class Byebug::CatchCommand

def execute
  excn = @match[1]
  if not excn
    # No args given.
    info_catch
  elsif not @match[2]
    # One arg given.
    if 'off' == excn
      Byebug.catchpoints.clear if
        confirm("Delete all catchpoints? (y or n) ")
    else
      binding = @state.context ? get_binding : TOPLEVEL_BINDING
      unless debug_eval("#{excn}.is_a?(Class)", binding)
        print "Warning #{excn} is not known to be a Class\n"
      end
      Byebug.add_catchpoint(excn)
      print "Catch exception %s.\n", excn
    end
  elsif @match[2] != 'off'
    errmsg "Off expected. Got %s\n", @match[2]
  elsif Byebug.catchpoints.member?(excn)
    Byebug.catchpoints.delete(excn)
    print "Catch for exception %s removed.\n", excn
  else
    errmsg "Catch for exception %s not found.\n", excn
  end
end

def help(cmd)
  %{
    cat[ch]\t\tsame as "info catch"
    cat[ch] <exception-name> [on|off]
rcept <exception-name> when there would otherwise be no handler.
 an "on" or "off", turn handling the exception on or off.
    cat[ch] off\tdelete all catchpoints
  }
end

def help_command
  'catch'
end

def regexp
  /^\s* cat(?:ch)?
       (?:\s+ (\S+))?
       (?:\s+ (off))? \s* $/ix
end