Struct FmtBuffer 

pub struct FmtBuffer<const N: usize> {
    buf: [u8; N],
    pos: usize,
}

Stack-allocated, fixed-size [core::fmt::Write] buffer for no-alloc contexts (interrupt handlers, panic path). Writes beyond capacity N are silently dropped.

Fields

buf: [u8; N]

pos: usize

Implementations

impl<const N: usize> FmtBuffer<N>

pub fn new() -> Self

Create an empty buffer with all bytes zeroed.

pub fn as_str(&self) -> &str

Return the bytes written so far as a &str (empty on invalid UTF-8).

Trait Implementations

impl<const N: usize> Write for FmtBuffer<N>

fn write_str(&mut self, s: &str) -> Result

Writes a string slice into this writer, returning whether the write succeeded.

fn write_char(&mut self, c: char) -> Result<(), Error>

Writes a [char] into this writer, returning whether the write succeeded.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Glue for usage of the [write!] macro with implementors of this trait.