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use crate::Bytes;
use serde::Deserializer;
#[cfg(any(feature = "std", feature = "alloc"))]
use crate::ByteBuf;
#[cfg(feature = "alloc")]
use alloc::borrow::Cow;
#[cfg(all(feature = "std", not(feature = "alloc")))]
use std::borrow::Cow;
#[cfg(feature = "alloc")]
use alloc::boxed::Box;
#[cfg(feature = "alloc")]
use alloc::vec::Vec;
/// Types that can be deserialized via `#[serde(with = "serde_bytes")]`.
pub trait Deserialize<'de>: Sized {
#[allow(missing_docs)]
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>;
}
impl<'de: 'a, 'a> Deserialize<'de> for &'a [u8] {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
// Via the serde::Deserialize impl for &[u8].
serde::Deserialize::deserialize(deserializer)
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'de> Deserialize<'de> for Vec<u8> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
Deserialize::deserialize(deserializer).map(ByteBuf::into_vec)
}
}
impl<'de: 'a, 'a> Deserialize<'de> for &'a Bytes {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
Deserialize::deserialize(deserializer).map(Bytes::new)
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'de> Deserialize<'de> for ByteBuf {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
// Via the serde::Deserialize impl for ByteBuf.
serde::Deserialize::deserialize(deserializer)
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, [u8]> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
Deserialize::deserialize(deserializer).map(Cow::Borrowed)
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, Bytes> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
Deserialize::deserialize(deserializer).map(Cow::Borrowed)
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'de> Deserialize<'de> for Box<[u8]> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
Deserialize::deserialize(deserializer).map(Vec::into_boxed_slice)
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'de> Deserialize<'de> for Box<Bytes> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let bytes: Box<[u8]> = Deserialize::deserialize(deserializer)?;
Ok(bytes.into())
}
}
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