Struct Writer 

pub struct Writer { /* private fields */ }

Implementations

impl Writer

pub fn new() -> Self

pub fn with_capacity(cap: usize) -> Self

pub fn finish(self) -> Vec<u8>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn raw(&mut self, b: &[u8])

Append raw bytes (no length prefix).

pub fn varint(&mut self, v: u64)

Write an unsigned varint.

pub fn varint_i32(&mut self, v: i32)

Proto3 int32: plain varint, with negative values sign-extended to a 10-byte uint64.

pub fn varint_i64(&mut self, v: i64)

Proto3 int64: plain varint, two’s-complement uint64 form.

pub fn zigzag32(&mut self, v: i32)

Zigzag-encoded signed varint (proto3 sint32).

pub fn zigzag64(&mut self, v: i64)

Zigzag-encoded signed varint (proto3 sint64).

pub fn fixed32(&mut self, v: u32)

Little-endian fixed 32-bit unsigned integer.

pub fn fixed64(&mut self, v: u64)

Little-endian fixed 64-bit unsigned integer.

pub fn float(&mut self, v: f32)

IEEE 754 32-bit float, little-endian.

pub fn double(&mut self, v: f64)

IEEE 754 64-bit double, little-endian.

pub fn string(&mut self, v: &str)

UTF-8 length-prefixed string.

pub fn bytes(&mut self, v: &[u8])

Length-prefixed byte sequence.

pub fn tag(&mut self, field_number: u32, wire_type: WireType)

Tag = (field_number << 3) | wire_type, encoded as a varint.

Panics on out-of-range field numbers — that’s a programmer error, not a wire-format failure.

Trait Implementations

impl Debug for Writer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Writer

fn default() -> Writer

Returns the “default value” for a type.