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use super::{CandidType, Serializer, Type, TypeId};
use serde::de::{self, Deserialize, Deserializer, Visitor};
use std::fmt;
#[derive(PartialEq, Debug, Clone)]
pub struct Reserved;
#[derive(PartialEq, Debug)]
pub enum Empty {}
impl CandidType for Reserved {
fn id() -> TypeId {
TypeId::of::<Reserved>()
}
fn _ty() -> Type {
Type::Reserved
}
fn idl_serialize<S>(&self, serializer: S) -> Result<(), S::Error>
where
S: Serializer,
{
serializer.serialize_null(())
}
}
impl CandidType for Empty {
fn id() -> TypeId {
TypeId::of::<Empty>()
}
fn _ty() -> Type {
Type::Empty
}
fn idl_serialize<S>(&self, serializer: S) -> Result<(), S::Error>
where
S: Serializer,
{
serializer.serialize_empty()
}
}
impl<'de> Deserialize<'de> for Reserved {
fn deserialize<D>(deserializer: D) -> Result<Reserved, D::Error>
where
D: Deserializer<'de>,
{
deserializer
.deserialize_ignored_any(de::IgnoredAny)
.map(|_| Reserved)
}
}
impl<'de> Deserialize<'de> for Empty {
fn deserialize<D>(deserializer: D) -> Result<Empty, D::Error>
where
D: serde::Deserializer<'de>,
{
struct EmptyVisitor;
impl<'de> Visitor<'de> for EmptyVisitor {
type Value = Empty;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("Cannot decode empty value")
}
}
deserializer.deserialize_any(EmptyVisitor)
}
}