1 //! In this example we build an [S-expression](https://en.wikipedia.org/wiki/S-expression) 2 //! parser and tiny [lisp](https://en.wikipedia.org/wiki/Lisp_(programming_language)) interpreter. 3 //! Lisp is a simple type of language made up of Atoms and Lists, forming easily parsable trees. 4 5 #![cfg(feature = "alloc")] 6 7 mod parser; 8 main()9fn main() { 10 let expression_1 = "((if (= (+ 3 (/ 9 3)) 11 (* 2 3)) 12 * 13 /) 14 456 123)"; 15 println!( 16 "\"{}\"\nevaled gives us: {:?}", 17 expression_1, 18 parser::eval_from_str(expression_1) 19 ); 20 } 21