class Byebug::UndisplayCommand

def self.description
  <<-EOD
    undisp[lay][ nnn]
    #{short_description}
    Arguments are the code numbers of the expressions to stop displaying. No
    argument means cancel all automatic-display expressions. Type "info
    display" to see the current list of code numbers.
  EOD
end

def self.regexp
  /^\s* undisp(?:lay)? (?:\s+(\S+))? \s*$/x
end

def self.short_description
  'Stops displaying all or some expressions when program stops'
end

def execute
  if @match[1]
    pos, err = get_int(@match[1], 'Undisplay', 1, Byebug.displays.size)
    return errmsg(err) unless err.nil?
    unless Byebug.displays[pos - 1]
      return errmsg(pr('display.errors.undefined', expr: pos))
    end
    Byebug.displays[pos - 1][0] = nil
  else
    return unless confirm(pr('display.confirmations.clear_all'))
    Byebug.displays.each { |d| d[0] = false }
  end
end