Trait serde::ser::SerializeStructVariant

source ·

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

    // Required methods
    fn serialize_field<T>(
        &mut self,
        key: &'static str,
        value: &T
    ) -> Result<(), Self::Error>
       where T: ?Sized + Serialize;
    fn end(self) -> Result<Self::Ok, Self::Error>;

    // Provided method
    fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error> { ... }
}

Expand description

Returned from Serializer::serialize_struct_variant.

§Example use

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

enum E {
    S { r: u8, g: u8, b: u8 },
}

impl Serialize for E {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        match *self {
            E::S {
                ref r,
                ref g,
                ref b,
            } => {
                let mut sv = serializer.serialize_struct_variant("E", 0, "S", 3)?;
                sv.serialize_field("r", r)?;
                sv.serialize_field("g", g)?;
                sv.serialize_field("b", b)?;
                sv.end()
            }
        }
    }
}