forge::revm::interpreter::primitives::alloy_primitives::hex

Struct Buffer

#[repr(C)]
pub struct Buffer<const N: usize, const PREFIX: bool = false> { prefix: [u8; 2], bytes: [[u8; 2]; N], }
Expand description

A correctly sized stack allocation for the formatted bytes to be written into.

N is the amount of bytes of the input, while PREFIX specifies whether the “0x” prefix is prepended to the output.

Note that this buffer will contain only the prefix, if specified, and null (‘\0’) bytes before any formatting is done.

§Examples

let mut buffer = const_hex::Buffer::<4>::new();
let printed = buffer.format(b"1234");
assert_eq!(printed, "31323334");

Fields§

§prefix: [u8; 2]§bytes: [[u8; 2]; N]

Implementations§

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impl<const N: usize, const PREFIX: bool> Buffer<N, PREFIX>

pub const LEN: usize = _

The length of the buffer in bytes.

pub const fn new() -> Buffer<N, PREFIX>

This is a cheap operation; you don’t need to worry about reusing buffers for efficiency.

pub const fn const_format(self, array: &[u8; N]) -> Buffer<N, PREFIX>

Print an array of bytes into this buffer.

pub const fn const_format_upper(self, array: &[u8; N]) -> Buffer<N, PREFIX>

Print an array of bytes into this buffer.

pub fn format(&mut self, array: &[u8; N]) -> &mut str

Print an array of bytes into this buffer and return a reference to its lower hex string representation within the buffer.

pub fn format_upper(&mut self, array: &[u8; N]) -> &mut str

Print an array of bytes into this buffer and return a reference to its upper hex string representation within the buffer.

pub fn format_slice<T>(&mut self, slice: T) -> &mut str
where T: AsRef<[u8]>,

Print a slice of bytes into this buffer and return a reference to its lower hex string representation within the buffer.

§Panics

If the slice is not exactly N bytes long.

pub fn format_slice_upper<T>(&mut self, slice: T) -> &mut str
where T: AsRef<[u8]>,

Print a slice of bytes into this buffer and return a reference to its upper hex string representation within the buffer.

§Panics

If the slice is not exactly N bytes long.

pub fn to_string(&self) -> String

Available on crate feature alloc only.

Copies self into a new owned String.

pub const fn as_str(&self) -> &str

Returns a reference to the underlying bytes casted to a string slice.

pub fn as_mut_str(&mut self) -> &mut str

Returns a mutable reference to the underlying bytes casted to a string slice.

pub fn to_vec(&self) -> Vec<u8>

Available on crate feature alloc only.

Copies self into a new Vec.

pub const fn as_byte_array<const LEN: usize>(&self) -> &[u8; LEN]

Returns a reference the underlying stack-allocated byte array.

§Panics

If LEN does not equal Self::LEN.

This is panic is evaluated at compile-time if the nightly feature is enabled, as inline const blocks are currently unstable.

See Rust tracking issue #76001.

pub fn as_mut_byte_array<const LEN: usize>(&mut self) -> &mut [u8; LEN]

Returns a mutable reference the underlying stack-allocated byte array.

§Panics

If LEN does not equal Self::LEN.

See as_byte_array for more information.

pub const fn as_bytes(&self) -> &[u8]

Returns a reference to the underlying bytes.

pub unsafe fn as_mut_bytes(&mut self) -> &mut [u8]

Returns a mutable reference to the underlying bytes.

§Safety

The caller must ensure that the content of the slice is valid UTF-8 before the borrow ends and the underlying str is used.

Use of a str whose contents are not valid UTF-8 is undefined behavior.

pub unsafe fn buffer(&mut self) -> &mut [u8]

Returns a mutable reference to the underlying buffer, excluding the prefix.

§Safety

See as_mut_bytes.

pub const fn as_ptr(&self) -> *const u8

Returns a raw pointer to the buffer.

The caller must ensure that the buffer outlives the pointer this function returns, or else it will end up pointing to garbage.

pub fn as_mut_ptr(&mut self) -> *mut u8

Returns an unsafe mutable pointer to the slice’s buffer.

The caller must ensure that the slice outlives the pointer this function returns, or else it will end up pointing to garbage.

Trait Implementations§

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impl<const N: usize, const PREFIX: bool> Clone for Buffer<N, PREFIX>

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fn clone(&self) -> Buffer<N, PREFIX>

Returns a copy of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<const N: usize, const PREFIX: bool> Debug for Buffer<N, PREFIX>

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

Formats the value using the given formatter. Read more
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impl<const N: usize, const PREFIX: bool> Default for Buffer<N, PREFIX>

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fn default() -> Buffer<N, PREFIX>

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<const N: usize, const PREFIX: bool> Freeze for Buffer<N, PREFIX>

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impl<const N: usize, const PREFIX: bool> RefUnwindSafe for Buffer<N, PREFIX>

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impl<const N: usize, const PREFIX: bool> Send for Buffer<N, PREFIX>

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impl<const N: usize, const PREFIX: bool> Sync for Buffer<N, PREFIX>

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impl<const N: usize, const PREFIX: bool> Unpin for Buffer<N, PREFIX>

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impl<const N: usize, const PREFIX: bool> UnwindSafe for Buffer<N, PREFIX>

Blanket Implementations§

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where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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Mutably borrows from an owned value. Read more
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where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T, R> CollectAndApply<T, R> for T

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where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryClone for T
where T: Clone,

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fn try_clone(&self) -> Result<T, Error>

Clones self, possibly returning an error.
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.