1.0.0[−][src]Trait alloc::fmt::UpperHex
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; fmt::UpperHex::fmt(&val, f) // delegate to i32's implementation } } let l = Length(i32::max_value()); assert_eq!(format!("l as hex is: {:X}", l), "l as hex is: 7FFFFFFF"); assert_eq!(format!("l as hex is: {:#010X}", l), "l as hex is: 0x7FFFFFFF");Run
Required methods
Loading content...Implementations on Foreign Types
impl UpperHex for NonZeroIsize[src]
impl UpperHex for NonZeroU128[src]
impl UpperHex for NonZeroU64[src]
impl UpperHex for NonZeroI128[src]
impl UpperHex for NonZeroI8[src]
impl<T> UpperHex for Wrapping<T> where
T: UpperHex, [src]
T: UpperHex,
impl UpperHex for NonZeroI64[src]
impl UpperHex for NonZeroI32[src]
impl UpperHex for NonZeroU16[src]
impl UpperHex for NonZeroUsize[src]
impl UpperHex for NonZeroU32[src]
impl UpperHex for NonZeroI16[src]
impl UpperHex for NonZeroU8[src]
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Implementors
impl UpperHex for i8[src]
impl UpperHex for i16[src]
impl UpperHex for i32[src]
impl UpperHex for i64[src]
impl UpperHex for i128[src]
impl UpperHex for isize[src]
impl UpperHex for u8[src]
impl UpperHex for u16[src]
impl UpperHex for u32[src]
impl UpperHex for u64[src]
impl UpperHex for u128[src]
impl UpperHex for usize[src]
impl<'_, T> UpperHex for &'_ T where
T: UpperHex + ?Sized, [src]
T: UpperHex + ?Sized,
impl<'_, T> UpperHex for &'_ mut T where
T: UpperHex + ?Sized, [src]
T: UpperHex + ?Sized,