Struct FieldWriter 

pub struct FieldWriter { /* private fields */ }

Writes one storage part’s fields in order. pack runs the same fields twice: once to count their bytes, then into a buffer of exactly that size, so no secret is left behind in a grown allocation.

Implementations

impl FieldWriter

pub fn u8(&mut self, value: u8) -> Result<(), Error>

A u8: a tag or a small number.

pub fn u16(&mut self, value: u16) -> Result<(), Error>

A u16, big-endian.

pub fn text(&mut self, value: &str) -> Result<(), Error>

A text: its UTF-8 length as a u32, then its bytes.

pub fn option<T>( &mut self, value: Option<T>, put: impl FnOnce(&mut Self, T) -> Result<(), Error>, ) -> Result<(), Error>

An Option<T>: 0, or 1 and the value’s fields.