Revision control
Copy as Markdown
Other Tools
// Copyright 2015, Yuheng Chen. See the LICENSE file at the top-level
// directory of this distribution.
//! YAML 1.2 implementation in pure Rust.
//!
//! # Usage
//!
//! used by adding `yaml-rust` to the dependencies in your project's `Cargo.toml`.
//!
//! ```toml
//! [dependencies.yaml-rust]
//! ```
//!
//! And this in your crate root:
//!
//! ```rust
//! extern crate yaml_rust;
//! ```
//!
//! Parse a string into `Vec<Yaml>` and then serialize it as a YAML string.
//!
//! # Examples
//!
//! ```
//! use yaml_rust::{YamlLoader, YamlEmitter};
//!
//! let docs = YamlLoader::load_from_str("[1, 2, 3]").unwrap();
//! let doc = &docs[0]; // select the first document
//! assert_eq!(doc[0].as_i64().unwrap(), 1); // access elements by index
//!
//! let mut out_str = String::new();
//! let mut emitter = YamlEmitter::new(&mut out_str);
//! emitter.dump(doc).unwrap(); // dump the YAML object to a String
//!
//! ```
#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
#![cfg_attr(feature = "cargo-clippy", warn(cyclomatic_complexity))]
#![cfg_attr(
feature = "cargo-clippy",
allow(match_same_arms, should_implement_trait)
)]
extern crate linked_hash_map;
pub mod emitter;
pub mod parser;
pub mod scanner;
pub mod yaml;
// reexport key APIs
pub use crate::emitter::{EmitError, YamlEmitter};
pub use crate::parser::Event;
pub use crate::scanner::ScanError;
pub use crate::yaml::{Yaml, YamlLoader};
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_api() {
let s = "
# from yaml-cpp example
- name: Ogre
position: [0, 5, 0]
powers:
- name: Club
damage: 10
- name: Fist
damage: 8
- name: Dragon
position: [1, 0, 10]
powers:
- name: Fire Breath
damage: 25
- name: Claws
damage: 15
- name: Wizard
position: [5, -3, 0]
powers:
- name: Acid Rain
damage: 50
- name: Staff
damage: 3
";
let docs = YamlLoader::load_from_str(s).unwrap();
let doc = &docs[0];
assert_eq!(doc[0]["name"].as_str().unwrap(), "Ogre");
let mut writer = String::new();
{
let mut emitter = YamlEmitter::new(&mut writer);
emitter.dump(doc).unwrap();
}
assert!(!writer.is_empty());
}
fn try_fail(s: &str) -> Result<Vec<Yaml>, ScanError> {
let t = YamlLoader::load_from_str(s)?;
Ok(t)
}
#[test]
fn test_fail() {
let s = "
# syntax error
scalar
key: [1, 2]]
key1:a2
";
assert!(YamlLoader::load_from_str(s).is_err());
assert!(try_fail(s).is_err());
}
}