Struct serde_yaml::Mapping
source · pub struct Mapping { /* private fields */ }
Expand description
A YAML mapping in which the keys and values are both serde_yaml::Value
.
Implementations§
source§impl Mapping
impl Mapping
sourcepub fn new() -> Self
pub fn new() -> Self
Creates an empty YAML map.
Examples found in repository?
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fn visit_unit<E>(self) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
Ok(Mapping::new())
}
#[inline]
fn visit_map<A>(self, mut data: A) -> Result<Self::Value, A::Error>
where
A: serde::de::MapAccess<'de>,
{
let mut mapping = Mapping::new();
while let Some(key) = data.next_key()? {
match mapping.entry(key) {
Entry::Occupied(entry) => {
return Err(serde::de::Error::custom(DuplicateKeyError { entry }));
}
Entry::Vacant(entry) => {
let value = data.next_value()?;
entry.insert(value);
}
}
}
Ok(mapping)
}
More examples
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fn serialize_map(self, len: Option<usize>) -> Result<SerializeMap> {
if len == Some(1) {
Ok(SerializeMap::CheckForTag)
} else {
Ok(SerializeMap::Untagged {
mapping: Mapping::new(),
next_key: None,
})
}
}
fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<SerializeStruct> {
Ok(SerializeStruct {
mapping: Mapping::new(),
})
}
fn serialize_struct_variant(
self,
_enum: &'static str,
_idx: u32,
variant: &'static str,
_len: usize,
) -> Result<SerializeStructVariant> {
Ok(SerializeStructVariant {
tag: variant,
mapping: Mapping::new(),
})
}
}
pub struct SerializeArray {
sequence: Sequence,
}
impl ser::SerializeSeq for SerializeArray {
type Ok = Value;
type Error = Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.sequence.push(to_value(elem)?);
Ok(())
}
fn end(self) -> Result<Value> {
Ok(Value::Sequence(self.sequence))
}
}
impl ser::SerializeTuple for SerializeArray {
type Ok = Value;
type Error = Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
ser::SerializeSeq::serialize_element(self, elem)
}
fn end(self) -> Result<Value> {
ser::SerializeSeq::end(self)
}
}
impl ser::SerializeTupleStruct for SerializeArray {
type Ok = Value;
type Error = Error;
fn serialize_field<V>(&mut self, value: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
ser::SerializeSeq::serialize_element(self, value)
}
fn end(self) -> Result<Value> {
ser::SerializeSeq::end(self)
}
}
pub struct SerializeTupleVariant {
tag: &'static str,
sequence: Sequence,
}
impl ser::SerializeTupleVariant for SerializeTupleVariant {
type Ok = Value;
type Error = Error;
fn serialize_field<V>(&mut self, v: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.sequence.push(to_value(v)?);
Ok(())
}
fn end(self) -> Result<Value> {
Ok(Value::Tagged(Box::new(TaggedValue {
tag: Tag::new(self.tag),
value: Value::Sequence(self.sequence),
})))
}
}
pub enum SerializeMap {
CheckForTag,
Tagged(TaggedValue),
Untagged {
mapping: Mapping,
next_key: Option<Value>,
},
}
impl ser::SerializeMap for SerializeMap {
type Ok = Value;
type Error = Error;
fn serialize_key<T>(&mut self, key: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
let key = Some(to_value(key)?);
match self {
SerializeMap::CheckForTag => {
*self = SerializeMap::Untagged {
mapping: Mapping::new(),
next_key: key,
};
}
SerializeMap::Tagged(tagged) => {
let mut mapping = Mapping::new();
mapping.insert(
Value::String(tagged.tag.to_string()),
mem::take(&mut tagged.value),
);
*self = SerializeMap::Untagged {
mapping,
next_key: key,
};
}
SerializeMap::Untagged { next_key, .. } => *next_key = key,
}
Ok(())
}
fn serialize_value<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
let (mapping, key) = match self {
SerializeMap::CheckForTag | SerializeMap::Tagged(_) => unreachable!(),
SerializeMap::Untagged { mapping, next_key } => (mapping, next_key),
};
match key.take() {
Some(key) => mapping.insert(key, to_value(value)?),
None => panic!("serialize_value called before serialize_key"),
};
Ok(())
}
fn serialize_entry<K, V>(&mut self, key: &K, value: &V) -> Result<()>
where
K: ?Sized + ser::Serialize,
V: ?Sized + ser::Serialize,
{
struct CheckForTag;
struct NotTag<T> {
delegate: T,
}
impl ser::Serializer for CheckForTag {
type Ok = MaybeTag<Value>;
type Error = Error;
type SerializeSeq = NotTag<SerializeArray>;
type SerializeTuple = NotTag<SerializeArray>;
type SerializeTupleStruct = NotTag<SerializeArray>;
type SerializeTupleVariant = NotTag<SerializeTupleVariant>;
type SerializeMap = NotTag<SerializeMap>;
type SerializeStruct = NotTag<SerializeStruct>;
type SerializeStructVariant = NotTag<SerializeStructVariant>;
fn serialize_bool(self, v: bool) -> Result<Self::Ok> {
Serializer.serialize_bool(v).map(MaybeTag::NotTag)
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok> {
Serializer.serialize_i8(v).map(MaybeTag::NotTag)
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok> {
Serializer.serialize_i16(v).map(MaybeTag::NotTag)
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok> {
Serializer.serialize_i32(v).map(MaybeTag::NotTag)
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok> {
Serializer.serialize_i64(v).map(MaybeTag::NotTag)
}
fn serialize_i128(self, v: i128) -> Result<Self::Ok> {
Serializer.serialize_i128(v).map(MaybeTag::NotTag)
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok> {
Serializer.serialize_u8(v).map(MaybeTag::NotTag)
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok> {
Serializer.serialize_u16(v).map(MaybeTag::NotTag)
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok> {
Serializer.serialize_u32(v).map(MaybeTag::NotTag)
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok> {
Serializer.serialize_u64(v).map(MaybeTag::NotTag)
}
fn serialize_u128(self, v: u128) -> Result<Self::Ok> {
Serializer.serialize_u128(v).map(MaybeTag::NotTag)
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok> {
Serializer.serialize_f32(v).map(MaybeTag::NotTag)
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok> {
Serializer.serialize_f64(v).map(MaybeTag::NotTag)
}
fn serialize_char(self, value: char) -> Result<Self::Ok> {
Serializer.serialize_char(value).map(MaybeTag::NotTag)
}
fn serialize_str(self, value: &str) -> Result<Self::Ok> {
Serializer.serialize_str(value).map(MaybeTag::NotTag)
}
fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok> {
Serializer.serialize_bytes(value).map(MaybeTag::NotTag)
}
fn serialize_unit(self) -> Result<Self::Ok> {
Serializer.serialize_unit().map(MaybeTag::NotTag)
}
fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok> {
Serializer.serialize_unit_struct(name).map(MaybeTag::NotTag)
}
fn serialize_unit_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok> {
Serializer
.serialize_unit_variant(name, variant_index, variant)
.map(MaybeTag::NotTag)
}
fn serialize_newtype_struct<T>(self, name: &'static str, value: &T) -> Result<Self::Ok>
where
T: ?Sized + ser::Serialize,
{
Serializer
.serialize_newtype_struct(name, value)
.map(MaybeTag::NotTag)
}
fn serialize_newtype_variant<T>(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok>
where
T: ?Sized + ser::Serialize,
{
Serializer
.serialize_newtype_variant(name, variant_index, variant, value)
.map(MaybeTag::NotTag)
}
fn serialize_none(self) -> Result<Self::Ok> {
Serializer.serialize_none().map(MaybeTag::NotTag)
}
fn serialize_some<V>(self, value: &V) -> Result<Self::Ok>
where
V: ?Sized + ser::Serialize,
{
Serializer.serialize_some(value).map(MaybeTag::NotTag)
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
Ok(NotTag {
delegate: Serializer.serialize_seq(len)?,
})
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
Ok(NotTag {
delegate: Serializer.serialize_tuple(len)?,
})
}
fn serialize_tuple_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct> {
Ok(NotTag {
delegate: Serializer.serialize_tuple_struct(name, len)?,
})
}
fn serialize_tuple_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant> {
Ok(NotTag {
delegate: Serializer.serialize_tuple_variant(
name,
variant_index,
variant,
len,
)?,
})
}
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap> {
Ok(NotTag {
delegate: Serializer.serialize_map(len)?,
})
}
fn serialize_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct> {
Ok(NotTag {
delegate: Serializer.serialize_struct(name, len)?,
})
}
fn serialize_struct_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeStructVariant> {
Ok(NotTag {
delegate: Serializer.serialize_struct_variant(
name,
variant_index,
variant,
len,
)?,
})
}
fn collect_str<T>(self, value: &T) -> Result<Self::Ok>
where
T: ?Sized + Display,
{
Ok(match tagged::check_for_tag(value) {
MaybeTag::Tag(tag) => MaybeTag::Tag(tag),
MaybeTag::NotTag(string) => MaybeTag::NotTag(Value::String(string)),
})
}
}
impl ser::SerializeSeq for NotTag<SerializeArray> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_element(elem)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeTuple for NotTag<SerializeArray> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_element(elem)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeTupleStruct for NotTag<SerializeArray> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, value: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(value)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeTupleVariant for NotTag<SerializeTupleVariant> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, v: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(v)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeMap for NotTag<SerializeMap> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_key<T>(&mut self, key: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_key(key)
}
fn serialize_value<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_value(value)
}
fn serialize_entry<K, V>(&mut self, key: &K, value: &V) -> Result<()>
where
K: ?Sized + ser::Serialize,
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_entry(key, value)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeStruct for NotTag<SerializeStruct> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, key: &'static str, value: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(key, value)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeStructVariant for NotTag<SerializeStructVariant> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, field: &'static str, v: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(field, v)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
match self {
SerializeMap::CheckForTag => {
let key = key.serialize(CheckForTag)?;
let mut mapping = Mapping::new();
*self = match key {
MaybeTag::Tag(string) => SerializeMap::Tagged(TaggedValue {
tag: Tag::new(string),
value: to_value(value)?,
}),
MaybeTag::NotTag(key) => {
mapping.insert(key, to_value(value)?);
SerializeMap::Untagged {
mapping,
next_key: None,
}
}
};
}
SerializeMap::Tagged(tagged) => {
let mut mapping = Mapping::new();
mapping.insert(
Value::String(tagged.tag.to_string()),
mem::take(&mut tagged.value),
);
mapping.insert(to_value(key)?, to_value(value)?);
*self = SerializeMap::Untagged {
mapping,
next_key: None,
};
}
SerializeMap::Untagged { mapping, .. } => {
mapping.insert(to_value(key)?, to_value(value)?);
}
}
Ok(())
}
fn end(self) -> Result<Value> {
Ok(match self {
SerializeMap::CheckForTag => Value::Mapping(Mapping::new()),
SerializeMap::Tagged(tagged) => Value::Tagged(Box::new(tagged)),
SerializeMap::Untagged { mapping, .. } => Value::Mapping(mapping),
})
}
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fn index_or_insert_mapping<'v, I>(index: &I, mut v: &'v mut Value) -> &'v mut Value
where
I: ?Sized + mapping::Index + ToOwned + Debug,
Value: From<I::Owned>,
{
if let Value::Null = *v {
*v = Value::Mapping(Mapping::new());
return match v {
Value::Mapping(map) => match map.entry(index.to_owned().into()) {
Entry::Vacant(entry) => entry.insert(Value::Null),
Entry::Occupied(_) => unreachable!(),
},
_ => unreachable!(),
};
}
loop {
match v {
Value::Mapping(map) => {
return map.entry(index.to_owned().into()).or_insert(Value::Null);
}
Value::Tagged(tagged) => v = &mut tagged.value,
_ => panic!("cannot access key {:?} in YAML {}", index, Type(v)),
}
}
}
sourcepub fn with_capacity(capacity: usize) -> Self
pub fn with_capacity(capacity: usize) -> Self
Creates an empty YAML map with the given initial capacity.
Examples found in repository?
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fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_key(variant)?;
let mapping = Mapping::with_capacity(len);
Ok(SerializeStructVariantAsSingletonMap { map, mapping })
}
fn collect_str<T>(self, value: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Display,
{
self.delegate.collect_str(value)
}
}
struct SerializeTupleVariantAsSingletonMap<M> {
map: M,
sequence: Sequence,
}
impl<M> SerializeTupleVariant for SerializeTupleVariantAsSingletonMap<M>
where
M: SerializeMap,
{
type Ok = M::Ok;
type Error = M::Error;
fn serialize_field<T>(&mut self, field: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = field
.serialize(crate::value::Serializer)
.map_err(ser::Error::custom)?;
self.sequence.push(value);
Ok(())
}
fn end(mut self) -> Result<Self::Ok, Self::Error> {
self.map.serialize_value(&self.sequence)?;
self.map.end()
}
}
struct SerializeStructVariantAsSingletonMap<M> {
map: M,
mapping: Mapping,
}
impl<M> SerializeStructVariant for SerializeStructVariantAsSingletonMap<M>
where
M: SerializeMap,
{
type Ok = M::Ok;
type Error = M::Error;
fn serialize_field<T>(&mut self, name: &'static str, field: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = field
.serialize(crate::value::Serializer)
.map_err(ser::Error::custom)?;
self.mapping.insert(Value::String(name.to_owned()), value);
Ok(())
}
fn end(mut self) -> Result<Self::Ok, Self::Error> {
self.map.serialize_value(&self.mapping)?;
self.map.end()
}
}
impl<'de, D> Deserializer<'de> for SingletonMap<D>
where
D: Deserializer<'de>,
{
type Error = D::Error;
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_any(visitor)
}
fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_bool(visitor)
}
fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i8(visitor)
}
fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i16(visitor)
}
fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i32(visitor)
}
fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i64(visitor)
}
fn deserialize_i128<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i128(visitor)
}
fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u8(visitor)
}
fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u16(visitor)
}
fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u32(visitor)
}
fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u64(visitor)
}
fn deserialize_u128<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u128(visitor)
}
fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_f32(visitor)
}
fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_f64(visitor)
}
fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_char(visitor)
}
fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_str(visitor)
}
fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_string(visitor)
}
fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_bytes(visitor)
}
fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_byte_buf(visitor)
}
fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_option(SingletonMapAsEnum {
name: "",
delegate: visitor,
})
}
fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_unit(visitor)
}
fn deserialize_unit_struct<V>(
self,
name: &'static str,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_unit_struct(name, visitor)
}
fn deserialize_newtype_struct<V>(
self,
name: &'static str,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_newtype_struct(name, visitor)
}
fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_seq(visitor)
}
fn deserialize_tuple<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_tuple(len, visitor)
}
fn deserialize_tuple_struct<V>(
self,
name: &'static str,
len: usize,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_tuple_struct(name, len, visitor)
}
fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_map(visitor)
}
fn deserialize_struct<V>(
self,
name: &'static str,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_struct(name, fields, visitor)
}
fn deserialize_enum<V>(
self,
name: &'static str,
_variants: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_any(SingletonMapAsEnum {
name,
delegate: visitor,
})
}
fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_identifier(visitor)
}
fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_ignored_any(visitor)
}
}
struct SingletonMapAsEnum<D> {
name: &'static str,
delegate: D,
}
impl<'de, V> Visitor<'de> for SingletonMapAsEnum<V>
where
V: Visitor<'de>,
{
type Value = V::Value;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
self.delegate.expecting(formatter)
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate.visit_enum(de::value::StrDeserializer::new(v))
}
fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate
.visit_enum(de::value::BorrowedStrDeserializer::new(v))
}
fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate
.visit_enum(de::value::StringDeserializer::new(v))
}
fn visit_none<E>(self) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate.visit_none()
}
fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: Deserializer<'de>,
{
self.delegate.visit_some(SingletonMap {
delegate: deserializer,
})
}
fn visit_unit<E>(self) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate.visit_unit()
}
fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
where
A: MapAccess<'de>,
{
self.delegate.visit_enum(SingletonMapAsEnum {
name: self.name,
delegate: map,
})
}
}
impl<'de, D> EnumAccess<'de> for SingletonMapAsEnum<D>
where
D: MapAccess<'de>,
{
type Error = D::Error;
type Variant = Self;
fn variant_seed<V>(mut self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
where
V: DeserializeSeed<'de>,
{
match self.delegate.next_key_seed(seed)? {
Some(value) => Ok((value, self)),
None => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
}
impl<'de, D> VariantAccess<'de> for SingletonMapAsEnum<D>
where
D: MapAccess<'de>,
{
type Error = D::Error;
fn unit_variant(self) -> Result<(), Self::Error> {
Err(de::Error::invalid_type(Unexpected::Map, &"unit variant"))
}
fn newtype_variant_seed<T>(mut self, seed: T) -> Result<T::Value, Self::Error>
where
T: DeserializeSeed<'de>,
{
let value = self.delegate.next_value_seed(seed)?;
match self.delegate.next_key()? {
None => Ok(value),
Some(IgnoredAny) => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
fn tuple_variant<V>(mut self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
let value = self
.delegate
.next_value_seed(TupleVariantSeed { len, visitor })?;
match self.delegate.next_key()? {
None => Ok(value),
Some(IgnoredAny) => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
fn struct_variant<V>(
mut self,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
let value = self.delegate.next_value_seed(StructVariantSeed {
name: self.name,
fields,
visitor,
})?;
match self.delegate.next_key()? {
None => Ok(value),
Some(IgnoredAny) => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
}
struct TupleVariantSeed<V> {
len: usize,
visitor: V,
}
impl<'de, V> DeserializeSeed<'de> for TupleVariantSeed<V>
where
V: Visitor<'de>,
{
type Value = V::Value;
fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_tuple(self.len, self.visitor)
}
}
struct StructVariantSeed<V> {
name: &'static str,
fields: &'static [&'static str],
visitor: V,
}
impl<'de, V> DeserializeSeed<'de> for StructVariantSeed<V>
where
V: Visitor<'de>,
{
type Value = V::Value;
fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_struct(self.name, self.fields, self.visitor)
}
}
}
/// Apply [`singleton_map`] to *all* enums contained within the data structure.
///
/// # Example
///
/// ```
/// # use serde_derive::{Deserialize, Serialize};
/// use serde::{Deserialize, Serialize};
///
/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// enum Enum {
/// Int(i32),
/// }
///
/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// struct Inner {
/// a: Enum,
/// bs: Vec<Enum>,
/// }
///
/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// struct Outer {
/// tagged_style: Inner,
///
/// #[serde(with = "serde_yaml::with::singleton_map_recursive")]
/// singleton_map_style: Inner,
/// }
///
/// fn main() {
/// let object = Outer {
/// tagged_style: Inner {
/// a: Enum::Int(0),
/// bs: vec![Enum::Int(1)],
/// },
/// singleton_map_style: Inner {
/// a: Enum::Int(2),
/// bs: vec![Enum::Int(3)],
/// },
/// };
///
/// let yaml = serde_yaml::to_string(&object).unwrap();
/// print!("{}", yaml);
///
/// let deserialized: Outer = serde_yaml::from_str(&yaml).unwrap();
/// assert_eq!(object, deserialized);
/// }
/// ```
///
/// The serialized output is:
///
/// ```yaml
/// tagged_style:
/// a: !Int 0
/// bs:
/// - !Int 1
/// singleton_map_style:
/// a:
/// Int: 2
/// bs:
/// - Int: 3
/// ```
///
/// This module can also be used for the top-level serializer or deserializer
/// call, without `serde(with = …)`, as follows.
///
/// ```
/// # use serde_derive::{Deserialize, Serialize};
/// # use serde::{Deserialize, Serialize};
/// #
/// # #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// # enum Enum {
/// # Int(i32),
/// # }
/// #
/// # #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// # struct Inner {
/// # a: Enum,
/// # bs: Vec<Enum>,
/// # }
/// #
/// use std::io::{self, Write};
///
/// fn main() {
/// let object = Inner {
/// a: Enum::Int(0),
/// bs: vec![Enum::Int(1)],
/// };
///
/// let mut buf = Vec::new();
/// let mut serializer = serde_yaml::Serializer::new(&mut buf);
/// serde_yaml::with::singleton_map_recursive::serialize(&object, &mut serializer).unwrap();
/// io::stdout().write_all(&buf).unwrap();
///
/// let deserializer = serde_yaml::Deserializer::from_slice(&buf);
/// let deserialized: Inner = serde_yaml::with::singleton_map_recursive::deserialize(deserializer).unwrap();
/// assert_eq!(object, deserialized);
/// }
/// ```
pub mod singleton_map_recursive {
use crate::value::{Mapping, Sequence, Value};
use serde::de::{
self, Deserialize, DeserializeSeed, Deserializer, EnumAccess, IgnoredAny, MapAccess,
SeqAccess, Unexpected, VariantAccess, Visitor,
};
use serde::ser::{
self, Serialize, SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant,
SerializeTuple, SerializeTupleStruct, SerializeTupleVariant, Serializer,
};
use std::fmt::{self, Display};
#[allow(missing_docs)]
pub fn serialize<T, S>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
where
T: Serialize,
S: Serializer,
{
value.serialize(SingletonMapRecursive {
delegate: serializer,
})
}
#[allow(missing_docs)]
pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
where
T: Deserialize<'de>,
D: Deserializer<'de>,
{
T::deserialize(SingletonMapRecursive {
delegate: deserializer,
})
}
struct SingletonMapRecursive<D> {
delegate: D,
}
impl<D> Serialize for SingletonMapRecursive<D>
where
D: Serialize,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
self.delegate.serialize(SingletonMapRecursive {
delegate: serializer,
})
}
}
impl<D> Serializer for SingletonMapRecursive<D>
where
D: Serializer,
{
type Ok = D::Ok;
type Error = D::Error;
type SerializeSeq = SingletonMapRecursive<D::SerializeSeq>;
type SerializeTuple = SingletonMapRecursive<D::SerializeTuple>;
type SerializeTupleStruct = SingletonMapRecursive<D::SerializeTupleStruct>;
type SerializeTupleVariant = SerializeTupleVariantAsSingletonMapRecursive<D::SerializeMap>;
type SerializeMap = SingletonMapRecursive<D::SerializeMap>;
type SerializeStruct = SingletonMapRecursive<D::SerializeStruct>;
type SerializeStructVariant =
SerializeStructVariantAsSingletonMapRecursive<D::SerializeMap>;
fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_bool(v)
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i8(v)
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i16(v)
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i32(v)
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i64(v)
}
fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i128(v)
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u8(v)
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u16(v)
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u32(v)
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u64(v)
}
fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u128(v)
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_f32(v)
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_f64(v)
}
fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_char(v)
}
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_str(v)
}
fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_bytes(v)
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_unit()
}
fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_unit_struct(name)
}
fn serialize_unit_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
self.delegate
.serialize_unit_variant(name, variant_index, variant)
}
fn serialize_newtype_struct<T>(
self,
name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
self.delegate
.serialize_newtype_struct(name, &SingletonMapRecursive { delegate: value })
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_entry(variant, &SingletonMapRecursive { delegate: value })?;
map.end()
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_none()
}
fn serialize_some<V>(self, value: &V) -> Result<Self::Ok, Self::Error>
where
V: ?Sized + Serialize,
{
self.delegate
.serialize_some(&SingletonMapRecursive { delegate: value })
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_seq(len)?,
})
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_tuple(len)?,
})
}
fn serialize_tuple_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_tuple_struct(name, len)?,
})
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_key(variant)?;
let sequence = Sequence::with_capacity(len);
Ok(SerializeTupleVariantAsSingletonMapRecursive { map, sequence })
}
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_map(len)?,
})
}
fn serialize_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_struct(name, len)?,
})
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_key(variant)?;
let mapping = Mapping::with_capacity(len);
Ok(SerializeStructVariantAsSingletonMapRecursive { map, mapping })
}
sourcepub fn reserve(&mut self, additional: usize)
pub fn reserve(&mut self, additional: usize)
Reserves capacity for at least additional
more elements to be inserted
into the map. The map may reserve more space to avoid frequent
allocations.
Panics
Panics if the new allocation size overflows usize
.
sourcepub fn shrink_to_fit(&mut self)
pub fn shrink_to_fit(&mut self)
Shrinks the capacity of the map as much as possible. It will drop down as much as possible while maintaining the internal rules and possibly leaving some space in accordance with the resize policy.
sourcepub fn insert(&mut self, k: Value, v: Value) -> Option<Value>
pub fn insert(&mut self, k: Value, v: Value) -> Option<Value>
Inserts a key-value pair into the map. If the key already existed, the old value is returned.
Examples found in repository?
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fn serialize_field<T>(&mut self, name: &'static str, field: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = field
.serialize(crate::value::Serializer)
.map_err(ser::Error::custom)?;
self.mapping.insert(Value::String(name.to_owned()), value);
Ok(())
}
fn end(mut self) -> Result<Self::Ok, Self::Error> {
self.map.serialize_value(&self.mapping)?;
self.map.end()
}
}
impl<'de, D> Deserializer<'de> for SingletonMap<D>
where
D: Deserializer<'de>,
{
type Error = D::Error;
fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_any(visitor)
}
fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_bool(visitor)
}
fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i8(visitor)
}
fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i16(visitor)
}
fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i32(visitor)
}
fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i64(visitor)
}
fn deserialize_i128<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_i128(visitor)
}
fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u8(visitor)
}
fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u16(visitor)
}
fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u32(visitor)
}
fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u64(visitor)
}
fn deserialize_u128<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_u128(visitor)
}
fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_f32(visitor)
}
fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_f64(visitor)
}
fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_char(visitor)
}
fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_str(visitor)
}
fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_string(visitor)
}
fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_bytes(visitor)
}
fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_byte_buf(visitor)
}
fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_option(SingletonMapAsEnum {
name: "",
delegate: visitor,
})
}
fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_unit(visitor)
}
fn deserialize_unit_struct<V>(
self,
name: &'static str,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_unit_struct(name, visitor)
}
fn deserialize_newtype_struct<V>(
self,
name: &'static str,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_newtype_struct(name, visitor)
}
fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_seq(visitor)
}
fn deserialize_tuple<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_tuple(len, visitor)
}
fn deserialize_tuple_struct<V>(
self,
name: &'static str,
len: usize,
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_tuple_struct(name, len, visitor)
}
fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_map(visitor)
}
fn deserialize_struct<V>(
self,
name: &'static str,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_struct(name, fields, visitor)
}
fn deserialize_enum<V>(
self,
name: &'static str,
_variants: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_any(SingletonMapAsEnum {
name,
delegate: visitor,
})
}
fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_identifier(visitor)
}
fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
self.delegate.deserialize_ignored_any(visitor)
}
}
struct SingletonMapAsEnum<D> {
name: &'static str,
delegate: D,
}
impl<'de, V> Visitor<'de> for SingletonMapAsEnum<V>
where
V: Visitor<'de>,
{
type Value = V::Value;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
self.delegate.expecting(formatter)
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate.visit_enum(de::value::StrDeserializer::new(v))
}
fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate
.visit_enum(de::value::BorrowedStrDeserializer::new(v))
}
fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate
.visit_enum(de::value::StringDeserializer::new(v))
}
fn visit_none<E>(self) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate.visit_none()
}
fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: Deserializer<'de>,
{
self.delegate.visit_some(SingletonMap {
delegate: deserializer,
})
}
fn visit_unit<E>(self) -> Result<Self::Value, E>
where
E: de::Error,
{
self.delegate.visit_unit()
}
fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
where
A: MapAccess<'de>,
{
self.delegate.visit_enum(SingletonMapAsEnum {
name: self.name,
delegate: map,
})
}
}
impl<'de, D> EnumAccess<'de> for SingletonMapAsEnum<D>
where
D: MapAccess<'de>,
{
type Error = D::Error;
type Variant = Self;
fn variant_seed<V>(mut self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
where
V: DeserializeSeed<'de>,
{
match self.delegate.next_key_seed(seed)? {
Some(value) => Ok((value, self)),
None => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
}
impl<'de, D> VariantAccess<'de> for SingletonMapAsEnum<D>
where
D: MapAccess<'de>,
{
type Error = D::Error;
fn unit_variant(self) -> Result<(), Self::Error> {
Err(de::Error::invalid_type(Unexpected::Map, &"unit variant"))
}
fn newtype_variant_seed<T>(mut self, seed: T) -> Result<T::Value, Self::Error>
where
T: DeserializeSeed<'de>,
{
let value = self.delegate.next_value_seed(seed)?;
match self.delegate.next_key()? {
None => Ok(value),
Some(IgnoredAny) => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
fn tuple_variant<V>(mut self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
let value = self
.delegate
.next_value_seed(TupleVariantSeed { len, visitor })?;
match self.delegate.next_key()? {
None => Ok(value),
Some(IgnoredAny) => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
fn struct_variant<V>(
mut self,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
let value = self.delegate.next_value_seed(StructVariantSeed {
name: self.name,
fields,
visitor,
})?;
match self.delegate.next_key()? {
None => Ok(value),
Some(IgnoredAny) => Err(de::Error::invalid_value(
Unexpected::Map,
&"map with a single key",
)),
}
}
}
struct TupleVariantSeed<V> {
len: usize,
visitor: V,
}
impl<'de, V> DeserializeSeed<'de> for TupleVariantSeed<V>
where
V: Visitor<'de>,
{
type Value = V::Value;
fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_tuple(self.len, self.visitor)
}
}
struct StructVariantSeed<V> {
name: &'static str,
fields: &'static [&'static str],
visitor: V,
}
impl<'de, V> DeserializeSeed<'de> for StructVariantSeed<V>
where
V: Visitor<'de>,
{
type Value = V::Value;
fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_struct(self.name, self.fields, self.visitor)
}
}
}
/// Apply [`singleton_map`] to *all* enums contained within the data structure.
///
/// # Example
///
/// ```
/// # use serde_derive::{Deserialize, Serialize};
/// use serde::{Deserialize, Serialize};
///
/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// enum Enum {
/// Int(i32),
/// }
///
/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// struct Inner {
/// a: Enum,
/// bs: Vec<Enum>,
/// }
///
/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// struct Outer {
/// tagged_style: Inner,
///
/// #[serde(with = "serde_yaml::with::singleton_map_recursive")]
/// singleton_map_style: Inner,
/// }
///
/// fn main() {
/// let object = Outer {
/// tagged_style: Inner {
/// a: Enum::Int(0),
/// bs: vec![Enum::Int(1)],
/// },
/// singleton_map_style: Inner {
/// a: Enum::Int(2),
/// bs: vec![Enum::Int(3)],
/// },
/// };
///
/// let yaml = serde_yaml::to_string(&object).unwrap();
/// print!("{}", yaml);
///
/// let deserialized: Outer = serde_yaml::from_str(&yaml).unwrap();
/// assert_eq!(object, deserialized);
/// }
/// ```
///
/// The serialized output is:
///
/// ```yaml
/// tagged_style:
/// a: !Int 0
/// bs:
/// - !Int 1
/// singleton_map_style:
/// a:
/// Int: 2
/// bs:
/// - Int: 3
/// ```
///
/// This module can also be used for the top-level serializer or deserializer
/// call, without `serde(with = …)`, as follows.
///
/// ```
/// # use serde_derive::{Deserialize, Serialize};
/// # use serde::{Deserialize, Serialize};
/// #
/// # #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// # enum Enum {
/// # Int(i32),
/// # }
/// #
/// # #[derive(Serialize, Deserialize, PartialEq, Debug)]
/// # struct Inner {
/// # a: Enum,
/// # bs: Vec<Enum>,
/// # }
/// #
/// use std::io::{self, Write};
///
/// fn main() {
/// let object = Inner {
/// a: Enum::Int(0),
/// bs: vec![Enum::Int(1)],
/// };
///
/// let mut buf = Vec::new();
/// let mut serializer = serde_yaml::Serializer::new(&mut buf);
/// serde_yaml::with::singleton_map_recursive::serialize(&object, &mut serializer).unwrap();
/// io::stdout().write_all(&buf).unwrap();
///
/// let deserializer = serde_yaml::Deserializer::from_slice(&buf);
/// let deserialized: Inner = serde_yaml::with::singleton_map_recursive::deserialize(deserializer).unwrap();
/// assert_eq!(object, deserialized);
/// }
/// ```
pub mod singleton_map_recursive {
use crate::value::{Mapping, Sequence, Value};
use serde::de::{
self, Deserialize, DeserializeSeed, Deserializer, EnumAccess, IgnoredAny, MapAccess,
SeqAccess, Unexpected, VariantAccess, Visitor,
};
use serde::ser::{
self, Serialize, SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant,
SerializeTuple, SerializeTupleStruct, SerializeTupleVariant, Serializer,
};
use std::fmt::{self, Display};
#[allow(missing_docs)]
pub fn serialize<T, S>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
where
T: Serialize,
S: Serializer,
{
value.serialize(SingletonMapRecursive {
delegate: serializer,
})
}
#[allow(missing_docs)]
pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
where
T: Deserialize<'de>,
D: Deserializer<'de>,
{
T::deserialize(SingletonMapRecursive {
delegate: deserializer,
})
}
struct SingletonMapRecursive<D> {
delegate: D,
}
impl<D> Serialize for SingletonMapRecursive<D>
where
D: Serialize,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
self.delegate.serialize(SingletonMapRecursive {
delegate: serializer,
})
}
}
impl<D> Serializer for SingletonMapRecursive<D>
where
D: Serializer,
{
type Ok = D::Ok;
type Error = D::Error;
type SerializeSeq = SingletonMapRecursive<D::SerializeSeq>;
type SerializeTuple = SingletonMapRecursive<D::SerializeTuple>;
type SerializeTupleStruct = SingletonMapRecursive<D::SerializeTupleStruct>;
type SerializeTupleVariant = SerializeTupleVariantAsSingletonMapRecursive<D::SerializeMap>;
type SerializeMap = SingletonMapRecursive<D::SerializeMap>;
type SerializeStruct = SingletonMapRecursive<D::SerializeStruct>;
type SerializeStructVariant =
SerializeStructVariantAsSingletonMapRecursive<D::SerializeMap>;
fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_bool(v)
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i8(v)
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i16(v)
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i32(v)
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i64(v)
}
fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_i128(v)
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u8(v)
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u16(v)
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u32(v)
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u64(v)
}
fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_u128(v)
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_f32(v)
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_f64(v)
}
fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_char(v)
}
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_str(v)
}
fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_bytes(v)
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_unit()
}
fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_unit_struct(name)
}
fn serialize_unit_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
self.delegate
.serialize_unit_variant(name, variant_index, variant)
}
fn serialize_newtype_struct<T>(
self,
name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
self.delegate
.serialize_newtype_struct(name, &SingletonMapRecursive { delegate: value })
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_entry(variant, &SingletonMapRecursive { delegate: value })?;
map.end()
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
self.delegate.serialize_none()
}
fn serialize_some<V>(self, value: &V) -> Result<Self::Ok, Self::Error>
where
V: ?Sized + Serialize,
{
self.delegate
.serialize_some(&SingletonMapRecursive { delegate: value })
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_seq(len)?,
})
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_tuple(len)?,
})
}
fn serialize_tuple_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_tuple_struct(name, len)?,
})
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_key(variant)?;
let sequence = Sequence::with_capacity(len);
Ok(SerializeTupleVariantAsSingletonMapRecursive { map, sequence })
}
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_map(len)?,
})
}
fn serialize_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Ok(SingletonMapRecursive {
delegate: self.delegate.serialize_struct(name, len)?,
})
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
let mut map = self.delegate.serialize_map(Some(1))?;
map.serialize_key(variant)?;
let mapping = Mapping::with_capacity(len);
Ok(SerializeStructVariantAsSingletonMapRecursive { map, mapping })
}
fn collect_str<T>(self, value: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Display,
{
self.delegate.collect_str(value)
}
}
impl<D> SerializeSeq for SingletonMapRecursive<D>
where
D: SerializeSeq,
{
type Ok = D::Ok;
type Error = D::Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<(), Self::Error>
where
T: ?Sized + ser::Serialize,
{
self.delegate
.serialize_element(&SingletonMapRecursive { delegate: elem })
}
fn end(self) -> Result<Self::Ok, Self::Error> {
self.delegate.end()
}
}
impl<D> SerializeTuple for SingletonMapRecursive<D>
where
D: SerializeTuple,
{
type Ok = D::Ok;
type Error = D::Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<(), Self::Error>
where
T: ?Sized + ser::Serialize,
{
self.delegate
.serialize_element(&SingletonMapRecursive { delegate: elem })
}
fn end(self) -> Result<Self::Ok, Self::Error> {
self.delegate.end()
}
}
impl<D> SerializeTupleStruct for SingletonMapRecursive<D>
where
D: SerializeTupleStruct,
{
type Ok = D::Ok;
type Error = D::Error;
fn serialize_field<V>(&mut self, value: &V) -> Result<(), Self::Error>
where
V: ?Sized + ser::Serialize,
{
self.delegate
.serialize_field(&SingletonMapRecursive { delegate: value })
}
fn end(self) -> Result<Self::Ok, Self::Error> {
self.delegate.end()
}
}
struct SerializeTupleVariantAsSingletonMapRecursive<M> {
map: M,
sequence: Sequence,
}
impl<M> SerializeTupleVariant for SerializeTupleVariantAsSingletonMapRecursive<M>
where
M: SerializeMap,
{
type Ok = M::Ok;
type Error = M::Error;
fn serialize_field<T>(&mut self, field: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = field
.serialize(SingletonMapRecursive {
delegate: crate::value::Serializer,
})
.map_err(ser::Error::custom)?;
self.sequence.push(value);
Ok(())
}
fn end(mut self) -> Result<Self::Ok, Self::Error> {
self.map.serialize_value(&self.sequence)?;
self.map.end()
}
}
impl<D> SerializeMap for SingletonMapRecursive<D>
where
D: SerializeMap,
{
type Ok = D::Ok;
type Error = D::Error;
fn serialize_key<T>(&mut self, key: &T) -> Result<(), Self::Error>
where
T: ?Sized + ser::Serialize,
{
self.delegate
.serialize_key(&SingletonMapRecursive { delegate: key })
}
fn serialize_value<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: ?Sized + ser::Serialize,
{
self.delegate
.serialize_value(&SingletonMapRecursive { delegate: value })
}
fn serialize_entry<K, V>(&mut self, key: &K, value: &V) -> Result<(), Self::Error>
where
K: ?Sized + ser::Serialize,
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_entry(
&SingletonMapRecursive { delegate: key },
&SingletonMapRecursive { delegate: value },
)
}
fn end(self) -> Result<Self::Ok, Self::Error> {
self.delegate.end()
}
}
impl<D> SerializeStruct for SingletonMapRecursive<D>
where
D: SerializeStruct,
{
type Ok = D::Ok;
type Error = D::Error;
fn serialize_field<V>(&mut self, key: &'static str, value: &V) -> Result<(), Self::Error>
where
V: ?Sized + ser::Serialize,
{
self.delegate
.serialize_field(key, &SingletonMapRecursive { delegate: value })
}
fn end(self) -> Result<Self::Ok, Self::Error> {
self.delegate.end()
}
}
struct SerializeStructVariantAsSingletonMapRecursive<M> {
map: M,
mapping: Mapping,
}
impl<M> SerializeStructVariant for SerializeStructVariantAsSingletonMapRecursive<M>
where
M: SerializeMap,
{
type Ok = M::Ok;
type Error = M::Error;
fn serialize_field<T>(&mut self, name: &'static str, field: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = field
.serialize(SingletonMapRecursive {
delegate: crate::value::Serializer,
})
.map_err(ser::Error::custom)?;
self.mapping.insert(Value::String(name.to_owned()), value);
Ok(())
}
More examples
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fn serialize_key<T>(&mut self, key: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
let key = Some(to_value(key)?);
match self {
SerializeMap::CheckForTag => {
*self = SerializeMap::Untagged {
mapping: Mapping::new(),
next_key: key,
};
}
SerializeMap::Tagged(tagged) => {
let mut mapping = Mapping::new();
mapping.insert(
Value::String(tagged.tag.to_string()),
mem::take(&mut tagged.value),
);
*self = SerializeMap::Untagged {
mapping,
next_key: key,
};
}
SerializeMap::Untagged { next_key, .. } => *next_key = key,
}
Ok(())
}
fn serialize_value<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
let (mapping, key) = match self {
SerializeMap::CheckForTag | SerializeMap::Tagged(_) => unreachable!(),
SerializeMap::Untagged { mapping, next_key } => (mapping, next_key),
};
match key.take() {
Some(key) => mapping.insert(key, to_value(value)?),
None => panic!("serialize_value called before serialize_key"),
};
Ok(())
}
fn serialize_entry<K, V>(&mut self, key: &K, value: &V) -> Result<()>
where
K: ?Sized + ser::Serialize,
V: ?Sized + ser::Serialize,
{
struct CheckForTag;
struct NotTag<T> {
delegate: T,
}
impl ser::Serializer for CheckForTag {
type Ok = MaybeTag<Value>;
type Error = Error;
type SerializeSeq = NotTag<SerializeArray>;
type SerializeTuple = NotTag<SerializeArray>;
type SerializeTupleStruct = NotTag<SerializeArray>;
type SerializeTupleVariant = NotTag<SerializeTupleVariant>;
type SerializeMap = NotTag<SerializeMap>;
type SerializeStruct = NotTag<SerializeStruct>;
type SerializeStructVariant = NotTag<SerializeStructVariant>;
fn serialize_bool(self, v: bool) -> Result<Self::Ok> {
Serializer.serialize_bool(v).map(MaybeTag::NotTag)
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok> {
Serializer.serialize_i8(v).map(MaybeTag::NotTag)
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok> {
Serializer.serialize_i16(v).map(MaybeTag::NotTag)
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok> {
Serializer.serialize_i32(v).map(MaybeTag::NotTag)
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok> {
Serializer.serialize_i64(v).map(MaybeTag::NotTag)
}
fn serialize_i128(self, v: i128) -> Result<Self::Ok> {
Serializer.serialize_i128(v).map(MaybeTag::NotTag)
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok> {
Serializer.serialize_u8(v).map(MaybeTag::NotTag)
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok> {
Serializer.serialize_u16(v).map(MaybeTag::NotTag)
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok> {
Serializer.serialize_u32(v).map(MaybeTag::NotTag)
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok> {
Serializer.serialize_u64(v).map(MaybeTag::NotTag)
}
fn serialize_u128(self, v: u128) -> Result<Self::Ok> {
Serializer.serialize_u128(v).map(MaybeTag::NotTag)
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok> {
Serializer.serialize_f32(v).map(MaybeTag::NotTag)
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok> {
Serializer.serialize_f64(v).map(MaybeTag::NotTag)
}
fn serialize_char(self, value: char) -> Result<Self::Ok> {
Serializer.serialize_char(value).map(MaybeTag::NotTag)
}
fn serialize_str(self, value: &str) -> Result<Self::Ok> {
Serializer.serialize_str(value).map(MaybeTag::NotTag)
}
fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok> {
Serializer.serialize_bytes(value).map(MaybeTag::NotTag)
}
fn serialize_unit(self) -> Result<Self::Ok> {
Serializer.serialize_unit().map(MaybeTag::NotTag)
}
fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok> {
Serializer.serialize_unit_struct(name).map(MaybeTag::NotTag)
}
fn serialize_unit_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok> {
Serializer
.serialize_unit_variant(name, variant_index, variant)
.map(MaybeTag::NotTag)
}
fn serialize_newtype_struct<T>(self, name: &'static str, value: &T) -> Result<Self::Ok>
where
T: ?Sized + ser::Serialize,
{
Serializer
.serialize_newtype_struct(name, value)
.map(MaybeTag::NotTag)
}
fn serialize_newtype_variant<T>(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok>
where
T: ?Sized + ser::Serialize,
{
Serializer
.serialize_newtype_variant(name, variant_index, variant, value)
.map(MaybeTag::NotTag)
}
fn serialize_none(self) -> Result<Self::Ok> {
Serializer.serialize_none().map(MaybeTag::NotTag)
}
fn serialize_some<V>(self, value: &V) -> Result<Self::Ok>
where
V: ?Sized + ser::Serialize,
{
Serializer.serialize_some(value).map(MaybeTag::NotTag)
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
Ok(NotTag {
delegate: Serializer.serialize_seq(len)?,
})
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
Ok(NotTag {
delegate: Serializer.serialize_tuple(len)?,
})
}
fn serialize_tuple_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct> {
Ok(NotTag {
delegate: Serializer.serialize_tuple_struct(name, len)?,
})
}
fn serialize_tuple_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant> {
Ok(NotTag {
delegate: Serializer.serialize_tuple_variant(
name,
variant_index,
variant,
len,
)?,
})
}
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap> {
Ok(NotTag {
delegate: Serializer.serialize_map(len)?,
})
}
fn serialize_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct> {
Ok(NotTag {
delegate: Serializer.serialize_struct(name, len)?,
})
}
fn serialize_struct_variant(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeStructVariant> {
Ok(NotTag {
delegate: Serializer.serialize_struct_variant(
name,
variant_index,
variant,
len,
)?,
})
}
fn collect_str<T>(self, value: &T) -> Result<Self::Ok>
where
T: ?Sized + Display,
{
Ok(match tagged::check_for_tag(value) {
MaybeTag::Tag(tag) => MaybeTag::Tag(tag),
MaybeTag::NotTag(string) => MaybeTag::NotTag(Value::String(string)),
})
}
}
impl ser::SerializeSeq for NotTag<SerializeArray> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_element(elem)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeTuple for NotTag<SerializeArray> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_element<T>(&mut self, elem: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_element(elem)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeTupleStruct for NotTag<SerializeArray> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, value: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(value)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeTupleVariant for NotTag<SerializeTupleVariant> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, v: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(v)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeMap for NotTag<SerializeMap> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_key<T>(&mut self, key: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_key(key)
}
fn serialize_value<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + ser::Serialize,
{
self.delegate.serialize_value(value)
}
fn serialize_entry<K, V>(&mut self, key: &K, value: &V) -> Result<()>
where
K: ?Sized + ser::Serialize,
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_entry(key, value)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeStruct for NotTag<SerializeStruct> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, key: &'static str, value: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(key, value)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
impl ser::SerializeStructVariant for NotTag<SerializeStructVariant> {
type Ok = MaybeTag<Value>;
type Error = Error;
fn serialize_field<V>(&mut self, field: &'static str, v: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.delegate.serialize_field(field, v)
}
fn end(self) -> Result<Self::Ok> {
self.delegate.end().map(MaybeTag::NotTag)
}
}
match self {
SerializeMap::CheckForTag => {
let key = key.serialize(CheckForTag)?;
let mut mapping = Mapping::new();
*self = match key {
MaybeTag::Tag(string) => SerializeMap::Tagged(TaggedValue {
tag: Tag::new(string),
value: to_value(value)?,
}),
MaybeTag::NotTag(key) => {
mapping.insert(key, to_value(value)?);
SerializeMap::Untagged {
mapping,
next_key: None,
}
}
};
}
SerializeMap::Tagged(tagged) => {
let mut mapping = Mapping::new();
mapping.insert(
Value::String(tagged.tag.to_string()),
mem::take(&mut tagged.value),
);
mapping.insert(to_value(key)?, to_value(value)?);
*self = SerializeMap::Untagged {
mapping,
next_key: None,
};
}
SerializeMap::Untagged { mapping, .. } => {
mapping.insert(to_value(key)?, to_value(value)?);
}
}
Ok(())
}
fn end(self) -> Result<Value> {
Ok(match self {
SerializeMap::CheckForTag => Value::Mapping(Mapping::new()),
SerializeMap::Tagged(tagged) => Value::Tagged(Box::new(tagged)),
SerializeMap::Untagged { mapping, .. } => Value::Mapping(mapping),
})
}
}
pub struct SerializeStruct {
mapping: Mapping,
}
impl ser::SerializeStruct for SerializeStruct {
type Ok = Value;
type Error = Error;
fn serialize_field<V>(&mut self, key: &'static str, value: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.mapping.insert(to_value(key)?, to_value(value)?);
Ok(())
}
fn end(self) -> Result<Value> {
Ok(Value::Mapping(self.mapping))
}
}
pub struct SerializeStructVariant {
tag: &'static str,
mapping: Mapping,
}
impl ser::SerializeStructVariant for SerializeStructVariant {
type Ok = Value;
type Error = Error;
fn serialize_field<V>(&mut self, field: &'static str, v: &V) -> Result<()>
where
V: ?Sized + ser::Serialize,
{
self.mapping.insert(to_value(field)?, to_value(v)?);
Ok(())
}
sourcepub fn contains_key<I: Index>(&self, index: I) -> bool
pub fn contains_key<I: Index>(&self, index: I) -> bool
Checks if the map contains the given key.
sourcepub fn get<I: Index>(&self, index: I) -> Option<&Value>
pub fn get<I: Index>(&self, index: I) -> Option<&Value>
Returns the value corresponding to the key in the map.
Examples found in repository?
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
fn index_into<'v>(&self, v: &'v Value) -> Option<&'v Value> {
match v.untag_ref() {
Value::Sequence(vec) => vec.get(*self),
Value::Mapping(vec) => vec.get(&Value::Number((*self).into())),
_ => None,
}
}
fn index_into_mut<'v>(&self, v: &'v mut Value) -> Option<&'v mut Value> {
match v.untag_mut() {
Value::Sequence(vec) => vec.get_mut(*self),
Value::Mapping(vec) => vec.get_mut(&Value::Number((*self).into())),
_ => None,
}
}
fn index_or_insert<'v>(&self, mut v: &'v mut Value) -> &'v mut Value {
loop {
match v {
Value::Sequence(vec) => {
let len = vec.len();
return vec.get_mut(*self).unwrap_or_else(|| {
panic!(
"cannot access index {} of YAML sequence of length {}",
self, len
)
});
}
Value::Mapping(map) => {
let n = Value::Number((*self).into());
return map.entry(n).or_insert(Value::Null);
}
Value::Tagged(tagged) => v = &mut tagged.value,
_ => panic!("cannot access index {} of YAML {}", self, Type(v)),
}
}
}
}
fn index_into_mapping<'v, I>(index: &I, v: &'v Value) -> Option<&'v Value>
where
I: ?Sized + mapping::Index,
{
match v.untag_ref() {
Value::Mapping(map) => map.get(index),
_ => None,
}
}
sourcepub fn get_mut<I: Index>(&mut self, index: I) -> Option<&mut Value>
pub fn get_mut<I: Index>(&mut self, index: I) -> Option<&mut Value>
Returns the mutable reference corresponding to the key in the map.
Examples found in repository?
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84
fn index_into_mut<'v>(&self, v: &'v mut Value) -> Option<&'v mut Value> {
match v.untag_mut() {
Value::Sequence(vec) => vec.get_mut(*self),
Value::Mapping(vec) => vec.get_mut(&Value::Number((*self).into())),
_ => None,
}
}
fn index_or_insert<'v>(&self, mut v: &'v mut Value) -> &'v mut Value {
loop {
match v {
Value::Sequence(vec) => {
let len = vec.len();
return vec.get_mut(*self).unwrap_or_else(|| {
panic!(
"cannot access index {} of YAML sequence of length {}",
self, len
)
});
}
Value::Mapping(map) => {
let n = Value::Number((*self).into());
return map.entry(n).or_insert(Value::Null);
}
Value::Tagged(tagged) => v = &mut tagged.value,
_ => panic!("cannot access index {} of YAML {}", self, Type(v)),
}
}
}
}
fn index_into_mapping<'v, I>(index: &I, v: &'v Value) -> Option<&'v Value>
where
I: ?Sized + mapping::Index,
{
match v.untag_ref() {
Value::Mapping(map) => map.get(index),
_ => None,
}
}
fn index_into_mut_mapping<'v, I>(index: &I, v: &'v mut Value) -> Option<&'v mut Value>
where
I: ?Sized + mapping::Index,
{
match v.untag_mut() {
Value::Mapping(map) => map.get_mut(index),
_ => None,
}
}
sourcepub fn entry(&mut self, k: Value) -> Entry<'_>
pub fn entry(&mut self, k: Value) -> Entry<'_>
Gets the given key’s corresponding entry in the map for insertion and/or in-place manipulation.
Examples found in repository?
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fn visit_map<A>(self, mut data: A) -> Result<Self::Value, A::Error>
where
A: serde::de::MapAccess<'de>,
{
let mut mapping = Mapping::new();
while let Some(key) = data.next_key()? {
match mapping.entry(key) {
Entry::Occupied(entry) => {
return Err(serde::de::Error::custom(DuplicateKeyError { entry }));
}
Entry::Vacant(entry) => {
let value = data.next_value()?;
entry.insert(value);
}
}
}
Ok(mapping)
}
More examples
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fn index_or_insert<'v>(&self, mut v: &'v mut Value) -> &'v mut Value {
loop {
match v {
Value::Sequence(vec) => {
let len = vec.len();
return vec.get_mut(*self).unwrap_or_else(|| {
panic!(
"cannot access index {} of YAML sequence of length {}",
self, len
)
});
}
Value::Mapping(map) => {
let n = Value::Number((*self).into());
return map.entry(n).or_insert(Value::Null);
}
Value::Tagged(tagged) => v = &mut tagged.value,
_ => panic!("cannot access index {} of YAML {}", self, Type(v)),
}
}
}
}
fn index_into_mapping<'v, I>(index: &I, v: &'v Value) -> Option<&'v Value>
where
I: ?Sized + mapping::Index,
{
match v.untag_ref() {
Value::Mapping(map) => map.get(index),
_ => None,
}
}
fn index_into_mut_mapping<'v, I>(index: &I, v: &'v mut Value) -> Option<&'v mut Value>
where
I: ?Sized + mapping::Index,
{
match v.untag_mut() {
Value::Mapping(map) => map.get_mut(index),
_ => None,
}
}
fn index_or_insert_mapping<'v, I>(index: &I, mut v: &'v mut Value) -> &'v mut Value
where
I: ?Sized + mapping::Index + ToOwned + Debug,
Value: From<I::Owned>,
{
if let Value::Null = *v {
*v = Value::Mapping(Mapping::new());
return match v {
Value::Mapping(map) => match map.entry(index.to_owned().into()) {
Entry::Vacant(entry) => entry.insert(Value::Null),
Entry::Occupied(_) => unreachable!(),
},
_ => unreachable!(),
};
}
loop {
match v {
Value::Mapping(map) => {
return map.entry(index.to_owned().into()).or_insert(Value::Null);
}
Value::Tagged(tagged) => v = &mut tagged.value,
_ => panic!("cannot access key {:?} in YAML {}", index, Type(v)),
}
}
}
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pub fn apply_merge(&mut self) -> Result<(), Error> {
let mut stack = Vec::new();
stack.push(self);
while let Some(node) = stack.pop() {
match node {
Value::Mapping(mapping) => {
match mapping.remove("<<") {
Some(Value::Mapping(merge)) => {
for (k, v) in merge {
mapping.entry(k).or_insert(v);
}
}
Some(Value::Sequence(sequence)) => {
for value in sequence {
match value {
Value::Mapping(merge) => {
for (k, v) in merge {
mapping.entry(k).or_insert(v);
}
}
Value::Sequence(_) => {
return Err(error::new(ErrorImpl::SequenceInMergeElement));
}
Value::Tagged(_) => {
return Err(error::new(ErrorImpl::TaggedInMerge));
}
_unexpected => {
return Err(error::new(ErrorImpl::ScalarInMergeElement));
}
}
}
}
None => {}
Some(Value::Tagged(_)) => return Err(error::new(ErrorImpl::TaggedInMerge)),
Some(_unexpected) => return Err(error::new(ErrorImpl::ScalarInMerge)),
}
stack.extend(mapping.values_mut());
}
Value::Sequence(sequence) => stack.extend(sequence),
Value::Tagged(tagged) => stack.push(&mut tagged.value),
_ => {}
}
}
Ok(())
}
sourcepub fn remove<I: Index>(&mut self, index: I) -> Option<Value>
pub fn remove<I: Index>(&mut self, index: I) -> Option<Value>
Removes and returns the value corresponding to the key from the map.
Examples found in repository?
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pub fn apply_merge(&mut self) -> Result<(), Error> {
let mut stack = Vec::new();
stack.push(self);
while let Some(node) = stack.pop() {
match node {
Value::Mapping(mapping) => {
match mapping.remove("<<") {
Some(Value::Mapping(merge)) => {
for (k, v) in merge {
mapping.entry(k).or_insert(v);
}
}
Some(Value::Sequence(sequence)) => {
for value in sequence {
match value {
Value::Mapping(merge) => {
for (k, v) in merge {
mapping.entry(k).or_insert(v);
}
}
Value::Sequence(_) => {
return Err(error::new(ErrorImpl::SequenceInMergeElement));
}
Value::Tagged(_) => {
return Err(error::new(ErrorImpl::TaggedInMerge));
}
_unexpected => {
return Err(error::new(ErrorImpl::ScalarInMergeElement));
}
}
}
}
None => {}
Some(Value::Tagged(_)) => return Err(error::new(ErrorImpl::TaggedInMerge)),
Some(_unexpected) => return Err(error::new(ErrorImpl::ScalarInMerge)),
}
stack.extend(mapping.values_mut());
}
Value::Sequence(sequence) => stack.extend(sequence),
Value::Tagged(tagged) => stack.push(&mut tagged.value),
_ => {}
}
}
Ok(())
}
sourcepub fn remove_entry<I: Index>(&mut self, index: I) -> Option<(Value, Value)>
pub fn remove_entry<I: Index>(&mut self, index: I) -> Option<(Value, Value)>
Remove and return the key-value pair.
sourcepub fn retain<F>(&mut self, keep: F)where
F: FnMut(&Value, &mut Value) -> bool,
pub fn retain<F>(&mut self, keep: F)where
F: FnMut(&Value, &mut Value) -> bool,
Scan through each key-value pair in the map and keep those where the
closure keep
returns true.
sourcepub fn capacity(&self) -> usize
pub fn capacity(&self) -> usize
Returns the maximum number of key-value pairs the map can hold without reallocating.
sourcepub fn len(&self) -> usize
pub fn len(&self) -> usize
Returns the number of key-value pairs in the map.
Examples found in repository?
More examples
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fn visit_mapping<'de, V>(mapping: Mapping, visitor: V) -> Result<V::Value, Error>
where
V: Visitor<'de>,
{
let len = mapping.len();
let mut deserializer = MapDeserializer::new(mapping);
let map = visitor.visit_map(&mut deserializer)?;
let remaining = deserializer.iter.len();
if remaining == 0 {
Ok(map)
} else {
Err(Error::invalid_length(len, &"fewer elements in map"))
}
}
fn visit_mapping_ref<'de, V>(mapping: &'de Mapping, visitor: V) -> Result<V::Value, Error>
where
V: Visitor<'de>,
{
let len = mapping.len();
let mut deserializer = MapRefDeserializer::new(mapping);
let map = visitor.visit_map(&mut deserializer)?;
let remaining = deserializer.iter.unwrap().len();
if remaining == 0 {
Ok(map)
} else {
Err(Error::invalid_length(len, &"fewer elements in map"))
}
}
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
match self {
Value::Null => serializer.serialize_unit(),
Value::Bool(b) => serializer.serialize_bool(*b),
Value::Number(n) => n.serialize(serializer),
Value::String(s) => serializer.serialize_str(s),
Value::Sequence(seq) => seq.serialize(serializer),
Value::Mapping(mapping) => {
use serde::ser::SerializeMap;
let mut map = serializer.serialize_map(Some(mapping.len()))?;
for (k, v) in mapping {
map.serialize_entry(k, v)?;
}
map.end()
}
Value::Tagged(tagged) => tagged.serialize(serializer),
}
}
sourcepub fn iter(&self) -> Iter<'_> ⓘ
pub fn iter(&self) -> Iter<'_> ⓘ
Returns a double-ended iterator visiting all key-value pairs in order of
insertion. Iterator element type is (&'a Value, &'a Value)
.
sourcepub fn iter_mut(&mut self) -> IterMut<'_> ⓘ
pub fn iter_mut(&mut self) -> IterMut<'_> ⓘ
Returns a double-ended iterator visiting all key-value pairs in order of
insertion. Iterator element type is (&'a Value, &'a mut ValuE)
.
sourcepub fn values_mut(&mut self) -> ValuesMut<'_> ⓘ
pub fn values_mut(&mut self) -> ValuesMut<'_> ⓘ
Return an iterator over mutable references to the values of the map.
Examples found in repository?
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pub fn apply_merge(&mut self) -> Result<(), Error> {
let mut stack = Vec::new();
stack.push(self);
while let Some(node) = stack.pop() {
match node {
Value::Mapping(mapping) => {
match mapping.remove("<<") {
Some(Value::Mapping(merge)) => {
for (k, v) in merge {
mapping.entry(k).or_insert(v);
}
}
Some(Value::Sequence(sequence)) => {
for value in sequence {
match value {
Value::Mapping(merge) => {
for (k, v) in merge {
mapping.entry(k).or_insert(v);
}
}
Value::Sequence(_) => {
return Err(error::new(ErrorImpl::SequenceInMergeElement));
}
Value::Tagged(_) => {
return Err(error::new(ErrorImpl::TaggedInMerge));
}
_unexpected => {
return Err(error::new(ErrorImpl::ScalarInMergeElement));
}
}
}
}
None => {}
Some(Value::Tagged(_)) => return Err(error::new(ErrorImpl::TaggedInMerge)),
Some(_unexpected) => return Err(error::new(ErrorImpl::ScalarInMerge)),
}
stack.extend(mapping.values_mut());
}
Value::Sequence(sequence) => stack.extend(sequence),
Value::Tagged(tagged) => stack.push(&mut tagged.value),
_ => {}
}
}
Ok(())
}
sourcepub fn into_values(self) -> IntoValues ⓘ
pub fn into_values(self) -> IntoValues ⓘ
Return an owning iterator over the values of the map.
Trait Implementations§
source§impl<'de> Deserialize<'de> for Mapping
impl<'de> Deserialize<'de> for Mapping
source§fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
source§impl Extend<(Value, Value)> for Mapping
impl Extend<(Value, Value)> for Mapping
source§fn extend<I: IntoIterator<Item = (Value, Value)>>(&mut self, iter: I)
fn extend<I: IntoIterator<Item = (Value, Value)>>(&mut self, iter: I)
source§fn extend_one(&mut self, item: A)
fn extend_one(&mut self, item: A)
extend_one
)source§fn extend_reserve(&mut self, additional: usize)
fn extend_reserve(&mut self, additional: usize)
extend_one
)source§impl<'a> IntoIterator for &'a Mapping
impl<'a> IntoIterator for &'a Mapping
source§impl<'a> IntoIterator for &'a mut Mapping
impl<'a> IntoIterator for &'a mut Mapping
source§impl IntoIterator for Mapping
impl IntoIterator for Mapping
source§impl PartialOrd<Mapping> for Mapping
impl PartialOrd<Mapping> for Mapping
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for Mapping
impl StructuralEq for Mapping
impl StructuralPartialEq for Mapping
Auto Trait Implementations§
impl RefUnwindSafe for Mapping
impl Send for Mapping
impl Sync for Mapping
impl Unpin for Mapping
impl UnwindSafe for Mapping
Blanket Implementations§
source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.