maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult slp(
    1. SlpTokenType value
    )?,
  2. TResult alp(
    1. AlpTokenType value
    )?,
  3. TResult unknown(
    1. UnknownTokenType 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( SlpTokenType value)?  slp,TResult Function( AlpTokenType value)?  alp,TResult Function( UnknownTokenType value)?  unknown,required TResult orElse(),}){
final _that = this;
switch (_that) {
case SlpTokenType() when slp != null:
return slp(_that);case AlpTokenType() when alp != null:
return alp(_that);case UnknownTokenType() when unknown != null:
return unknown(_that);case _:
  return orElse();

}
}