Trait frame_support::dispatch::fmt::UpperHex

1.0.0 · source ·
pub trait UpperHex {
    // Required method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}
Expand description

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");

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§

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

Formats the value using the given formatter.

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impl UpperHex for i8

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impl UpperHex for i16

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impl UpperHex for i32

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impl UpperHex for i64

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impl UpperHex for i128

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impl UpperHex for isize

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impl UpperHex for u8

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impl UpperHex for u16

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impl UpperHex for u32

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impl UpperHex for u64

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impl UpperHex for u128

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impl UpperHex for usize

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impl UpperHex for Capabilities

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impl UpperHex for WithdrawReasons

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impl UpperHex for NonZeroI8

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impl UpperHex for NonZeroI16

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impl UpperHex for NonZeroI32

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impl UpperHex for NonZeroI64

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impl UpperHex for NonZeroI128

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impl UpperHex for NonZeroIsize

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impl UpperHex for NonZeroU8

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impl UpperHex for NonZeroU16

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impl UpperHex for NonZeroU32

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impl UpperHex for NonZeroU64

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impl UpperHex for NonZeroU128

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impl UpperHex for NonZeroUsize

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impl UpperHex for num_bigint::bigint::BigInt

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impl UpperHex for BigUint

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impl UpperHex for Access

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impl UpperHex for Access

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impl UpperHex for AtFlags

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impl UpperHex for AtFlags

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impl UpperHex for Bytes

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impl UpperHex for BytesMut

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impl UpperHex for CloneFlags

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impl UpperHex for CloneFlags

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impl UpperHex for CopyfileFlags

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impl UpperHex for CopyfileFlags

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impl UpperHex for DupFlags

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impl UpperHex for DupFlags

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impl UpperHex for EventFlags

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impl UpperHex for FallocateFlags

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impl UpperHex for FallocateFlags

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impl UpperHex for FdFlags

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impl UpperHex for FdFlags

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impl UpperHex for H128

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impl UpperHex for H160

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impl UpperHex for H256

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impl UpperHex for H384

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impl UpperHex for H512

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impl UpperHex for H768

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impl UpperHex for HexDisplay<'_>

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impl UpperHex for Limb

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impl UpperHex for MapFlags

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impl UpperHex for Mnemonic

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impl UpperHex for Mode

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impl UpperHex for Mode

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impl UpperHex for MprotectFlags

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impl UpperHex for MsyncFlags

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impl UpperHex for OFlags

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impl UpperHex for OFlags

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impl UpperHex for PollFlags

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impl UpperHex for PollFlags

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impl UpperHex for ProtFlags

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impl UpperHex for Seed

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impl UpperHex for Signature

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impl UpperHex for StatVfsMountFlags

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impl UpperHex for StatVfsMountFlags

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impl UpperHex for U128

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impl UpperHex for U256

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impl UpperHex for U512

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impl UpperHex for UserFlags

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impl UpperHex for VnodeEvents

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impl UpperHex for WaitOptions

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impl UpperHex for XattrFlags

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impl<'a, I> UpperHex for Format<'a, I>where I: Iterator, <I as Iterator>::Item: UpperHex,

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impl<'a, T> UpperHex for StyledValue<'a, T>where T: UpperHex,

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impl<'s, T> UpperHex for SliceVec<'s, T>where T: UpperHex,

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impl<A> UpperHex for ArrayVec<A>where A: Array, <A as Array>::Item: UpperHex,

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impl<A> UpperHex for TinyVec<A>where A: Array, <A as Array>::Item: UpperHex,

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impl<C> UpperHex for NonZeroScalar<C>where C: CurveArithmetic,

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impl<C> UpperHex for ScalarPrimitive<C>where C: Curve,

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impl<C> UpperHex for Signature<C>where C: PrimeCurve, <<C as Curve>::FieldBytesSize as Add<<C as Curve>::FieldBytesSize>>::Output: ArrayLength<u8>,

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impl<Size> UpperHex for EncodedPoint<Size>where Size: ModulusSize,

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impl<T> UpperHex for &Twhere T: UpperHex + ?Sized,

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impl<T> UpperHex for &mut Twhere T: UpperHex + ?Sized,

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impl<T> UpperHex for Saturating<T>where T: UpperHex,

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impl<T> UpperHex for core::num::wrapping::Wrapping<T>where T: UpperHex,

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impl<T> UpperHex for GenericArray<u8, T>where T: ArrayLength<u8> + Add<T>, <T as Add<T>>::Output: ArrayLength<u8>,

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impl<T> UpperHex for GenericArray<u8, T>where T: ArrayLength<u8> + Add<T>, <T as Add<T>>::Output: ArrayLength<u8>,

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impl<T> UpperHex for NonZero<T>where T: UpperHex + Zero,

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impl<T> UpperHex for Wrapping<T>where T: UpperHex,

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impl<T, const LANES: usize> UpperHex for Simd<T, LANES>where LaneCount<LANES>: SupportedLaneCount, T: SimdElement + UpperHex,

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impl<const LIMBS: usize> UpperHex for Uint<LIMBS>

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impl<const N: usize> UpperHex for BigInt<N>