class Byebug::FrameCommand

def description
  %(f[rame][ frame-number]
    Move the current frame to the specified frame number, or the 0 if no
    frame-number has been given.
    A negative number indicates position from the other end, so
    "frame -1" moves to the oldest frame, and "frame 0" moves to the
    newest frame.
    Without an argument, the command prints the current stack frame. Since
    the current position is redisplayed, it may trigger a resyncronization
    if there is a front end also watching over things.)
end

def execute
  return print_frame @state.frame_pos unless @match[1]
  pos, err = get_int(@match[1], 'Frame')
  return errmsg(err) unless pos
  adjust_frame(pos, true)
end

def names
  %w(frame)
end

def regexp
  /^\s* f(?:rame)? (?:\s+(\S+))? \s*$/x
end