coopgo/node_modules/mdast-util-to-markdown/lib/util/pattern-in-scope.js

module.exports = patternInScope

function patternInScope(stack, pattern) {
  return (
    listInScope(stack, pattern.inConstruct, true) &&
    !listInScope(stack, pattern.notInConstruct)
  )
}

function listInScope(stack, list, none) {
  var index

  if (!list) {
    return none
  }

  if (typeof list === 'string') {
    list = [list]
  }

  index = -1

  while (++index < list.length) {
    if (stack.indexOf(list[index]) !== -1) {
      return true
    }
  }

  return false
}