formatter breaks code that has comments

[dragoncoder047]

const code = `
(define i 0) ;;
(define i (let ((i 2)) (+ i 3)))
`;
async function main() {
  /* this is head of devel branch when I wrote this */
  const lips = await import("https://cdn.jsdelivr.net/gh/jcubic/lips@74055b5a1172ff48e3fe075e319142b840c492c1/dist/lips.esm.min.js");
  console.log(code);

  console.log(new lips.Formatter(code).break().format());
}
main();

it prints that the formatted code is

(define i 0)
;;  (define i (let ((i 2))
(+ i 3)))  

which is syntax error.

if the initial code is this:

(define i 0) ;;
(define i 1)

the formatted output is:

(define i 0)

which is syntactically correct but not complete.

[jcubic]

So comments are not handled in any way with the formatter, the formatter was used with code returned by the parser, and the parser strips any comments.

I need to check how it works in the REPL that pretty printed when you copy and paste.

[jcubic]

It should be fixed but note that formatter has a lot of issues. The main that may be important to your use, is that it don't add breaks after S-Expression.

This is the issue track formatter:

• https://github.com/jcubic/lips/issues/189

I wanted to fix this quickly, but it requires a bit more work.

Note that formatter is rule based and the rules are located in lips.Formatter.rules, but it's not documented.