Trait serde::de::EnumVisitor

pub trait EnumVisitor: Sized {
    type Error: Error;
    type Variant: VariantVisitor<Error = Self::Error>;
    fn visit_variant_seed<V>(
        self, 
        seed: V
    ) -> Result<(V::Value, Self::Variant), Self::Error>
    where
        V: DeserializeSeed;

    fn visit_variant<V>(self) -> Result<(V, Self::Variant), Self::Error>
    where
        V: Deserialize,
    { ... }
}

EnumVisitor is a visitor that is created by the Deserializer and passed to the Deserialize in order to identify which variant of an enum to deserialize.

Associated Types

type Error: Error

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

type Variant: VariantVisitor<Error = Self::Error>

The Visitor that will be used to deserialize the content of the enum variant.

Required Methods

fn visit_variant_seed<V>(
    self,
    seed: V
) -> Result<(V::Value, Self::Variant), Self::Error> where
    V: DeserializeSeed, 

visit_variant is called to identify which variant to deserialize.

Deserialize implementations should typically use EnumVisitor::visit_variant instead.

Provided Methods

fn visit_variant<V>(self) -> Result<(V, Self::Variant), Self::Error> where
    V: Deserialize, 

visit_variant is called to identify which variant to deserialize.

This method exists as a convenience for Deserialize implementations. EnumVisitor implementations should not override the default behavior.

Implementors

• impl<E> EnumVisitor for U32Deserializer<E> where
    E: Error,  type Error = E; type Variant = UnitOnly<E>;
• impl<'a, E> EnumVisitor for StrDeserializer<'a, E> where
    E: Error,  type Error = E; type Variant = UnitOnly<E>;
• impl<'a, E> EnumVisitor for StringDeserializer<E> where
    E: Error,  type Error = E; type Variant = UnitOnly<E>;
• impl<'a, E> EnumVisitor for CowStrDeserializer<'a, E> where
    E: Error,  type Error = E; type Variant = UnitOnly<E>;