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use serde::de::IntoDeserializer;
use super::Error;
pub(crate) struct KeyDeserializer {
span: Option<std::ops::Range<usize>>,
key: crate::InternalString,
}
impl KeyDeserializer {
pub(crate) fn new(key: crate::InternalString, span: Option<std::ops::Range<usize>>) -> Self {
KeyDeserializer { span, key }
}
}
impl<'de> serde::de::IntoDeserializer<'de, Error> for KeyDeserializer {
type Deserializer = Self;
fn into_deserializer(self) -> Self::Deserializer {
self
}
}
impl<'de> serde::de::Deserializer<'de> for KeyDeserializer {
type Error = Error;
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
self.key.into_deserializer().deserialize_any(visitor)
}
fn deserialize_enum<V>(
self,
name: &str,
variants: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
let _ = name;
let _ = variants;
visitor.visit_enum(self)
}
fn deserialize_struct<V>(
self,
name: &'static str,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
if serde_spanned::__unstable::is_spanned(name, fields) {
if let Some(span) = self.span.clone() {
return visitor.visit_map(super::SpannedDeserializer::new(self.key.as_str(), span));
}
}
self.deserialize_any(visitor)
}
serde::forward_to_deserialize_any! {
bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
bytes byte_buf map option unit newtype_struct
ignored_any unit_struct tuple_struct tuple identifier
}
}
impl<'de> serde::de::EnumAccess<'de> for KeyDeserializer {
type Error = super::Error;
type Variant = UnitOnly<Self::Error>;
fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>
where
T: serde::de::DeserializeSeed<'de>,
{
seed.deserialize(self).map(unit_only)
}
}
pub(crate) struct UnitOnly<E> {
marker: std::marker::PhantomData<E>,
}
fn unit_only<T, E>(t: T) -> (T, UnitOnly<E>) {
(
t,
UnitOnly {
marker: std::marker::PhantomData,
},
)
}
impl<'de, E> serde::de::VariantAccess<'de> for UnitOnly<E>
where
E: serde::de::Error,
{
type Error = E;
fn unit_variant(self) -> Result<(), Self::Error> {
Ok(())
}
fn newtype_variant_seed<T>(self, _seed: T) -> Result<T::Value, Self::Error>
where
T: serde::de::DeserializeSeed<'de>,
{
Err(serde::de::Error::invalid_type(
serde::de::Unexpected::UnitVariant,
&"newtype variant",
))
}
fn tuple_variant<V>(self, _len: usize, _visitor: V) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
Err(serde::de::Error::invalid_type(
serde::de::Unexpected::UnitVariant,
&"tuple variant",
))
}
fn struct_variant<V>(
self,
_fields: &'static [&'static str],
_visitor: V,
) -> Result<V::Value, Self::Error>
where
V: serde::de::Visitor<'de>,
{
Err(serde::de::Error::invalid_type(
serde::de::Unexpected::UnitVariant,
&"struct variant",
))
}
}
|
