Struct stackfmt::WriteTo

pub struct WriteTo<'a> { /* fields omitted */ }

Impl of core::fmt::Write stream that writes formatted string into provided u8 buffer.

use core::fmt;

let mut buffer = [0u8; 16];
let mut w = stackfmt::WriteTo::new(&mut buffer);
match fmt::write(&mut w, format_args!("The answer is {}", 42)) {
   Ok(_) => w.as_str(),
   Err(_) => "",
};
assert_eq!(buffer, "The answer is 42".as_bytes());

Implementations

impl<'a> WriteTo<'a>

pub fn new(buffer: &'a mut [u8]) -> Self

Creates new stream.

pub fn written_bytes(&self) -> usize

How many bytes were written into the buffer

pub fn as_str(self) -> &'a str

Returns buffer view as &str

Trait Implementations

impl<'a> Write for WriteTo<'a>

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.