maybeMap<TResult extends Object?> method

@optionalTypeArgs TResult maybeMap<TResult extends Object?>({ TResult creator(ChatMemberOwner value)?, TResult administrator(ChatMemberAdministrator value)?, TResult member(ChatMemberMember value)?, TResult restricted(ChatMemberRestricted value)?, TResult left(ChatMemberLeft value)?, TResult kicked(ChatMemberBanned value)?, 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(ChatMemberOwner value)? creator,
  TResult Function(ChatMemberAdministrator value)? administrator,
  TResult Function(ChatMemberMember value)? member,
  TResult Function(ChatMemberRestricted value)? restricted,
  TResult Function(ChatMemberLeft value)? left,
  TResult Function(ChatMemberBanned value)? kicked,
  required TResult orElse(),
}) {
  final _that = this;
  switch (_that) {
    case ChatMemberOwner() when creator != null:
      return creator(_that);
    case ChatMemberAdministrator() when administrator != null:
      return administrator(_that);
    case ChatMemberMember() when member != null:
      return member(_that);
    case ChatMemberRestricted() when restricted != null:
      return restricted(_that);
    case ChatMemberLeft() when left != null:
      return left(_that);
    case ChatMemberBanned() when kicked != null:
      return kicked(_that);
    case _:
      return orElse();
  }
}