Struct SizeWriter 

pub struct SizeWriter {
    pub bytes_written: usize,
}

A writer that counts how many bytes were written. This is useful for e.g. pre-allocating buffers before writing to them.

Fields

bytes_written: usize

the amount of bytes that were written so far

Trait Implementations

impl Default for SizeWriter

fn default() -> SizeWriter

Returns the “default value” for a type.

impl Writer for SizeWriter

fn write(&mut self, bytes: &[u8]) -> Result<(), EncodeError>

Write bytes to the underlying writer. Exactly bytes.len() bytes must be written, or else an error should be returned.

fn write_u8(&mut self, _: u8) -> Result<(), EncodeError>

Write a single byte to the underlying writer.

fn write_u16(&mut self, _: u16) -> Result<(), EncodeError>

Write a u16 to the underlying writer.

fn write_u32(&mut self, _: u32) -> Result<(), EncodeError>

Write a u32 to the underlying writer.

fn write_u64(&mut self, _: u64) -> Result<(), EncodeError>

Write a u64 to the underlying writer.

fn write_u128(&mut self, _: u128) -> Result<(), EncodeError>

Write a u128 to the underlying writer.