# Trait serde::ser::SerializeTupleVariant [−] [src]

    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>;
    }

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.

## Associated Types

### `type Ok` [src]

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

### `type Error: Error` [src]

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

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## Required methods

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

Serialize a tuple variant field.

### `fn end(self) -> Result<Self::Ok, Self::Error>` [src]

Finish serializing a tuple variant.

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## Implementors

### `impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error> where
Error: Error,` [src]

#### `type Ok = Ok`

#### `type Error = Error`

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

#### `fn end(self) -> Result<Ok, Error>` [src]

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