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

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.

Implementors