nom_edn

A nom parser for edn

Warning: this is alpha-quality software. There isn't a real public API right now, and test coverage/quality need to improve. That said, it is probably complete enough that you could build a Lisp interpreter with it.

Here's a test as an example:

#[test]
fn map_nested_values() {
    let map_str = "{:a [1 2 4.01]}";
    let map_res = edn_map(map_str);
    assert_eq!(
        map_res,
        Ok((
            "",
            Map(hashmap!(
                Keyword("a".to_string()),
                Vector(vec!(Integer(1), Integer(2), Float(4.01.into())))
            ))
        ))
    );
}

If your data could be any edn form, use edn_any. The above test is a unit test specifically for exercising map parsing, while edn_any will try to parse all valid edn (at least, all valid edn that is built so far).

What's built so far:

• nil
• booleans
• strings
• chars
• symbols
• keywords
• integers
• floats
• lists
• vectors
• maps
• sets
• comments (;)
• discard (#_)
• builtin tagged elements (inst, uuid, etc)
• user-defined tagged elements
• commas as whitespace
• better tests around namespaced keywords/symbols
• real-world tests of a few real (large) source files
• Investigate/port some of Clojure's reader tests: https://github.com/clojure/clojure/blob/master/test/clojure/test_clojure/reader.cljc
• get rid of as many .unwrap()s as possible
• optional hashbrown for hashmaps/hashsets instead of stdlib
• benchmarking for fun