neco-json5

日本語

zero dependency JSON5 subset parser.

Features

• Object parsing with unquoted, single-quoted, or double-quoted keys
• Scalar parsing for null, bool, number, and string values
• Array parsing with comma-separated scalar values
• Object fields stored in source order as Vec<(String, Json5Value)>
• ParseError with byte-oriented position and message

Usage

Parse

use neco_json5::{parse, Json5Value};

let value = parse("{name: 'neco'}").unwrap();
assert!(matches!(value, Json5Value::Map(_)));

Read fields

use neco_json5::{parse, Json5Value};

let value = parse("{name: 'neco'}").unwrap();
let Json5Value::Map(fields) = value else { panic!("map") };
assert!(fields.iter().any(|(key, value)| {
    key == "name" && matches!(value, Json5Value::String(text) if text == "neco")
}));

API

Format support

The supported subset covers configuration-shaped JSON5 object documents, common scalar values, and scalar arrays. It keeps duplicate object keys in order and does not implement the full JSON5 grammar.

License

MIT