diff options
Diffstat (limited to 'vendor/serde_json/src/value/de.rs')
| -rw-r--r-- | vendor/serde_json/src/value/de.rs | 1419 |
1 files changed, 0 insertions, 1419 deletions
diff --git a/vendor/serde_json/src/value/de.rs b/vendor/serde_json/src/value/de.rs deleted file mode 100644 index 1e8b5ac..0000000 --- a/vendor/serde_json/src/value/de.rs +++ /dev/null @@ -1,1419 +0,0 @@ -use crate::error::{Error, ErrorCode}; -use crate::map::Map; -use crate::number::Number; -use crate::value::Value; -use alloc::borrow::{Cow, ToOwned}; -use alloc::string::String; -#[cfg(feature = "raw_value")] -use alloc::string::ToString; -use alloc::vec::{self, Vec}; -use core::fmt; -use core::slice; -use core::str::FromStr; -use serde::de::{ - self, Deserialize, DeserializeSeed, EnumAccess, Expected, IntoDeserializer, MapAccess, - SeqAccess, Unexpected, VariantAccess, Visitor, -}; -use serde::forward_to_deserialize_any; - -#[cfg(feature = "arbitrary_precision")] -use crate::number::NumberFromString; - -impl<'de> Deserialize<'de> for Value { - #[inline] - fn deserialize<D>(deserializer: D) -> Result<Value, D::Error> - where - D: serde::Deserializer<'de>, - { - struct ValueVisitor; - - impl<'de> Visitor<'de> for ValueVisitor { - type Value = Value; - - fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - formatter.write_str("any valid JSON value") - } - - #[inline] - fn visit_bool<E>(self, value: bool) -> Result<Value, E> { - Ok(Value::Bool(value)) - } - - #[inline] - fn visit_i64<E>(self, value: i64) -> Result<Value, E> { - Ok(Value::Number(value.into())) - } - - #[inline] - fn visit_u64<E>(self, value: u64) -> Result<Value, E> { - Ok(Value::Number(value.into())) - } - - #[inline] - fn visit_f64<E>(self, value: f64) -> Result<Value, E> { - Ok(Number::from_f64(value).map_or(Value::Null, Value::Number)) - } - - #[cfg(any(feature = "std", feature = "alloc"))] - #[inline] - fn visit_str<E>(self, value: &str) -> Result<Value, E> - where - E: serde::de::Error, - { - self.visit_string(String::from(value)) - } - - #[cfg(any(feature = "std", feature = "alloc"))] - #[inline] - fn visit_string<E>(self, value: String) -> Result<Value, E> { - Ok(Value::String(value)) - } - - #[inline] - fn visit_none<E>(self) -> Result<Value, E> { - Ok(Value::Null) - } - - #[inline] - fn visit_some<D>(self, deserializer: D) -> Result<Value, D::Error> - where - D: serde::Deserializer<'de>, - { - Deserialize::deserialize(deserializer) - } - - #[inline] - fn visit_unit<E>(self) -> Result<Value, E> { - Ok(Value::Null) - } - - #[inline] - fn visit_seq<V>(self, mut visitor: V) -> Result<Value, V::Error> - where - V: SeqAccess<'de>, - { - let mut vec = Vec::new(); - - while let Some(elem) = tri!(visitor.next_element()) { - vec.push(elem); - } - - Ok(Value::Array(vec)) - } - - #[cfg(any(feature = "std", feature = "alloc"))] - fn visit_map<V>(self, mut visitor: V) -> Result<Value, V::Error> - where - V: MapAccess<'de>, - { - match tri!(visitor.next_key_seed(KeyClassifier)) { - #[cfg(feature = "arbitrary_precision")] - Some(KeyClass::Number) => { - let number: NumberFromString = tri!(visitor.next_value()); - Ok(Value::Number(number.value)) - } - #[cfg(feature = "raw_value")] - Some(KeyClass::RawValue) => { - let value = tri!(visitor.next_value_seed(crate::raw::BoxedFromString)); - crate::from_str(value.get()).map_err(de::Error::custom) - } - Some(KeyClass::Map(first_key)) => { - let mut values = Map::new(); - - values.insert(first_key, tri!(visitor.next_value())); - while let Some((key, value)) = tri!(visitor.next_entry()) { - values.insert(key, value); - } - - Ok(Value::Object(values)) - } - None => Ok(Value::Object(Map::new())), - } - } - } - - deserializer.deserialize_any(ValueVisitor) - } -} - -impl FromStr for Value { - type Err = Error; - fn from_str(s: &str) -> Result<Value, Error> { - super::super::de::from_str(s) - } -} - -macro_rules! deserialize_number { - ($method:ident) => { - #[cfg(not(feature = "arbitrary_precision"))] - fn $method<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Number(n) => n.deserialize_any(visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - #[cfg(feature = "arbitrary_precision")] - fn $method<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Number(n) => n.$method(visitor), - _ => self.deserialize_any(visitor), - } - } - }; -} - -fn visit_array<'de, V>(array: Vec<Value>, visitor: V) -> Result<V::Value, Error> -where - V: Visitor<'de>, -{ - let len = array.len(); - let mut deserializer = SeqDeserializer::new(array); - let seq = tri!(visitor.visit_seq(&mut deserializer)); - let remaining = deserializer.iter.len(); - if remaining == 0 { - Ok(seq) - } else { - Err(serde::de::Error::invalid_length( - len, - &"fewer elements in array", - )) - } -} - -fn visit_object<'de, V>(object: Map<String, Value>, visitor: V) -> Result<V::Value, Error> -where - V: Visitor<'de>, -{ - let len = object.len(); - let mut deserializer = MapDeserializer::new(object); - let map = tri!(visitor.visit_map(&mut deserializer)); - let remaining = deserializer.iter.len(); - if remaining == 0 { - Ok(map) - } else { - Err(serde::de::Error::invalid_length( - len, - &"fewer elements in map", - )) - } -} - -impl<'de> serde::Deserializer<'de> for Value { - type Error = Error; - - #[inline] - fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Null => visitor.visit_unit(), - Value::Bool(v) => visitor.visit_bool(v), - Value::Number(n) => n.deserialize_any(visitor), - #[cfg(any(feature = "std", feature = "alloc"))] - Value::String(v) => visitor.visit_string(v), - Value::Array(v) => visit_array(v, visitor), - Value::Object(v) => visit_object(v, visitor), - } - } - - deserialize_number!(deserialize_i8); - deserialize_number!(deserialize_i16); - deserialize_number!(deserialize_i32); - deserialize_number!(deserialize_i64); - deserialize_number!(deserialize_i128); - deserialize_number!(deserialize_u8); - deserialize_number!(deserialize_u16); - deserialize_number!(deserialize_u32); - deserialize_number!(deserialize_u64); - deserialize_number!(deserialize_u128); - deserialize_number!(deserialize_f32); - deserialize_number!(deserialize_f64); - - #[inline] - fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Null => visitor.visit_none(), - _ => visitor.visit_some(self), - } - } - - #[inline] - fn deserialize_enum<V>( - self, - _name: &str, - _variants: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - let (variant, value) = match self { - Value::Object(value) => { - let mut iter = value.into_iter(); - let (variant, value) = match iter.next() { - Some(v) => v, - None => { - return Err(serde::de::Error::invalid_value( - Unexpected::Map, - &"map with a single key", - )); - } - }; - // enums are encoded in json as maps with a single key:value pair - if iter.next().is_some() { - return Err(serde::de::Error::invalid_value( - Unexpected::Map, - &"map with a single key", - )); - } - (variant, Some(value)) - } - Value::String(variant) => (variant, None), - other => { - return Err(serde::de::Error::invalid_type( - other.unexpected(), - &"string or map", - )); - } - }; - - visitor.visit_enum(EnumDeserializer { variant, value }) - } - - #[inline] - fn deserialize_newtype_struct<V>( - self, - name: &'static str, - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - #[cfg(feature = "raw_value")] - { - if name == crate::raw::TOKEN { - return visitor.visit_map(crate::raw::OwnedRawDeserializer { - raw_value: Some(self.to_string()), - }); - } - } - - let _ = name; - visitor.visit_newtype_struct(self) - } - - fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Bool(v) => visitor.visit_bool(v), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_string(visitor) - } - - fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_string(visitor) - } - - fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - #[cfg(any(feature = "std", feature = "alloc"))] - Value::String(v) => visitor.visit_string(v), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_byte_buf(visitor) - } - - fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - #[cfg(any(feature = "std", feature = "alloc"))] - Value::String(v) => visitor.visit_string(v), - Value::Array(v) => visit_array(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Null => visitor.visit_unit(), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_unit_struct<V>(self, _name: &'static str, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_unit(visitor) - } - - fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Array(v) => visit_array(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_seq(visitor) - } - - fn deserialize_tuple_struct<V>( - self, - _name: &'static str, - _len: usize, - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_seq(visitor) - } - - fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Object(v) => visit_object(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_struct<V>( - self, - _name: &'static str, - _fields: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Array(v) => visit_array(v, visitor), - Value::Object(v) => visit_object(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_string(visitor) - } - - fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - drop(self); - visitor.visit_unit() - } -} - -struct EnumDeserializer { - variant: String, - value: Option<Value>, -} - -impl<'de> EnumAccess<'de> for EnumDeserializer { - type Error = Error; - type Variant = VariantDeserializer; - - fn variant_seed<V>(self, seed: V) -> Result<(V::Value, VariantDeserializer), Error> - where - V: DeserializeSeed<'de>, - { - let variant = self.variant.into_deserializer(); - let visitor = VariantDeserializer { value: self.value }; - seed.deserialize(variant).map(|v| (v, visitor)) - } -} - -impl<'de> IntoDeserializer<'de, Error> for Value { - type Deserializer = Self; - - fn into_deserializer(self) -> Self::Deserializer { - self - } -} - -impl<'de> IntoDeserializer<'de, Error> for &'de Value { - type Deserializer = Self; - - fn into_deserializer(self) -> Self::Deserializer { - self - } -} - -struct VariantDeserializer { - value: Option<Value>, -} - -impl<'de> VariantAccess<'de> for VariantDeserializer { - type Error = Error; - - fn unit_variant(self) -> Result<(), Error> { - match self.value { - Some(value) => Deserialize::deserialize(value), - None => Ok(()), - } - } - - fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error> - where - T: DeserializeSeed<'de>, - { - match self.value { - Some(value) => seed.deserialize(value), - None => Err(serde::de::Error::invalid_type( - Unexpected::UnitVariant, - &"newtype variant", - )), - } - } - - fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self.value { - Some(Value::Array(v)) => { - if v.is_empty() { - visitor.visit_unit() - } else { - visit_array(v, visitor) - } - } - Some(other) => Err(serde::de::Error::invalid_type( - other.unexpected(), - &"tuple variant", - )), - None => Err(serde::de::Error::invalid_type( - Unexpected::UnitVariant, - &"tuple variant", - )), - } - } - - fn struct_variant<V>( - self, - _fields: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self.value { - Some(Value::Object(v)) => visit_object(v, visitor), - Some(other) => Err(serde::de::Error::invalid_type( - other.unexpected(), - &"struct variant", - )), - None => Err(serde::de::Error::invalid_type( - Unexpected::UnitVariant, - &"struct variant", - )), - } - } -} - -struct SeqDeserializer { - iter: vec::IntoIter<Value>, -} - -impl SeqDeserializer { - fn new(vec: Vec<Value>) -> Self { - SeqDeserializer { - iter: vec.into_iter(), - } - } -} - -impl<'de> SeqAccess<'de> for SeqDeserializer { - type Error = Error; - - fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> - where - T: DeserializeSeed<'de>, - { - match self.iter.next() { - Some(value) => seed.deserialize(value).map(Some), - None => Ok(None), - } - } - - fn size_hint(&self) -> Option<usize> { - match self.iter.size_hint() { - (lower, Some(upper)) if lower == upper => Some(upper), - _ => None, - } - } -} - -struct MapDeserializer { - iter: <Map<String, Value> as IntoIterator>::IntoIter, - value: Option<Value>, -} - -impl MapDeserializer { - fn new(map: Map<String, Value>) -> Self { - MapDeserializer { - iter: map.into_iter(), - value: None, - } - } -} - -impl<'de> MapAccess<'de> for MapDeserializer { - type Error = Error; - - fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> - where - T: DeserializeSeed<'de>, - { - match self.iter.next() { - Some((key, value)) => { - self.value = Some(value); - let key_de = MapKeyDeserializer { - key: Cow::Owned(key), - }; - seed.deserialize(key_de).map(Some) - } - None => Ok(None), - } - } - - fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Error> - where - T: DeserializeSeed<'de>, - { - match self.value.take() { - Some(value) => seed.deserialize(value), - None => Err(serde::de::Error::custom("value is missing")), - } - } - - fn size_hint(&self) -> Option<usize> { - match self.iter.size_hint() { - (lower, Some(upper)) if lower == upper => Some(upper), - _ => None, - } - } -} - -macro_rules! deserialize_value_ref_number { - ($method:ident) => { - #[cfg(not(feature = "arbitrary_precision"))] - fn $method<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Number(n) => n.deserialize_any(visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - #[cfg(feature = "arbitrary_precision")] - fn $method<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Number(n) => n.$method(visitor), - _ => self.deserialize_any(visitor), - } - } - }; -} - -fn visit_array_ref<'de, V>(array: &'de [Value], visitor: V) -> Result<V::Value, Error> -where - V: Visitor<'de>, -{ - let len = array.len(); - let mut deserializer = SeqRefDeserializer::new(array); - let seq = tri!(visitor.visit_seq(&mut deserializer)); - let remaining = deserializer.iter.len(); - if remaining == 0 { - Ok(seq) - } else { - Err(serde::de::Error::invalid_length( - len, - &"fewer elements in array", - )) - } -} - -fn visit_object_ref<'de, V>(object: &'de Map<String, Value>, visitor: V) -> Result<V::Value, Error> -where - V: Visitor<'de>, -{ - let len = object.len(); - let mut deserializer = MapRefDeserializer::new(object); - let map = tri!(visitor.visit_map(&mut deserializer)); - let remaining = deserializer.iter.len(); - if remaining == 0 { - Ok(map) - } else { - Err(serde::de::Error::invalid_length( - len, - &"fewer elements in map", - )) - } -} - -impl<'de> serde::Deserializer<'de> for &'de Value { - type Error = Error; - - fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Null => visitor.visit_unit(), - Value::Bool(v) => visitor.visit_bool(*v), - Value::Number(n) => n.deserialize_any(visitor), - Value::String(v) => visitor.visit_borrowed_str(v), - Value::Array(v) => visit_array_ref(v, visitor), - Value::Object(v) => visit_object_ref(v, visitor), - } - } - - deserialize_value_ref_number!(deserialize_i8); - deserialize_value_ref_number!(deserialize_i16); - deserialize_value_ref_number!(deserialize_i32); - deserialize_value_ref_number!(deserialize_i64); - deserialize_number!(deserialize_i128); - deserialize_value_ref_number!(deserialize_u8); - deserialize_value_ref_number!(deserialize_u16); - deserialize_value_ref_number!(deserialize_u32); - deserialize_value_ref_number!(deserialize_u64); - deserialize_number!(deserialize_u128); - deserialize_value_ref_number!(deserialize_f32); - deserialize_value_ref_number!(deserialize_f64); - - fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match *self { - Value::Null => visitor.visit_none(), - _ => visitor.visit_some(self), - } - } - - fn deserialize_enum<V>( - self, - _name: &str, - _variants: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - let (variant, value) = match self { - Value::Object(value) => { - let mut iter = value.into_iter(); - let (variant, value) = match iter.next() { - Some(v) => v, - None => { - return Err(serde::de::Error::invalid_value( - Unexpected::Map, - &"map with a single key", - )); - } - }; - // enums are encoded in json as maps with a single key:value pair - if iter.next().is_some() { - return Err(serde::de::Error::invalid_value( - Unexpected::Map, - &"map with a single key", - )); - } - (variant, Some(value)) - } - Value::String(variant) => (variant, None), - other => { - return Err(serde::de::Error::invalid_type( - other.unexpected(), - &"string or map", - )); - } - }; - - visitor.visit_enum(EnumRefDeserializer { variant, value }) - } - - #[inline] - fn deserialize_newtype_struct<V>( - self, - name: &'static str, - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - #[cfg(feature = "raw_value")] - { - if name == crate::raw::TOKEN { - return visitor.visit_map(crate::raw::OwnedRawDeserializer { - raw_value: Some(self.to_string()), - }); - } - } - - let _ = name; - visitor.visit_newtype_struct(self) - } - - fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match *self { - Value::Bool(v) => visitor.visit_bool(v), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_str(visitor) - } - - fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::String(v) => visitor.visit_borrowed_str(v), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_str(visitor) - } - - fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::String(v) => visitor.visit_borrowed_str(v), - Value::Array(v) => visit_array_ref(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_bytes(visitor) - } - - fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match *self { - Value::Null => visitor.visit_unit(), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_unit_struct<V>(self, _name: &'static str, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_unit(visitor) - } - - fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Array(v) => visit_array_ref(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_seq(visitor) - } - - fn deserialize_tuple_struct<V>( - self, - _name: &'static str, - _len: usize, - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_seq(visitor) - } - - fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Object(v) => visit_object_ref(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_struct<V>( - self, - _name: &'static str, - _fields: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self { - Value::Array(v) => visit_array_ref(v, visitor), - Value::Object(v) => visit_object_ref(v, visitor), - _ => Err(self.invalid_type(&visitor)), - } - } - - fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.deserialize_str(visitor) - } - - fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - visitor.visit_unit() - } -} - -struct EnumRefDeserializer<'de> { - variant: &'de str, - value: Option<&'de Value>, -} - -impl<'de> EnumAccess<'de> for EnumRefDeserializer<'de> { - type Error = Error; - type Variant = VariantRefDeserializer<'de>; - - fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Error> - where - V: DeserializeSeed<'de>, - { - let variant = self.variant.into_deserializer(); - let visitor = VariantRefDeserializer { value: self.value }; - seed.deserialize(variant).map(|v| (v, visitor)) - } -} - -struct VariantRefDeserializer<'de> { - value: Option<&'de Value>, -} - -impl<'de> VariantAccess<'de> for VariantRefDeserializer<'de> { - type Error = Error; - - fn unit_variant(self) -> Result<(), Error> { - match self.value { - Some(value) => Deserialize::deserialize(value), - None => Ok(()), - } - } - - fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error> - where - T: DeserializeSeed<'de>, - { - match self.value { - Some(value) => seed.deserialize(value), - None => Err(serde::de::Error::invalid_type( - Unexpected::UnitVariant, - &"newtype variant", - )), - } - } - - fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self.value { - Some(Value::Array(v)) => { - if v.is_empty() { - visitor.visit_unit() - } else { - visit_array_ref(v, visitor) - } - } - Some(other) => Err(serde::de::Error::invalid_type( - other.unexpected(), - &"tuple variant", - )), - None => Err(serde::de::Error::invalid_type( - Unexpected::UnitVariant, - &"tuple variant", - )), - } - } - - fn struct_variant<V>( - self, - _fields: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - match self.value { - Some(Value::Object(v)) => visit_object_ref(v, visitor), - Some(other) => Err(serde::de::Error::invalid_type( - other.unexpected(), - &"struct variant", - )), - None => Err(serde::de::Error::invalid_type( - Unexpected::UnitVariant, - &"struct variant", - )), - } - } -} - -struct SeqRefDeserializer<'de> { - iter: slice::Iter<'de, Value>, -} - -impl<'de> SeqRefDeserializer<'de> { - fn new(slice: &'de [Value]) -> Self { - SeqRefDeserializer { iter: slice.iter() } - } -} - -impl<'de> SeqAccess<'de> for SeqRefDeserializer<'de> { - type Error = Error; - - fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> - where - T: DeserializeSeed<'de>, - { - match self.iter.next() { - Some(value) => seed.deserialize(value).map(Some), - None => Ok(None), - } - } - - fn size_hint(&self) -> Option<usize> { - match self.iter.size_hint() { - (lower, Some(upper)) if lower == upper => Some(upper), - _ => None, - } - } -} - -struct MapRefDeserializer<'de> { - iter: <&'de Map<String, Value> as IntoIterator>::IntoIter, - value: Option<&'de Value>, -} - -impl<'de> MapRefDeserializer<'de> { - fn new(map: &'de Map<String, Value>) -> Self { - MapRefDeserializer { - iter: map.into_iter(), - value: None, - } - } -} - -impl<'de> MapAccess<'de> for MapRefDeserializer<'de> { - type Error = Error; - - fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> - where - T: DeserializeSeed<'de>, - { - match self.iter.next() { - Some((key, value)) => { - self.value = Some(value); - let key_de = MapKeyDeserializer { - key: Cow::Borrowed(&**key), - }; - seed.deserialize(key_de).map(Some) - } - None => Ok(None), - } - } - - fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Error> - where - T: DeserializeSeed<'de>, - { - match self.value.take() { - Some(value) => seed.deserialize(value), - None => Err(serde::de::Error::custom("value is missing")), - } - } - - fn size_hint(&self) -> Option<usize> { - match self.iter.size_hint() { - (lower, Some(upper)) if lower == upper => Some(upper), - _ => None, - } - } -} - -struct MapKeyDeserializer<'de> { - key: Cow<'de, str>, -} - -macro_rules! deserialize_numeric_key { - ($method:ident) => { - deserialize_numeric_key!($method, deserialize_number); - }; - - ($method:ident, $using:ident) => { - fn $method<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - let mut de = crate::Deserializer::from_str(&self.key); - - match tri!(de.peek()) { - Some(b'0'..=b'9' | b'-') => {} - _ => return Err(Error::syntax(ErrorCode::ExpectedNumericKey, 0, 0)), - } - - let number = tri!(de.$using(visitor)); - - if tri!(de.peek()).is_some() { - return Err(Error::syntax(ErrorCode::ExpectedNumericKey, 0, 0)); - } - - Ok(number) - } - }; -} - -impl<'de> serde::Deserializer<'de> for MapKeyDeserializer<'de> { - type Error = Error; - - fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - BorrowedCowStrDeserializer::new(self.key).deserialize_any(visitor) - } - - deserialize_numeric_key!(deserialize_i8); - deserialize_numeric_key!(deserialize_i16); - deserialize_numeric_key!(deserialize_i32); - deserialize_numeric_key!(deserialize_i64); - deserialize_numeric_key!(deserialize_u8); - deserialize_numeric_key!(deserialize_u16); - deserialize_numeric_key!(deserialize_u32); - deserialize_numeric_key!(deserialize_u64); - #[cfg(not(feature = "float_roundtrip"))] - deserialize_numeric_key!(deserialize_f32); - deserialize_numeric_key!(deserialize_f64); - - #[cfg(feature = "float_roundtrip")] - deserialize_numeric_key!(deserialize_f32, do_deserialize_f32); - deserialize_numeric_key!(deserialize_i128, do_deserialize_i128); - deserialize_numeric_key!(deserialize_u128, do_deserialize_u128); - - fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - if self.key == "true" { - visitor.visit_bool(true) - } else if self.key == "false" { - visitor.visit_bool(false) - } else { - Err(serde::de::Error::invalid_type( - Unexpected::Str(&self.key), - &visitor, - )) - } - } - - #[inline] - fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - // Map keys cannot be null. - visitor.visit_some(self) - } - - #[inline] - fn deserialize_newtype_struct<V>( - self, - _name: &'static str, - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - visitor.visit_newtype_struct(self) - } - - fn deserialize_enum<V>( - self, - name: &'static str, - variants: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: Visitor<'de>, - { - self.key - .into_deserializer() - .deserialize_enum(name, variants, visitor) - } - - forward_to_deserialize_any! { - char str string bytes byte_buf unit unit_struct seq tuple tuple_struct - map struct identifier ignored_any - } -} - -struct KeyClassifier; - -enum KeyClass { - Map(String), - #[cfg(feature = "arbitrary_precision")] - Number, - #[cfg(feature = "raw_value")] - RawValue, -} - -impl<'de> DeserializeSeed<'de> for KeyClassifier { - type Value = KeyClass; - - fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> - where - D: serde::Deserializer<'de>, - { - deserializer.deserialize_str(self) - } -} - -impl<'de> Visitor<'de> for KeyClassifier { - type Value = KeyClass; - - fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - formatter.write_str("a string key") - } - - fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> - where - E: de::Error, - { - match s { - #[cfg(feature = "arbitrary_precision")] - crate::number::TOKEN => Ok(KeyClass::Number), - #[cfg(feature = "raw_value")] - crate::raw::TOKEN => Ok(KeyClass::RawValue), - _ => Ok(KeyClass::Map(s.to_owned())), - } - } - - #[cfg(any(feature = "std", feature = "alloc"))] - fn visit_string<E>(self, s: String) -> Result<Self::Value, E> - where - E: de::Error, - { - match s.as_str() { - #[cfg(feature = "arbitrary_precision")] - crate::number::TOKEN => Ok(KeyClass::Number), - #[cfg(feature = "raw_value")] - crate::raw::TOKEN => Ok(KeyClass::RawValue), - _ => Ok(KeyClass::Map(s)), - } - } -} - -impl Value { - #[cold] - fn invalid_type<E>(&self, exp: &dyn Expected) -> E - where - E: serde::de::Error, - { - serde::de::Error::invalid_type(self.unexpected(), exp) - } - - #[cold] - fn unexpected(&self) -> Unexpected { - match self { - Value::Null => Unexpected::Unit, - Value::Bool(b) => Unexpected::Bool(*b), - Value::Number(n) => n.unexpected(), - Value::String(s) => Unexpected::Str(s), - Value::Array(_) => Unexpected::Seq, - Value::Object(_) => Unexpected::Map, - } - } -} - -struct BorrowedCowStrDeserializer<'de> { - value: Cow<'de, str>, -} - -impl<'de> BorrowedCowStrDeserializer<'de> { - fn new(value: Cow<'de, str>) -> Self { - BorrowedCowStrDeserializer { value } - } -} - -impl<'de> de::Deserializer<'de> for BorrowedCowStrDeserializer<'de> { - type Error = Error; - - fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> - where - V: de::Visitor<'de>, - { - match self.value { - Cow::Borrowed(string) => visitor.visit_borrowed_str(string), - #[cfg(any(feature = "std", feature = "alloc"))] - Cow::Owned(string) => visitor.visit_string(string), - } - } - - fn deserialize_enum<V>( - self, - _name: &str, - _variants: &'static [&'static str], - visitor: V, - ) -> Result<V::Value, Error> - where - V: de::Visitor<'de>, - { - visitor.visit_enum(self) - } - - forward_to_deserialize_any! { - bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string - bytes byte_buf option unit unit_struct newtype_struct seq tuple - tuple_struct map struct identifier ignored_any - } -} - -impl<'de> de::EnumAccess<'de> for BorrowedCowStrDeserializer<'de> { - type Error = Error; - type Variant = UnitOnly; - - fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Error> - where - T: de::DeserializeSeed<'de>, - { - let value = tri!(seed.deserialize(self)); - Ok((value, UnitOnly)) - } -} - -struct UnitOnly; - -impl<'de> de::VariantAccess<'de> for UnitOnly { - type Error = Error; - - fn unit_variant(self) -> Result<(), Error> { - Ok(()) - } - - fn newtype_variant_seed<T>(self, _seed: T) -> Result<T::Value, Error> - where - T: de::DeserializeSeed<'de>, - { - Err(de::Error::invalid_type( - Unexpected::UnitVariant, - &"newtype variant", - )) - } - - fn tuple_variant<V>(self, _len: usize, _visitor: V) -> Result<V::Value, Error> - where - V: de::Visitor<'de>, - { - Err(de::Error::invalid_type( - Unexpected::UnitVariant, - &"tuple variant", - )) - } - - fn struct_variant<V>( - self, - _fields: &'static [&'static str], - _visitor: V, - ) -> Result<V::Value, Error> - where - V: de::Visitor<'de>, - { - Err(de::Error::invalid_type( - Unexpected::UnitVariant, - &"struct variant", - )) - } -} |