Struct serde_tagged::de::internal::Visitor

pub struct Visitor<F, S> { /* private fields */ }

A visitor that can be used to deserialize an externally tagged value.

This visitor handles an externally tagged value, which is represented by a map containing a single entry, where the key is the tag and the value is the value that should be deserialized. Thus it will return an error if the visited type is not a map.

The SeedFactory provided to this visitor provides a serde::de::DeserializeSeed implementation depending on the tag, which then determines how the value is going to be deserialized.

See de for more information on SeedFactory and implementations thereof.

Implementations

impl<F, S> Visitor<F, S>

pub fn new(tag_key: &'static str, seed_factory: F, tag_seed: S) -> Self

Creates a new visitor with the given tag-key and SeedFactory.

Trait Implementations

impl<'de, F, S> Visitor<'de> for Visitor<F, S>

where F: SeedFactory<'de, S::Value>, S: DeserializeSeed<'de>,

type Value = <F as SeedFactory<'de, <S as DeserializeSeed<'de>>::Value>>::Value

The value produced by this visitor.

fn expecting(&self, fmt: &mut Formatter<'_>) -> Result

Format a message stating what data this Visitor expects to receive.

fn visit_seq<A>(self, seq: A) -> Result<Self::Value, A::Error>

where A: SeqAccess<'de>,

The input contains a sequence of elements.

fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>

where A: MapAccess<'de>,

The input contains a key-value map.

fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E>

where E: Error,

The input contains a boolean.

fn visit_i8<E>(self, v: i8) -> Result<Self::Value, E>

where E: Error,

The input contains an i8.

fn visit_i16<E>(self, v: i16) -> Result<Self::Value, E>

where E: Error,

The input contains an i16.

fn visit_i32<E>(self, v: i32) -> Result<Self::Value, E>

where E: Error,

The input contains an i32.

fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E>

where E: Error,

The input contains an i64.

fn visit_i128<E>(self, v: i128) -> Result<Self::Value, E>

where E: Error,

The input contains a i128.

fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>

where E: Error,

The input contains a u8.

fn visit_u16<E>(self, v: u16) -> Result<Self::Value, E>

where E: Error,

The input contains a u16.

fn visit_u32<E>(self, v: u32) -> Result<Self::Value, E>

where E: Error,

The input contains a u32.

fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>

where E: Error,

The input contains a u64.

fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E>

where E: Error,

The input contains a u128.

fn visit_f32<E>(self, v: f32) -> Result<Self::Value, E>

where E: Error,

The input contains an f32.

fn visit_f64<E>(self, v: f64) -> Result<Self::Value, E>

where E: Error,

The input contains an f64.

fn visit_char<E>(self, v: char) -> Result<Self::Value, E>

where E: Error,

The input contains a char.

fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>

where E: Error,

The input contains a string. The lifetime of the string is ephemeral and it may be destroyed after this method returns.

fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Self::Value, E>

where E: Error,

The input contains a string that lives at least as long as the Deserializer.

fn visit_string<E>(self, v: String) -> Result<Self::Value, E>

where E: Error,

The input contains a string and ownership of the string is being given to the Visitor.

fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>

where E: Error,

The input contains a byte array. The lifetime of the byte array is ephemeral and it may be destroyed after this method returns.

fn visit_borrowed_bytes<E>(self, v: &'de [u8]) -> Result<Self::Value, E>

where E: Error,

The input contains a byte array that lives at least as long as the Deserializer.

fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E>

where E: Error,

The input contains a byte array and ownership of the byte array is being given to the Visitor.

fn visit_none<E>(self) -> Result<Self::Value, E>

where E: Error,

The input contains an optional that is absent.

fn visit_some<D>( self, deserializer: D, ) -> Result<Self::Value, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

The input contains an optional that is present.

fn visit_unit<E>(self) -> Result<Self::Value, E>

where E: Error,

The input contains a unit ().

fn visit_newtype_struct<D>( self, deserializer: D, ) -> Result<Self::Value, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

The input contains a newtype struct.

fn visit_enum<A>( self, data: A, ) -> Result<Self::Value, <A as EnumAccess<'de>>::Error>

where A: EnumAccess<'de>,

The input contains an enum.