maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult fromString(
    1. ErrorString value
    )?,
  2. TResult fromMap(
    1. ErrorMap value
    )?,
  3. 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( ErrorString value)?  fromString,TResult Function( ErrorMap value)?  fromMap,required TResult orElse(),}){
final _that = this;
switch (_that) {
case ErrorString() when fromString != null:
return fromString(_that);case ErrorMap() when fromMap != null:
return fromMap(_that);case _:
  return orElse();

}
}