[−][src]Trait serde::de::VariantVisitor

pub trait VariantVisitor {
    type Error: Error;
    fn visit_variant<V>(&mut self) -> Result<V, Self::Error>
    where
        V: Deserialize;

    fn visit_newtype<T>(&mut self) -> Result<T, Self::Error>
    where
        T: Deserialize;

    fn visit_tuple<V>(
        &mut self, 
        len: usize, 
        visitor: V
    ) -> Result<V::Value, Self::Error>
    where
        V: Visitor;

    fn visit_struct<V>(
        &mut self, 
        fields: &'static [&'static str], 
        visitor: V
    ) -> Result<V::Value, Self::Error>
    where
        V: Visitor;

    fn visit_unit(&mut self) -> Result<(), Self::Error> { ... }
}

VariantVisitor is a visitor that is created by the Deserializer and passed to the Deserialize in order to deserialize a specific enum variant.

Associated Types

The error type that can be returned if some error occurs during deserialization.

Required Methods

visit_variant is called to identify which variant to deserialize.

visit_newtype is called when deserializing a variant with a single value. A good default is often to use the visit_tuple method to deserialize a (value,).

visit_tuple is called when deserializing a tuple-like variant. If no tuple variants are expected, yield a Err(serde::de::Error::invalid_type(serde::de::Type::TupleVariant))

visit_struct is called when deserializing a struct-like variant. If no struct variants are expected, yield a Err(serde::de::Error::invalid_type(serde::de::Type::StructVariant))

Provided Methods

visit_unit is called when deserializing a variant with no values.

Implementations on Foreign Types

impl<'a, T> VariantVisitor for &'a mut T where
    T: VariantVisitor, 
[src]

Implementors

impl<'a, E> VariantVisitor for CowStrDeserializer<'a, E> where
    E: Error, 
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impl<'a, E> VariantVisitor for StrDeserializer<'a, E> where
    E: Error, 
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impl<'a, E> VariantVisitor for StringDeserializer<E> where
    E: Error, 
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