHex for NonZeroI8[src]
impl LowerHex for NonZeroI8Implementors
impl<'a, T> LowerHex for &'a T where
T: LowerHex + ?Sized,impl<'a, T> LowerHex for &'a mut T where
T: LowerHex + ?Sized,impl LowerHex for usizeimpl LowerHex for u32impl LowerHex for i64impl LowerHex for i8impl LowerHex for i16impl LowerHex for isizeimpl LowerHex for u64impl LowerHex for i128impl LowerHex for u8impl LowerHex for u128impl LowerHex for i32impl LowerHex for u16