1.0.0[−][src]Trait nom::lib::std::fmt::LowerHex
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; fmt::LowerHex::fmt(&val, f) // delegate to i32's implementation } } let l = Length(9); assert_eq!(format!("l as hex is: {:x}", l), "l as hex is: 9"); assert_eq!(format!("l as hex is: {:#010x}", l), "l as hex is: 0x00000009");
Required methods
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>[−]
Formats the value using the given formatter.
Implementations on Foreign Types
impl LowerHex for NonZeroI64[src][−]
impl LowerHex for NonZeroIsize[src][−]
impl<T> LowerHex for Wrapping<T> where
T: LowerHex, [src][−]
T: LowerHex,
impl<'_, T> LowerHex for &'_ T where
T: LowerHex + ?Sized, [src][−]
T: LowerHex + ?Sized,
impl LowerHex for i32[src][−]
impl LowerHex for u64[src][−]
impl LowerHex for NonZeroI128[src][−]
impl LowerHex for u32[src][−]
impl LowerHex for u16[src][−]
impl LowerHex for u128[src][−]
impl LowerHex for NonZeroI8[src][−]
impl LowerHex for NonZeroI32[src][−]
impl LowerHex for NonZeroU32[src][−]
impl LowerHex for NonZeroU8[src][−]
impl LowerHex for NonZeroU16[src][−]
impl<'_, T> LowerHex for &'_ mut T where
T: LowerHex + ?Sized, [src][−]
T: LowerHex + ?Sized,