Struct FixedBuf 

pub struct FixedBuf<const N: usize> { /* private fields */ }

Stack-backed fixed-capacity buffer with 8-byte alignment.

FixedBuf<N> provides N bytes of inline storage with no heap allocation, enabling nearest regions in no_std environments or on the stack.

Panics

reserve and resize panic if the requested size exceeds N.

Implementations

impl<const N: usize> FixedBuf<N>

pub const fn new() -> Self

Create an empty fixed buffer.

This is const, enabling static regions.

Trait Implementations

impl<const N: usize> Buf for FixedBuf<N>

const ALIGN: usize = 8

Buffer alignment guarantee.

fn empty() -> Self

Create an empty buffer (len = 0).

fn as_ptr(&self) -> *const u8

Raw pointer to the buffer start.

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

Mutable raw pointer to the buffer start.

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

View the buffer contents as a byte slice.

fn len(&self) -> u32

Current byte length.

fn capacity(&self) -> u32

Current capacity in bytes.

fn resize(&mut self, new_len: u32, fill: u8)

Grow or shrink the buffer, filling new bytes with fill.

fn reserve(&mut self, additional: u32)

Ensure at least additional bytes of spare capacity.

fn extend_from_slice(&mut self, data: &[u8])

Append bytes from a slice.

fn is_empty(&self) -> bool

Returns true if the buffer contains no bytes.

fn align_to(&mut self, align: usize)

Pad len up to the next multiple of align.

fn alloc<U: Flat>(&mut self) -> Pos

Align + allocate space for one U, return its position.

fn expose_provenance(&self)

Expose provenance so Near::get can recover it via with_exposed_provenance.

impl<const N: usize> Clone for FixedBuf<N>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<const N: usize> Default for FixedBuf<N>

fn default() -> Self

Returns the “default value” for a type.

impl<const N: usize> Send for FixedBuf<N>

impl<const N: usize> Sync for FixedBuf<N>