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Allow encode BufMut arg to be unsized #1080

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Allow encode BufMut arg to be unsized #1080

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3a91c4a
Allow encode BufMut arg to be unsized
dspyz-matician Jun 3, 2024
d70be65
rustfmt
dspyz-matician Jun 3, 2024
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4 changes: 2 additions & 2 deletions prost-derive/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -175,7 +175,7 @@ fn try_message(input: TokenStream) -> Result<TokenStream, Error> {
let expanded = quote! {
impl #impl_generics ::prost::Message for #ident #ty_generics #where_clause {
#[allow(unused_variables)]
fn encode_raw(&self, buf: &mut impl ::prost::bytes::BufMut) {
fn encode_raw(&self, buf: &mut (impl ::prost::bytes::BufMut + ?Sized)) {
#(#encode)*
}

Expand Down Expand Up @@ -462,7 +462,7 @@ fn try_oneof(input: TokenStream) -> Result<TokenStream, Error> {
let expanded = quote! {
impl #impl_generics #ident #ty_generics #where_clause {
/// Encodes the message to a buffer.
pub fn encode(&self, buf: &mut impl ::prost::bytes::BufMut) {
pub fn encode(&self, buf: &mut (impl ::prost::bytes::BufMut + ?Sized)) {
match *self {
#(#encode,)*
}
Expand Down
40 changes: 20 additions & 20 deletions prost/src/encoding.rs
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Expand Up @@ -22,7 +22,7 @@ use crate::Message;
/// Encodes an integer value into LEB128 variable length format, and writes it to the buffer.
/// The buffer must have enough remaining space (maximum 10 bytes).
#[inline]
pub fn encode_varint(mut value: u64, buf: &mut impl BufMut) {
pub fn encode_varint(mut value: u64, buf: &mut (impl BufMut + ?Sized)) {
// Varints are never more than 10 bytes
for _ in 0..10 {
if value < 0x80 {
Expand Down Expand Up @@ -292,7 +292,7 @@ impl TryFrom<u64> for WireType {
/// Encodes a Protobuf field key, which consists of a wire type designator and
/// the field tag.
#[inline]
pub fn encode_key(tag: u32, wire_type: WireType, buf: &mut impl BufMut) {
pub fn encode_key(tag: u32, wire_type: WireType, buf: &mut (impl BufMut + ?Sized)) {
debug_assert!((MIN_TAG..=MAX_TAG).contains(&tag));
let key = (tag << 3) | wire_type as u32;
encode_varint(u64::from(key), buf);
Expand Down Expand Up @@ -403,7 +403,7 @@ pub fn skip_field(
/// Helper macro which emits an `encode_repeated` function for the type.
macro_rules! encode_repeated {
($ty:ty) => {
pub fn encode_repeated(tag: u32, values: &[$ty], buf: &mut impl BufMut) {
pub fn encode_repeated(tag: u32, values: &[$ty], buf: &mut (impl BufMut + ?Sized)) {
for value in values {
encode(tag, value, buf);
}
Expand Down Expand Up @@ -462,7 +462,7 @@ macro_rules! varint {
pub mod $proto_ty {
use crate::encoding::*;

pub fn encode(tag: u32, $to_uint64_value: &$ty, buf: &mut impl BufMut) {
pub fn encode(tag: u32, $to_uint64_value: &$ty, buf: &mut (impl BufMut + ?Sized)) {
encode_key(tag, WireType::Varint, buf);
encode_varint($to_uint64, buf);
}
Expand All @@ -476,7 +476,7 @@ macro_rules! varint {

encode_repeated!($ty);

pub fn encode_packed(tag: u32, values: &[$ty], buf: &mut impl BufMut) {
pub fn encode_packed(tag: u32, values: &[$ty], buf: &mut (impl BufMut + ?Sized)) {
if values.is_empty() { return; }

encode_key(tag, WireType::LengthDelimited, buf);
Expand Down Expand Up @@ -585,7 +585,7 @@ macro_rules! fixed_width {
pub mod $proto_ty {
use crate::encoding::*;

pub fn encode(tag: u32, value: &$ty, buf: &mut impl BufMut) {
pub fn encode(tag: u32, value: &$ty, buf: &mut (impl BufMut + ?Sized)) {
encode_key(tag, $wire_type, buf);
buf.$put(*value);
}
Expand All @@ -606,7 +606,7 @@ macro_rules! fixed_width {

encode_repeated!($ty);

pub fn encode_packed(tag: u32, values: &[$ty], buf: &mut impl BufMut) {
pub fn encode_packed(tag: u32, values: &[$ty], buf: &mut (impl BufMut + ?Sized)) {
if values.is_empty() {
return;
}
Expand Down Expand Up @@ -758,7 +758,7 @@ macro_rules! length_delimited {
pub mod string {
use super::*;

pub fn encode(tag: u32, value: &String, buf: &mut impl BufMut) {
pub fn encode(tag: u32, value: &String, buf: &mut (impl BufMut + ?Sized)) {
encode_key(tag, WireType::LengthDelimited, buf);
encode_varint(value.len() as u64, buf);
buf.put_slice(value.as_bytes());
Expand Down Expand Up @@ -844,7 +844,7 @@ mod sealed {
fn replace_with(&mut self, buf: impl Buf);

/// Appends this buffer to the (contents of) other buffer.
fn append_to(&self, buf: &mut impl BufMut);
fn append_to(&self, buf: &mut (impl BufMut + ?Sized));

fn is_empty(&self) -> bool {
self.len() == 0
Expand All @@ -863,8 +863,8 @@ impl sealed::BytesAdapter for Bytes {
*self = buf.copy_to_bytes(buf.remaining());
}

fn append_to(&self, buf: &mut impl BufMut) {
buf.put(self.clone())
fn append_to(&self, buf: &mut (impl BufMut + ?Sized)) {
buf.put_slice(self)
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@dspyz-matician dspyz-matician Jun 3, 2024 •
edited
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Is this correct? Why is it the way it is currently?

}
}

Expand All @@ -881,15 +881,15 @@ impl sealed::BytesAdapter for Vec<u8> {
self.put(buf);
}

fn append_to(&self, buf: &mut impl BufMut) {
buf.put(self.as_slice())
fn append_to(&self, buf: &mut (impl BufMut + ?Sized)) {
buf.put_slice(self.as_slice())
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Here too

}
}

pub mod bytes {
use super::*;

pub fn encode(tag: u32, value: &impl BytesAdapter, buf: &mut impl BufMut) {
pub fn encode(tag: u32, value: &impl BytesAdapter, buf: &mut (impl BufMut + ?Sized)) {
encode_key(tag, WireType::LengthDelimited, buf);
encode_varint(value.len() as u64, buf);
value.append_to(buf);
Expand Down Expand Up @@ -986,7 +986,7 @@ pub mod bytes {
pub mod message {
use super::*;

pub fn encode<M>(tag: u32, msg: &M, buf: &mut impl BufMut)
pub fn encode<M>(tag: u32, msg: &M, buf: &mut (impl BufMut + ?Sized))
where
M: Message,
{
Expand Down Expand Up @@ -1018,7 +1018,7 @@ pub mod message {
)
}

pub fn encode_repeated<M>(tag: u32, messages: &[M], buf: &mut impl BufMut)
pub fn encode_repeated<M>(tag: u32, messages: &[M], buf: &mut (impl BufMut + ?Sized))
where
M: Message,
{
Expand Down Expand Up @@ -1069,7 +1069,7 @@ pub mod message {
pub mod group {
use super::*;

pub fn encode<M>(tag: u32, msg: &M, buf: &mut impl BufMut)
pub fn encode<M>(tag: u32, msg: &M, buf: &mut (impl BufMut + ?Sized))
where
M: Message,
{
Expand Down Expand Up @@ -1104,7 +1104,7 @@ pub mod group {
}
}

pub fn encode_repeated<M>(tag: u32, messages: &[M], buf: &mut impl BufMut)
pub fn encode_repeated<M>(tag: u32, messages: &[M], buf: &mut (impl BufMut + ?Sized))
where
M: Message,
{
Expand Down Expand Up @@ -1166,7 +1166,7 @@ macro_rules! map {
) where
K: Default + Eq + Hash + Ord,
V: Default + PartialEq,
B: BufMut,
B: BufMut + ?Sized,
KE: Fn(u32, &K, &mut B),
KL: Fn(u32, &K) -> usize,
VE: Fn(u32, &V, &mut B),
Expand Down Expand Up @@ -1234,7 +1234,7 @@ macro_rules! map {
) where
K: Default + Eq + Hash + Ord,
V: PartialEq,
B: BufMut,
B: BufMut + ?Sized,
KE: Fn(u32, &K, &mut B),
KL: Fn(u32, &K) -> usize,
VE: Fn(u32, &V, &mut B),
Expand Down
2 changes: 1 addition & 1 deletion prost/src/lib.rs
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Expand Up @@ -36,7 +36,7 @@ const RECURSION_LIMIT: u32 = 100;
///
/// An error will be returned if the buffer does not have sufficient capacity to encode the
/// delimiter.
pub fn encode_length_delimiter(length: usize, buf: &mut impl BufMut) -> Result<(), EncodeError> {
pub fn encode_length_delimiter(length: usize, buf: &mut (impl BufMut + ?Sized)) -> Result<(), EncodeError> {
let length = length as u64;
let required = encoded_len_varint(length);
let remaining = buf.remaining_mut();
Expand Down
8 changes: 4 additions & 4 deletions prost/src/message.rs
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Expand Up @@ -21,7 +21,7 @@ pub trait Message: Debug + Send + Sync {
///
/// Meant to be used only by `Message` implementations.
#[doc(hidden)]
fn encode_raw(&self, buf: &mut impl BufMut)
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized))
where
Self: Sized;

Expand All @@ -45,7 +45,7 @@ pub trait Message: Debug + Send + Sync {
/// Encodes the message to a buffer.
///
/// An error will be returned if the buffer does not have sufficient capacity.
fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>
fn encode(&self, buf: &mut (impl BufMut + ?Sized)) -> Result<(), EncodeError>
where
Self: Sized,
{
Expand Down Expand Up @@ -73,7 +73,7 @@ pub trait Message: Debug + Send + Sync {
/// Encodes the message with a length-delimiter to a buffer.
///
/// An error will be returned if the buffer does not have sufficient capacity.
fn encode_length_delimited(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>
fn encode_length_delimited(&self, buf: &mut (impl BufMut + ?Sized)) -> Result<(), EncodeError>
where
Self: Sized,
{
Expand Down Expand Up @@ -159,7 +159,7 @@ impl<M> Message for Box<M>
where
M: Message,
{
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
(**self).encode_raw(buf)
}
fn merge_field(
Expand Down
22 changes: 11 additions & 11 deletions prost/src/types.rs
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Expand Up @@ -22,7 +22,7 @@ use crate::{

/// `google.protobuf.BoolValue`
impl Message for bool {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self {
bool::encode(1, self, buf)
}
Expand Down Expand Up @@ -54,7 +54,7 @@ impl Message for bool {

/// `google.protobuf.UInt32Value`
impl Message for u32 {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self != 0 {
uint32::encode(1, self, buf)
}
Expand Down Expand Up @@ -86,7 +86,7 @@ impl Message for u32 {

/// `google.protobuf.UInt64Value`
impl Message for u64 {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self != 0 {
uint64::encode(1, self, buf)
}
Expand Down Expand Up @@ -118,7 +118,7 @@ impl Message for u64 {

/// `google.protobuf.Int32Value`
impl Message for i32 {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self != 0 {
int32::encode(1, self, buf)
}
Expand Down Expand Up @@ -150,7 +150,7 @@ impl Message for i32 {

/// `google.protobuf.Int64Value`
impl Message for i64 {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self != 0 {
int64::encode(1, self, buf)
}
Expand Down Expand Up @@ -182,7 +182,7 @@ impl Message for i64 {

/// `google.protobuf.FloatValue`
impl Message for f32 {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self != 0.0 {
float::encode(1, self, buf)
}
Expand Down Expand Up @@ -214,7 +214,7 @@ impl Message for f32 {

/// `google.protobuf.DoubleValue`
impl Message for f64 {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if *self != 0.0 {
double::encode(1, self, buf)
}
Expand Down Expand Up @@ -246,7 +246,7 @@ impl Message for f64 {

/// `google.protobuf.StringValue`
impl Message for String {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if !self.is_empty() {
string::encode(1, self, buf)
}
Expand Down Expand Up @@ -278,7 +278,7 @@ impl Message for String {

/// `google.protobuf.BytesValue`
impl Message for Vec<u8> {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if !self.is_empty() {
bytes::encode(1, self, buf)
}
Expand Down Expand Up @@ -310,7 +310,7 @@ impl Message for Vec<u8> {

/// `google.protobuf.BytesValue`
impl Message for Bytes {
fn encode_raw(&self, buf: &mut impl BufMut) {
fn encode_raw(&self, buf: &mut (impl BufMut + ?Sized)) {
if !self.is_empty() {
bytes::encode(1, self, buf)
}
Expand Down Expand Up @@ -342,7 +342,7 @@ impl Message for Bytes {

/// `google.protobuf.Empty`
impl Message for () {
fn encode_raw(&self, _buf: &mut impl BufMut) {}
fn encode_raw(&self, _buf: &mut (impl BufMut + ?Sized)) {}
fn merge_field(
&mut self,
tag: u32,
Expand Down
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