# Trait serde::ser::SerializeTupleVariant

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    pub trait SerializeTupleVariant {
        type Ok;
        type Error: Error;

        fn serialize_field<T: ?Sized>(
            &mut self,
            value: &T
        ) -> Result<(), Self::Error>
        where
            T: Serialize;
        fn end(self) -> Result<Self::Ok, Self::Error>;
    }

Expand description

Returned from `Serializer::serialize_tuple_variant`.

## Example use

ⓘ

    use serde::ser::{Serialize, SerializeTupleVariant, Serializer};

    enum E {
        T(u8, u8),
        U(String, u32, u32),
    }

    impl Serialize for E {
        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
        where
            S: Serializer,
        {
            match *self {
                E::T(ref a, ref b) => {
                    let mut tv = serializer.serialize_tuple_variant("E", 0, "T", 2)?;
                    tv.serialize_field(a)?;
                    tv.serialize_field(b)?;
                    tv.end()
                }
                E::U(ref a, ref b, ref c) => {
                    let mut tv = serializer.serialize_tuple_variant("E", 1, "U", 3)?;
                    tv.serialize_field(a)?;
                    tv.serialize_field(b)?;
                    tv.serialize_field(c)?;
                    tv.end()
                }
            }
        }
    }

## Example implementation

The example data format presented on the website demonstrates an implementation of `SerializeTupleVariant` for a basic JSON data format.

## Required Associated Types

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#### type Ok

Must match the `Ok` type of our `Serializer`.

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#### type Error: Error

Must match the `Error` type of our `Serializer`.

## Required Methods

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#### fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> where
T: Serialize,

Serialize a tuple variant field.

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#### fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a tuple variant.

## Implementors

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### impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error> where
Error: Error,

#### type Ok = Ok

#### type Error = Error