generateSeed method
SeedCallback<T> ?
generateSeed({
- int? startOffset,
- SeedCallback<
T> ? override, - SeedCallback<
T> ? fallback,
Implementation
SeedCallback<T>? generateSeed({
int? startOffset,
SeedCallback<T>? override,
SeedCallback<T>? fallback,
}) {
if (override != null) return override;
_maybeSeedValue();
if (startOffset != null) {
return valueAt(startOffset).p(O.fold(
() => fallback,
(v) => () => O.some(v),
));
}
final fallbackOption = O.fromNullable(fallback);
return () => value.p(O.alt(() => fallbackOption.p(O.flatMap((f) => f()))));
}