Crate serde_yaml[][src]

Expand description


This crate is a Rust library for using the Serde serialization framework with data in YAML file format.

This library does not reimplement a YAML parser; it uses yaml-rust which is a pure Rust YAML 1.2 implementation.


use std::collections::BTreeMap;

fn main() -> Result<(), serde_yaml::Error> {
    // You have some type.
    let mut map = BTreeMap::new();
    map.insert("x".to_string(), 1.0);
    map.insert("y".to_string(), 2.0);

    // Serialize it to a YAML string.
    let s = serde_yaml::to_string(&map)?;
    assert_eq!(s, "---\nx: 1.0\ny: 2.0\n");

    // Deserialize it back to a Rust type.
    let deserialized_map: BTreeMap<String, f64> = serde_yaml::from_str(&s)?;
    assert_eq!(map, deserialized_map);

Using Serde derive

It can also be used with Serde’s serialization code generator serde_derive to handle structs and enums defined in your own program.

use serde::{Serialize, Deserialize};

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct Point {
    x: f64,
    y: f64,

fn main() -> Result<(), serde_yaml::Error> {
    let point = Point { x: 1.0, y: 2.0 };

    let s = serde_yaml::to_string(&point)?;
    assert_eq!(s, "---\nx: 1.0\ny: 2.0\n");

    let deserialized_point: Point = serde_yaml::from_str(&s)?;
    assert_eq!(point, deserialized_point);


A YAML mapping and its iterator types.

Entry points for deserializing with pre-existing state.


A structure that deserializes YAML into Rust values.

An error that happened serializing or deserializing YAML data.

The input location that an error occured.

A YAML mapping in which the keys and values are both serde_yaml::Value.

Represents a YAML number, whether integer or floating point.

A structure for serializing Rust values into YAML.


Represents any valid YAML value.


A type that can be used to index into a serde_yaml::Value. See the get and get_mut methods of Value.


Deserialize an instance of type T from an IO stream of YAML.

Deserialize an instance of type T from bytes of YAML text.

Deserialize an instance of type T from a string of YAML text.

Interpret a serde_yaml::Value as an instance of type T.

Serialize the given data structure as a String of YAML.

Convert a T into serde_yaml::Value which is an enum that can represent any valid YAML data.

Serialize the given data structure as a YAML byte vector.

Serialize the given data structure as YAML into the IO stream.

Type Definitions

Alias for a Result with the error type serde_yaml::Error.

A YAML sequence in which the elements are serde_yaml::Value.