Trait UpperHex 

pub trait UpperHex {
    // Required method
    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 y = 42; // 42 is '2A' in hex

assert_eq!(format!("{y:X}"), "2A");
assert_eq!(format!("{y:#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;

        fmt::UpperHex::fmt(&val, f) // delegate to i32's implementation
    }
}

let l = Length(i32::MAX);

assert_eq!(format!("l as hex is: {l:X}"), "l as hex is: 7FFFFFFF");

assert_eq!(format!("l as hex is: {l:#010X}"), "l as hex is: 0x7FFFFFFF");

Required Methods

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

Errors

This function should return Err if, and only if, the provided Formatter returns Err. String formatting is considered an infallible operation; this function only returns a Result because writing to the underlying stream might fail and it must provide a way to propagate the fact that an error has occurred back up the stack.

Implementors

impl UpperHex for i8

impl UpperHex for i16

impl UpperHex for i32

impl UpperHex for i64

impl UpperHex for i128

impl UpperHex for isize

impl UpperHex for u8

impl UpperHex for u16

impl UpperHex for u32

impl UpperHex for u64

impl UpperHex for u128

impl UpperHex for usize

impl UpperHex for DrawFlags

impl UpperHex for DrawListFlags

impl UpperHex for BackendFlags

impl UpperHex for ButtonFlags

impl UpperHex for ColorEditFlags

impl UpperHex for ComboBoxFlags

impl UpperHex for ConfigFlags

impl UpperHex for DragDropFlags

impl UpperHex for FontAtlasFlags

impl UpperHex for InputTextCallback

impl UpperHex for InputTextFlags

impl UpperHex for InputTextMultilineCallback

impl UpperHex for ItemHoveredFlags

impl UpperHex for JoystickHats

impl UpperHex for Modifiers

impl UpperHex for SelectableFlags

impl UpperHex for SliderFlags

impl UpperHex for TabBarFlags

impl UpperHex for TabItemFlags

impl UpperHex for TreeNodeFlags

impl UpperHex for WindowFlags

impl UpperHex for WindowFocusedFlags

impl UpperHex for WindowHoveredFlags

impl UpperHex for bf16

Available on non-target_arch=spirv only.

impl UpperHex for f16

Available on non-target_arch=spirv only.

impl UpperHex for BigInt

impl UpperHex for BigUint

impl UpperHex for Transformations

impl<'a, I> UpperHex for Format<'a, I>

where I: Iterator, <I as Iterator>::Item: UpperHex,

impl<O> UpperHex for I16<O>

where O: ByteOrder,

impl<O> UpperHex for I32<O>

where O: ByteOrder,

impl<O> UpperHex for I64<O>

where O: ByteOrder,

impl<O> UpperHex for I128<O>

where O: ByteOrder,

impl<O> UpperHex for Isize<O>

where O: ByteOrder,

impl<O> UpperHex for U16<O>

where O: ByteOrder,

impl<O> UpperHex for U32<O>

where O: ByteOrder,

impl<O> UpperHex for U64<O>

where O: ByteOrder,

impl<O> UpperHex for U128<O>

where O: ByteOrder,

impl<O> UpperHex for Usize<O>

where O: ByteOrder,

impl<T> UpperHex for &T

where T: UpperHex + ?Sized,

impl<T> UpperHex for &mut T

where T: UpperHex + ?Sized,

impl<T> UpperHex for NonZero<T>

where T: ZeroablePrimitive + UpperHex,

impl<T> UpperHex for Saturating<T>

where T: UpperHex,

impl<T> UpperHex for Wrapping<T>

where T: UpperHex,

impl<T> UpperHex for Ratio<T>

where T: UpperHex + Clone + Integer,

impl<T> UpperHex for Bgr<T>

where T: UpperHex,

impl<T> UpperHex for Rgb<T>

where T: UpperHex,