The easiest way to get comments out of any code file... seriously?!?

get-comments.js

var highlight = require('highlight.js')
var cheerio = require('cheerio')

var strip = ['/', '#', ' ', '*', "<", ">", '-', '\\']

function getComments (str) {
  var html = highlight.highlightAuto(str).value
  var $ = cheerio.load(html)
  var lines = $('span.hljs-comment').map(function(i, el) {return $(this).text();}).get()
  return lines.map(function (l) {
    while (l.length && strip.indexOf(l[0]) !== -1) {
      l = l.slice(1)
    }
    return l
  })
}

module.exports = getComments

curious, did you investigate doing something on the engine level? surely that's more efficient and guaranteed to capture all sorts of comments