An EDN (Extensible Data Notation) parser.
```rust extern crate edn;
use edn::parser::Parser;
fn main() { let str = "(defn sum [xs] (reduce + 0 xs)) (println (sum [1 2 3 4 5]))";
let mut parser = Parser::new(str);
println!("{:?}", parser.read());
println!("{:?}", parser.read());
} ```
prints
rust
Some(Ok(List([Symbol("defn"), Symbol("sum"), Vector([Symbol("xs")]), List([Symbol("reduce"), Symbol("+"), Integer(0), Symbol("xs")])])))
Some(Ok(List([Symbol("println"), List([Symbol("sum"), Vector([Integer(1), Integer(2), Integer(3), Integer(4), Integer(5)])])])))
MIT