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|
// Protocol Buffers - Google's data interchange format
// Copyright 2024 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
use crate::__internal::{Private, SealedInternal};
use crate::{
AsView, IntoProxied, IntoView, ProtoBytes, ProtoStr, ProtoString, Proxied, Proxy, View,
ViewProxy,
};
use paste::paste;
use std::cmp::PartialEq;
use std::ops::Deref;
macro_rules! impl_cord_types {
($($t:ty, $vt:ty);*) => {
paste! { $(
#[derive(Debug)]
pub struct [< $t Cord>](Private);
#[derive(Debug)]
pub enum [< $t Cow>]<'a> {
Borrowed(View<'a, $t>),
Owned($t),
}
impl SealedInternal for [< $t Cord>] {}
impl<'msg> SealedInternal for [< $t Cow>]<'msg> {}
impl Proxied for [< $t Cord>] {
type View<'msg> = [< $t Cow>]<'msg>;
}
impl AsView for [< $t Cord>] {
type Proxied = Self;
fn as_view(&self) -> [< $t Cow>]<'_> {
unimplemented!("Proto Cord should never be constructed");
}
}
impl<'msg> Proxy<'msg> for [< $t Cow>]<'msg> {}
impl<'msg> ViewProxy<'msg> for [< $t Cow>]<'msg> {}
impl<'msg> AsView for [< $t Cow>]<'msg> {
type Proxied = [< $t Cord>];
fn as_view(&self) -> [< $t Cow>]<'_> {
match self {
[< $t Cow>]::Owned(owned) => [< $t Cow>]::Borrowed((*owned).as_view()),
[< $t Cow>]::Borrowed(borrowed) => [< $t Cow>]::Borrowed(borrowed),
}
}
}
impl<'msg> IntoView<'msg> for [< $t Cow>]<'msg> {
fn into_view<'shorter>(self) -> [< $t Cow>]<'shorter>
where
'msg: 'shorter, {
match self {
[< $t Cow>]::Owned(owned) => [< $t Cow>]::Owned(owned),
[< $t Cow>]::Borrowed(borrow) => [< $t Cow>]::Borrowed(borrow.into_view()),
}
}
}
impl IntoProxied<$t> for [< $t Cow>]<'_> {
fn into_proxied(self, _private: Private) -> $t {
match self {
[< $t Cow>]::Owned(owned) => owned,
[< $t Cow>]::Borrowed(borrowed) => borrowed.into_proxied(Private),
}
}
}
impl<'a> Deref for [< $t Cow>]<'a> {
type Target = $vt;
fn deref(&self) -> View<'_, $t> {
match self {
[< $t Cow>]::Borrowed(borrow) => borrow,
[< $t Cow>]::Owned(owned) => (*owned).as_view(),
}
}
}
impl AsRef<[u8]> for [< $t Cow>]<'_> {
fn as_ref(&self) -> &[u8] {
match self {
[< $t Cow>]::Borrowed(borrow) => borrow.as_ref(),
[< $t Cow>]::Owned(owned) => owned.as_ref(),
}
}
}
)*
}
}
}
impl_cord_types!(
ProtoString, ProtoStr;
ProtoBytes, [u8]
);
macro_rules! impl_eq {
($($t1:ty, $t2:ty);*) => {
paste! { $(
impl PartialEq<$t1> for $t2 {
fn eq(&self, rhs: &$t1) -> bool {
AsRef::<[u8]>::as_ref(self) == AsRef::<[u8]>::as_ref(rhs)
}
}
)*
}
}
}
impl_eq!(
ProtoStringCow<'_>, ProtoStringCow<'_>;
str, ProtoStringCow<'_>;
ProtoStringCow<'_>, str;
ProtoBytesCow<'_>, ProtoBytesCow<'_>;
[u8], ProtoBytesCow<'_>;
ProtoBytesCow<'_>, [u8]
);
|
