Struct serde_tagged::de::external::Visitor

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

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§

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

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pub fn new(seed_factory: F, tag_seed: S) -> Self

Creates a new visitor with the given SeedFactory.

Trait Implementations§

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

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

The value produced by this visitor.
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fn expecting(&self, fmtr: &mut Formatter<'_>) -> Result

Format a message stating what data this Visitor expects to receive. Read more
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fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
where A: MapAccess<'de>,

The input contains a key-value map. Read more
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fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E>
where E: Error,

The input contains a boolean. Read more
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fn visit_i8<E>(self, v: i8) -> Result<Self::Value, E>
where E: Error,

The input contains an i8. Read more
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fn visit_i16<E>(self, v: i16) -> Result<Self::Value, E>
where E: Error,

The input contains an i16. Read more
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fn visit_i32<E>(self, v: i32) -> Result<Self::Value, E>
where E: Error,

The input contains an i32. Read more
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fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E>
where E: Error,

The input contains an i64. Read more
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fn visit_i128<E>(self, v: i128) -> Result<Self::Value, E>
where E: Error,

The input contains a i128. Read more
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fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>
where E: Error,

The input contains a u8. Read more
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fn visit_u16<E>(self, v: u16) -> Result<Self::Value, E>
where E: Error,

The input contains a u16. Read more
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fn visit_u32<E>(self, v: u32) -> Result<Self::Value, E>
where E: Error,

The input contains a u32. Read more
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fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
where E: Error,

The input contains a u64. Read more
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fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E>
where E: Error,

The input contains a u128. Read more
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fn visit_f32<E>(self, v: f32) -> Result<Self::Value, E>
where E: Error,

The input contains an f32. Read more
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fn visit_f64<E>(self, v: f64) -> Result<Self::Value, E>
where E: Error,

The input contains an f64. Read more
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fn visit_char<E>(self, v: char) -> Result<Self::Value, E>
where E: Error,

The input contains a char. Read more
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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. Read more
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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. Read more
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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. Read more
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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. Read more
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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. Read more
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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. Read more
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fn visit_none<E>(self) -> Result<Self::Value, E>
where E: Error,

The input contains an optional that is absent. Read more
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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. Read more
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fn visit_unit<E>(self) -> Result<Self::Value, E>
where E: Error,

The input contains a unit (). Read more
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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. Read more
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fn visit_seq<A>( self, seq: A, ) -> Result<Self::Value, <A as SeqAccess<'de>>::Error>
where A: SeqAccess<'de>,

The input contains a sequence of elements. Read more
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fn visit_enum<A>( self, data: A, ) -> Result<Self::Value, <A as EnumAccess<'de>>::Error>
where A: EnumAccess<'de>,

The input contains an enum. Read more

Auto Trait Implementations§

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impl<F, S> Freeze for Visitor<F, S>
where F: Freeze, S: Freeze,

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impl<F, S> RefUnwindSafe for Visitor<F, S>

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impl<F, S> Send for Visitor<F, S>
where F: Send, S: Send,

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impl<F, S> Sync for Visitor<F, S>
where F: Sync, S: Sync,

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impl<F, S> Unpin for Visitor<F, S>
where F: Unpin, S: Unpin,

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impl<F, S> UnwindSafe for Visitor<F, S>
where F: UnwindSafe, S: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<'de, T> Expected for T
where T: Visitor<'de>,

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

Format an explanation of what data was being expected. Same signature as the Display and Debug traits.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.