Trait 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 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§

1.0.0 · Source

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.

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impl UpperHex for SettingId

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impl UpperHex for CertificateCompressionAlgorithm

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impl UpperHex for CipherSuite

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impl UpperHex for CompressionAlgorithm

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impl UpperHex for ECPointFormat

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impl UpperHex for ExtensionId

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impl UpperHex for rama::net::tls::ProtocolVersion

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impl UpperHex for SignatureScheme

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impl UpperHex for SupportedGroup

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impl UpperHex for AddressType

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impl UpperHex for Command

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impl UpperHex for rama::proxy::socks5::proto::ProtocolVersion

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impl UpperHex for ReplyKind

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impl UpperHex for SocksMethod

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impl UpperHex for UsernamePasswordSubnegotiationVersion

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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 Bytes

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impl UpperHex for BytesMut

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impl UpperHex for Ja3

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impl UpperHex for ShutdownState

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impl UpperHex for SslMode

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impl UpperHex for SslOptions

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impl UpperHex for SslSessionCacheMode

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impl UpperHex for SslVerifyMode

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impl UpperHex for X509CheckFlags

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impl UpperHex for X509VerifyFlags

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impl UpperHex for BigInt

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impl UpperHex for BigUint

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impl UpperHex for Braced

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impl UpperHex for Hyphenated

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impl UpperHex for Simple

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impl UpperHex for Urn

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impl UpperHex for Uuid

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impl UpperHex for Digest

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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<'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<O> UpperHex for I16<O>
where O: ByteOrder,

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impl<O> UpperHex for I32<O>
where O: ByteOrder,

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impl<O> UpperHex for I64<O>
where O: ByteOrder,

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impl<O> UpperHex for I128<O>
where O: ByteOrder,

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impl<O> UpperHex for Isize<O>
where O: ByteOrder,

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impl<O> UpperHex for U16<O>
where O: ByteOrder,

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impl<O> UpperHex for U32<O>
where O: ByteOrder,

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impl<O> UpperHex for U64<O>
where O: ByteOrder,

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impl<O> UpperHex for U128<O>
where O: ByteOrder,

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impl<O> UpperHex for Usize<O>
where O: ByteOrder,

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

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

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impl<T> UpperHex for NonZero<T>

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

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

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

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impl<const MIN: i8, const MAX: i8> UpperHex for RangedI8<MIN, MAX>

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impl<const MIN: i16, const MAX: i16> UpperHex for RangedI16<MIN, MAX>

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impl<const MIN: i32, const MAX: i32> UpperHex for RangedI32<MIN, MAX>

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impl<const MIN: i64, const MAX: i64> UpperHex for RangedI64<MIN, MAX>

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impl<const MIN: i128, const MAX: i128> UpperHex for RangedI128<MIN, MAX>

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impl<const MIN: isize, const MAX: isize> UpperHex for RangedIsize<MIN, MAX>

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impl<const MIN: u8, const MAX: u8> UpperHex for RangedU8<MIN, MAX>

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impl<const MIN: u16, const MAX: u16> UpperHex for RangedU16<MIN, MAX>

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impl<const MIN: u32, const MAX: u32> UpperHex for RangedU32<MIN, MAX>

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impl<const MIN: u64, const MAX: u64> UpperHex for RangedU64<MIN, MAX>

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impl<const MIN: u128, const MAX: u128> UpperHex for RangedU128<MIN, MAX>

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impl<const MIN: usize, const MAX: usize> UpperHex for RangedUsize<MIN, MAX>