pub(super) mod opt;
use crate::err::Error;
use crate::value::serde::ser;
use ser::Serializer as _;
use serde::ser::Error as _;
use serde::ser::Impossible;
use serde::ser::Serialize;
use std::time::Duration;
pub(super) struct Serializer;
impl ser::Serializer for Serializer {
type Ok = Duration;
type Error = Error;
type SerializeSeq = Impossible<Duration, Error>;
type SerializeTuple = Impossible<Duration, Error>;
type SerializeTupleStruct = Impossible<Duration, Error>;
type SerializeTupleVariant = Impossible<Duration, Error>;
type SerializeMap = Impossible<Duration, Error>;
type SerializeStruct = SerializeDuration;
type SerializeStructVariant = Impossible<Duration, Error>;
const EXPECTED: &'static str = "a struct `Duration`";
#[inline]
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Error> {
Ok(SerializeDuration::default())
}
#[inline]
fn serialize_newtype_struct<T>(
self,
_name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
value.serialize(self.wrap())
}
}
#[derive(Default)]
pub(super) struct SerializeDuration {
secs: Option<u64>,
nanos: Option<u32>,
}
impl serde::ser::SerializeStruct for SerializeDuration {
type Ok = Duration;
type Error = Error;
fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
where
T: ?Sized + Serialize,
{
match key {
"secs" => {
self.secs = Some(value.serialize(ser::primitive::u64::Serializer.wrap())?);
}
"nanos" => {
self.nanos = Some(value.serialize(ser::primitive::u32::Serializer.wrap())?);
}
key => {
return Err(Error::custom(format!("unexpected field `Duration::{key}`")));
}
}
Ok(())
}
fn end(self) -> Result<Self::Ok, Error> {
match (self.secs, self.nanos) {
(Some(secs), Some(nanos)) => Ok(Duration::new(secs, nanos)),
_ => Err(Error::custom("`Duration` missing required field(s)")),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use serde::Serialize;
#[test]
fn default() {
let duration = Duration::default();
let serialized = duration.serialize(Serializer.wrap()).unwrap();
assert_eq!(duration, serialized);
}
}