using selfhost.shared.common.string_helpers as Str

static box RuleUsingQuotedBox {
  apply(text, path, out) {
    local lines = text.split("\n")
    local i = 0
    while i < lines.size() {
      local ln = me._ltrim(lines.get(i))
      if ln.indexOf("using ") == 0 {
        if ln.indexOf('using "') != 0 { out.push("[HC003] using must be quoted: " + path + ":" + Str.int_to_str(i+1)) }
      }
      i = i + 1
    }
  }
  _ltrim(s) { return me._ltrim_chars(s, " \t") }
  _ltrim_chars(s, cs) {
    local n = Str.len(s); local head = 0
    local i = 0
    while i < n {
      local ch = s.substring(i,i+1)
      if ch != " " && ch != "\t" { head = i; break }
      if i == n-1 { head = n }
      i = i + 1
    }
    return s.substring(head)
  }
}

static box RuleUsingQuotedMain { method main(args) { return 0 } }