def isAlphanum(c)
      return false if !c || c == EOF
      return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') ||
        (c >= 'A' && c <= 'Z') || c == '_' || c == '$' ||
          c == '\\' || Array(c[0].bytes).first > 126)
    end
def isAlphanum(c)
      return false if !c || c == EOF
      return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') ||
        (c >= 'A' && c <= 'Z') || c == '_' || c == '$' ||
          c == '\\' || Array(c[0].bytes).first > 126)
    end
isAlphanum -- return true if the character is a letter, digit,
 underscore, # dollar sign, or non-ASCII character