Crate d4t4

D4t4

WIP - work in progress, use at your own risk

A JSON superset

Features

• JSON-compatible
• Objects & arrays may have trailing comma
• Object keys may not need quotes
• Single & multiline comments are allowed
• Strings may use double and/or single quotes
• Values can be referenced from other parts of the object tree

Example

    use d4t4::parse;

    fn main() {
        let data = r#"{
           /*
               Look how nice, we can separate re-useable data!
           */
           padding: {
               s: '1px',
               m: '2px',
               l: '3px', // note: triling comma
           },
           color: {
               red: '#fed7d7',
               green: '#c6f6d5',
               blue: '#bee3f8', # note: found another one!
           },
           objects: [
               {
                   border: "1px solid &{color.red}",
                   padding: "&{padding.s}",
               },
               {
                   border: "1px solid &{color.green}",
                   padding: "&{padding.m}",
               },
               {
                   border: "1px solid &{color.blue}",
                   padding: "&{padding.l}",
               },
           ]
        }"#;

        let json = parse(data).ok().unwrap();
        assert_eq!(json["objects"][0]["padding"], "1px");
        assert_eq!(json["objects"][1]["padding"], "2px");
        assert_eq!(json["objects"][2]["padding"], "3px");
    }

Parse json:

    use d4t4::parse;

    fn main() {
        let json = r#"{
            "number": 100,
            "null": null,
            "true": true,
            "object": {},
            "array": [1,2,3],
            "unicode": "\u1234",
            "string": "check out the tests directory if you want to see more",
        }"#;

        assert!(parse(json).is_ok());
    }

Contributions

I would love to get some feedback if you find my little project useful. Please feel free to highlight issues with my code or submit a PR in case you want to improve it. Note that the goal so far hasn't been performance, rather on functionality and api.

Enums

Error
Value	Represents any valid JSON value.

Functions

parse

Type Definitions

Result

Result<T, Error>