mapOrNull<TResult extends Object?> method
TResult?
mapOrNull<TResult extends Object?>({
- TResult? bytes(
- BytesModel value
- TResult? kb(
- KbModel value
- TResult? mb(
- MbModel value
- TResult? gb(
- GbModel value
- TResult? tb(
- TbModel value
A variant of map
that fallback to returning null
.
It is equivalent to doing:
switch (sealedClass) {
case final Subclass value:
return ...;
case _:
return null;
}
Implementation
@optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
TResult? Function(BytesModel value)? bytes,
TResult? Function(KbModel value)? kb,
TResult? Function(MbModel value)? mb,
TResult? Function(GbModel value)? gb,
TResult? Function(TbModel value)? tb,
}) {
final _that = this;
switch (_that) {
case BytesModel() when bytes != null:
return bytes(_that);
case KbModel() when kb != null:
return kb(_that);
case MbModel() when mb != null:
return mb(_that);
case GbModel() when gb != null:
return gb(_that);
case TbModel() when tb != null:
return tb(_that);
case _:
return null;
}
}