neco-yml

日本語

zero dependency YAML subset parser.

Features

• Line-oriented key: value parsing
• Empty values followed by - item lines converted to lists
• Scalar parsing for null, bool, number, and string values
• Field order preserved as Vec<(String, YmlValue)>
• ParseError with line-oriented position and message

Usage

Parse

use neco_yml::{parse, YmlValue};

let value = parse("name: neco").unwrap();
assert!(matches!(value, YmlValue::Map(_)));

Read fields

use neco_yml::{parse, YmlValue};

let value = parse("name: neco").unwrap();
let YmlValue::Map(fields) = value else { panic!("map") };
assert!(fields.iter().any(|(key, value)| {
    key == "name" && matches!(value, YmlValue::String(text) if text == "neco")
}));

API

Format support

The supported subset covers flat configuration-shaped YAML with scalar values and simple lists. It preserves duplicate keys in source order and does not implement anchors, tags, merge keys, or full YAML document streams.

License

MIT