maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>(
  1. TResult $default(
    1. MenuButtonDefault value
    )?, {
  2. TResult webApp(
    1. MenuButtonWebApp value
    )?,
  3. TResult commands(
    1. MenuButtonCommands value
    )?,
  4. required TResult orElse(),
})

A variant of map that fallback to returning orElse.

It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs
TResult maybeMap<TResult extends Object?>(
  TResult Function(MenuButtonDefault value)? $default, {
  TResult Function(MenuButtonWebApp value)? webApp,
  TResult Function(MenuButtonCommands value)? commands,
  required TResult orElse(),
}) {
  final _that = this;
  switch (_that) {
    case MenuButtonDefault() when $default != null:
      return $default(_that);
    case MenuButtonWebApp() when webApp != null:
      return webApp(_that);
    case MenuButtonCommands() when commands != null:
      return commands(_that);
    case _:
      return orElse();
  }
}