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#[cfg(feature = "kv_serde")]
mod imp {
use std::fmt;
use crate::key_values::value;
impl<'v> value::Value<'v> {
pub fn from_serde(v: &'v (impl serde::Serialize + fmt::Debug)) -> Self {
Self::from_any(v, |from, v| from.serde(v))
}
}
impl<'v> serde::Serialize for value::Value<'v> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
let mut visitor = SerdeBackend {
serializer: Some(serializer),
ok: None,
};
self.0.visit(&mut visitor).map_err(value::Error::into_serde)?;
Ok(visitor.ok.expect("missing return value"))
}
}
impl<'a> value::FromAny<'a> {
pub fn serde(self, v: (impl serde::Serialize + fmt::Debug)) -> Result<(), value::Error> {
self.0.serde(&v)
}
}
pub(in crate::key_values::value) trait Backend {
fn serde(&mut self, v: &dyn Value) -> Result<(), value::Error>;
}
pub(in crate::key_values::value) trait Value: erased_serde::Serialize + fmt::Debug {}
impl<T: ?Sized> Value for T where T: serde::Serialize + fmt::Debug {}
impl<'a> serde::Serialize for &'a dyn Value {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
erased_serde::serialize(*self, serializer)
}
}
struct SerdeBackend<S>
where
S: serde::Serializer,
{
serializer: Option<S>,
ok: Option<S::Ok>,
}
impl<S> SerdeBackend<S>
where
S: serde::Serializer,
{
fn serialize(&mut self, v: impl erased_serde::Serialize) -> Result<(), value::Error> {
self.ok = Some(erased_serde::serialize(&v, self.serializer.take().expect("missing serializer")).map_err(value::Error::from_serde)?);
Ok(())
}
}
impl<S> value::Backend for SerdeBackend<S>
where
S: serde::Serializer,
{
fn u64(&mut self, v: u64) -> Result<(), value::Error> {
self.serde(&v)
}
fn i64(&mut self, v: i64) -> Result<(), value::Error> {
self.serde(&v)
}
fn f64(&mut self, v: f64) -> Result<(), value::Error> {
self.serde(&v)
}
fn bool(&mut self, v: bool) -> Result<(), value::Error> {
self.serde(&v)
}
fn char(&mut self, v: char) -> Result<(), value::Error> {
self.serde(&v)
}
fn none(&mut self) -> Result<(), value::Error> {
self.serde(&Option::None::<()>)
}
fn str(&mut self, v: &str) -> Result<(), value::Error> {
self.serde(&v)
}
}
impl<S> Backend for SerdeBackend<S>
where
S: serde::Serializer,
{
fn serde(&mut self, v: &dyn Value) -> Result<(), value::Error> {
self.serialize(v)
}
}
impl<S> value::fmt::Backend for SerdeBackend<S>
where
S: serde::Serializer,
{
fn debug(&mut self, v: &dyn value::fmt::Value) -> Result<(), value::Error> {
self.serialize(format_args!("{:?}", v))
}
}
#[cfg(feature = "kv_sval")]
impl<S> value::sval::Backend for SerdeBackend<S>
where
S: serde::Serializer,
{
fn sval(&mut self, v: &dyn value::sval::Value) -> Result<(), value::Error> {
self.serialize(sval::serde::to_serialize(v))
}
}
}
#[cfg(not(feature = "kv_serde"))]
mod imp {
use crate::key_values::value;
pub(in crate::key_values::value) trait Backend {}
impl<V: ?Sized> Backend for V where V: value::Backend {}
}
pub(super) use self::imp::*;