Trait serde::ser::SerializeStruct

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

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

§Example use

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

struct Rgb {
    r: u8,
    g: u8,
    b: u8,
}

impl Serialize for Rgb {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        let mut rgb = serializer.serialize_struct("Rgb", 3)?;
        rgb.serialize_field("r", &self.r)?;
        rgb.serialize_field("g", &self.g)?;
        rgb.serialize_field("b", &self.b)?;
        rgb.end()
    }
}

§Example implementation

The example data format presented on the website demonstrates an implementation of SerializeStruct 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>( &mut self, key: &'static str, value: &T, ) -> Result<(), Self::Error>
where T: Serialize + ?Sized,

Serialize a struct field.

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

Finish serializing a struct.

Provided Methods§

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fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>

Indicate that a struct field has been skipped.

Object Safety§

This trait is not object safe.

Implementors§

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impl<Ok, Error> SerializeStruct for Impossible<Ok, Error>
where Error: Error,

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type Ok = Ok

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type Error = Error