edn-rs

[Experimental] Crate to parse and emit EDN

• This lib does not make effort to conform the EDN received to EDN Spec. The lib that generated this EDN should be responsible for this.

Usage

Cargo.toml

[dependencies]
edn-rs = "0.4.4"

Parse an EDN into a Edn with edn! macro:

#[macro_use]
extern crate edn_rs;

fn main() {
    let edn = edn!((sym 1.2 3 false :f nil 3/4));
    let expected = Edn::List(
            List::new(
                vec![
                    Edn::Symbol("sym".to_string()),
                    Edn::Double(1.2),
                    Edn::Int(3),
                    Edn::Bool(false),
                    Edn::Key("f".to_string()),
                    Edn::Nil,
                    Edn::Rational("3/4".to_string())
                ]
            )
        );

        assert_eq!(edn, expected);
}

To navigate through Edn data you can just use get and get_mut:

let edn = edn!([ 1 1.2 3 {false :f nil 3/4}]);

assert_eq!(edn[1], edn!(1.2));
assert_eq!(edn[1], Edn::Double(1.2f64));
assert_eq!(edn[3]["false"], edn!(:f));
assert_eq!(edn[3]["false"], Edn::Key("f".to_string()));

Emits EDN format from a Json file

use edn_rs::emit_edn;

fn main() {
    let json = String::from("{\"hello\": \"world\"}");
    let edn = String::from("{:hello \"world\"}");

    assert_eq!(edn, emit_edn(json));
}

Current Features

• Define struct to map EDN info EdnNode
• Define EDN types, EdnType
• Parse simples EDN data:
  • nil ""
  • String "\"string\""
  • Numbers "324352", "3442.234", "3/4"
  • Keywords :a
  • Symbol sym-bol-s
  • Vector "[1 :2 \"d\"]"
  • List "(1 :2 \"d\")"
  • Set "#{1 2 3}" For now the usage of Set is defined as a Vec<Edn>, this is due to the fact that the lib should not be necessarily responsible for assuring the Set's unicity. A solution could be changing the implementation to HashSet.
  • Map "{:a 1 :b 2 }"
• Simple data structures in one another:
  • Vec in Vec "[1 2 [:3 \"4\"]]"
  • Set in Vec "[1 2 #{:3 \"4\"}]"
  • List in List "(1 2 (:3 \"4\"))"
  • List in Set "'#{1 2 (:3 \"4\")}"
  • Maps in general "{:a 2 :b {:3 \"4\"}}", "{:a 2 :b [:3 \"4\"]}"
• Multiple simple data structures in one another (Map and Set in a vector)
• Multi deepen data structures (Map in a Set in a List in a Vec in a Vec)
• Navigate through Edn Data
• Json to Edn
  • Json String to EDN String
  • macro to process Structs and Enums to EDN
• Edn to Json