devela::text::fmt

Trait LowerHex

1.0.0 · Source

pub trait LowerHex {
    // Required method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> ⓘ;
}

Expand description

core x formatting.

Re-exported from core::fmt:: .

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 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 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: {l:x}"), "l as hex is: 9");

assert_eq!(format!("l as hex is: {l:#010x}"), "l as hex is: 0x00000009");

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.

Implementors§

1.0.0 · Source§

impl LowerHex for i8

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impl LowerHex for i16

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impl LowerHex for i32

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impl LowerHex for i64

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impl LowerHex for i128

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impl LowerHex for isize

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impl LowerHex for u8

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impl LowerHex for u16

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impl LowerHex for u32

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impl LowerHex for u64

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impl LowerHex for u128

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impl LowerHex for usize

impl LowerHex for KeyEventState

impl LowerHex for KeyModifiers

impl LowerHex for KeyboardEnhancementFlags

impl LowerHex for BigInt

impl LowerHex for NonZeroI16_be

impl LowerHex for NonZeroI16_le

impl LowerHex for NonZeroI32_be

impl LowerHex for NonZeroI32_le

impl LowerHex for NonZeroI64_be

impl LowerHex for NonZeroI64_le

impl LowerHex for NonZeroI128_be

impl LowerHex for NonZeroI128_le

impl LowerHex for NonZeroU16_be

impl LowerHex for NonZeroU16_le

impl LowerHex for NonZeroU32_be

impl LowerHex for NonZeroU32_le

impl LowerHex for NonZeroU64_be

impl LowerHex for NonZeroU64_le

impl LowerHex for NonZeroU128_be

impl LowerHex for NonZeroU128_le

impl LowerHex for i16_be

impl LowerHex for i16_le

impl LowerHex for i32_be

impl LowerHex for i32_le

impl LowerHex for i64_be

impl LowerHex for i64_le

impl LowerHex for i128_be

impl LowerHex for i128_le

impl LowerHex for u16_be

impl LowerHex for u16_le

impl LowerHex for u32_be

impl LowerHex for u32_le

impl LowerHex for u64_be

impl LowerHex for u64_le

impl LowerHex for u128_be

impl LowerHex for u128_le

impl LowerHex for NonZeroI16_ube

impl LowerHex for NonZeroI16_ule

impl LowerHex for NonZeroI32_ube

impl LowerHex for NonZeroI32_ule

impl LowerHex for NonZeroI64_ube

impl LowerHex for NonZeroI64_ule

impl LowerHex for NonZeroI128_ube

impl LowerHex for NonZeroI128_ule

impl LowerHex for NonZeroU16_ube

impl LowerHex for NonZeroU16_ule

impl LowerHex for NonZeroU32_ube

impl LowerHex for NonZeroU32_ule

impl LowerHex for NonZeroU64_ube

impl LowerHex for NonZeroU64_ule

impl LowerHex for NonZeroU128_ube

impl LowerHex for NonZeroU128_ule

impl LowerHex for i16_ube

impl LowerHex for i16_ule

impl LowerHex for i32_ube

impl LowerHex for i32_ule

impl LowerHex for i64_ube

impl LowerHex for i64_ule

impl LowerHex for i128_ube

impl LowerHex for i128_ule

impl LowerHex for u16_ube

impl LowerHex for u16_ule

impl LowerHex for u32_ube

impl LowerHex for u32_ule

impl LowerHex for u64_ube

impl LowerHex for u64_ule

impl LowerHex for u128_ube

impl LowerHex for u128_ule

impl LowerHex for devela::_dep::rustix::event::epoll::CreateFlags

impl LowerHex for EventfdFlags

impl LowerHex for PollFlags

impl LowerHex for devela::_dep::rustix::fs::inotify::CreateFlags

impl LowerHex for ReadFlags

impl LowerHex for WatchFlags

impl LowerHex for Access

impl LowerHex for AtFlags

impl LowerHex for FallocateFlags

impl LowerHex for FdFlags

impl LowerHex for IFlags

impl LowerHex for MemfdFlags

impl LowerHex for Mode

impl LowerHex for MountFlags

impl LowerHex for MountPropagationFlags

impl LowerHex for OFlags

impl LowerHex for RenameFlags

impl LowerHex for ResolveFlags

impl LowerHex for SealFlags

impl LowerHex for StatVfsMountFlags

impl LowerHex for StatxFlags

impl LowerHex for UnmountFlags

impl LowerHex for XattrFlags

impl LowerHex for DupFlags

impl LowerHex for ReadWriteFlags

impl LowerHex for EventFlags

impl LowerHex for IoringAcceptFlags

impl LowerHex for IoringAsyncCancelFlags

impl LowerHex for IoringCqFlags

impl LowerHex for IoringCqeFlags

impl LowerHex for IoringEnterFlags

impl LowerHex for IoringFeatureFlags

impl LowerHex for IoringFsyncFlags

impl LowerHex for IoringMsgringFlags

impl LowerHex for IoringOpFlags

impl LowerHex for IoringPollFlags

impl LowerHex for IoringRecvFlags

impl LowerHex for IoringRegisterFlags

impl LowerHex for IoringRsrcFlags

impl LowerHex for IoringSendFlags

impl LowerHex for IoringSetupFlags

impl LowerHex for IoringSqFlags

impl LowerHex for IoringSqeFlags

impl LowerHex for IoringTimeoutFlags

impl LowerHex for RecvFlags

impl LowerHex for RecvmsgOutFlags

impl LowerHex for SendFlags

impl LowerHex for SocketFlags

impl LowerHex for devela::_dep::rustix::io_uring::SpliceFlags

impl LowerHex for MapFlags

impl LowerHex for MlockAllFlags

impl LowerHex for MlockFlags

impl LowerHex for MprotectFlags

impl LowerHex for MremapFlags

impl LowerHex for MsyncFlags

impl LowerHex for ProtFlags

impl LowerHex for UserfaultfdFlags

impl LowerHex for FsMountFlags

impl LowerHex for FsOpenFlags

impl LowerHex for FsPickFlags

impl LowerHex for MountAttrFlags

impl LowerHex for MoveMountFlags

impl LowerHex for OpenTreeFlags

impl LowerHex for SockaddrXdpFlags

impl LowerHex for XdpDescOptions

impl LowerHex for XdpOptionsFlags

impl LowerHex for XdpRingFlags

impl LowerHex for XdpUmemRegFlags

impl LowerHex for PipeFlags

impl LowerHex for devela::_dep::rustix::pipe::SpliceFlags

impl LowerHex for FloatingPointEmulationControl

impl LowerHex for FloatingPointExceptionMode

impl LowerHex for MembarrierQuery

impl LowerHex for PidfdFlags

impl LowerHex for PidfdGetfdFlags

impl LowerHex for SpeculationFeatureControl

impl LowerHex for SpeculationFeatureState

impl LowerHex for UnalignedAccessControl

impl LowerHex for WaitOptions

impl LowerHex for WaitidOptions

impl LowerHex for OpenptFlags

impl LowerHex for GetRandomFlags

impl LowerHex for ShmOFlags

impl LowerHex for ControlModes

impl LowerHex for InputModes

impl LowerHex for LocalModes

impl LowerHex for OutputModes

impl LowerHex for CapabilitiesSecureBits

impl LowerHex for CapabilityFlags

impl LowerHex for devela::_dep::rustix::thread::FutexFlags

impl LowerHex for TaggedAddressMode

impl LowerHex for ThreadNameSpaceType

impl LowerHex for UnshareFlags

impl LowerHex for TimerfdFlags

impl LowerHex for TimerfdTimerFlags

impl LowerHex for Channels

impl LowerHex for f32x4

impl LowerHex for f32x8

impl LowerHex for f64x2

impl LowerHex for f64x4

impl LowerHex for i8x16

impl LowerHex for i8x32

impl LowerHex for i16x8

impl LowerHex for i16x16

impl LowerHex for i32x4

impl LowerHex for i32x8

impl LowerHex for i64x2

impl LowerHex for i64x4

impl LowerHex for u8x16

impl LowerHex for u16x8

impl LowerHex for u16x16

impl LowerHex for u32x4

impl LowerHex for u32x8

impl LowerHex for u64x2

impl LowerHex for u64x4

impl LowerHex for devela::_dep::winnow::Bytes

impl LowerHex for ExampleBitfield

Available on crate feature _bit_u8 and doc only.

impl LowerHex for ExampleBitfieldCustom

Available on crate feature _bit_u8 and doc only.

impl LowerHex for ExampleBitfieldExtra

Available on crate feature _bit_u8 and doc only.

impl LowerHex for ExampleEnumSet

Available on doc only.

impl LowerHex for m128

impl LowerHex for m128d

impl LowerHex for m128i

impl LowerHex for m256

impl LowerHex for m256d

impl LowerHex for m256i

impl LowerHex for char7

impl LowerHex for char8

impl LowerHex for char16

impl LowerHex for Bytes

impl LowerHex for BytesMut

impl LowerHex for Flags

impl LowerHex for PortCap

impl LowerHex for PortType

impl LowerHex for Remove

impl<'t, T, F, U> LowerHex for OptionFmtOrElse<'t, T, F>
where T: LowerHex, F: Fn() -> U, U: Display,

impl<'t, T, U> LowerHex for OptionFmtOr<'t, T, U>
where T: LowerHex, U: Display,

impl<BUF: DstBuf, DST> LowerHex for DstValue<DST, BUF>
where DST: LowerHex + ?Sized,

Available on crate feature unsafe_layout only.

1.0.0 · Source§

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

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

1.28.0 · Source§

impl<T> LowerHex for NonZero<T>
where T: ZeroablePrimitive + LowerHex,

impl<T> LowerHex for OptionFmt<'_, T>
where T: LowerHex,

1.74.0 · Source§

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

1.11.0 · Source§

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

impl<T: LowerHex> LowerHex for Bitwise<T>

impl<T: LowerHex> LowerHex for Frac<T>

impl<T: LowerHex> LowerHex for Int<T>

impl<const V: i8> LowerHex for devela::_info::examples::niche::NonValueI8<V>

Available on doc only.

impl<const V: i8> LowerHex for devela::all::NonValueI8<V>

impl<const V: u8> LowerHex for NonValueU8<V>

impl<const V: u16> LowerHex for NonValueU16<V>