when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String id,
    2. String version,
    3. String entry,
    4. String contractVersion,
    5. @SdkVersionRangeConverter() SdkVersionRange sdkVersionRange,
    6. @CapabilityIdListConverter() List<CapabilityId> requiredCapabilities,
    7. @MiniProgramScreenFormatConverter() MiniProgramScreenFormat screenFormat,
    8. int? screenSchemaVersion,
    9. List<CapabilityId> featureFlags,
    10. MiniProgramCachePolicy cachePolicy,
    11. MiniProgramFallback? fallback,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String id,  String version,  String entry,  String contractVersion, @SdkVersionRangeConverter()  SdkVersionRange sdkVersionRange, @CapabilityIdListConverter()  List<CapabilityId> requiredCapabilities, @MiniProgramScreenFormatConverter()  MiniProgramScreenFormat screenFormat,  int? screenSchemaVersion,  List<FeatureFlagKey> featureFlags,  MiniProgramCachePolicy cachePolicy,  MiniProgramFallback? fallback)  $default,) {final _that = this;
switch (_that) {
case _MiniProgramManifest():
return $default(_that.id,_that.version,_that.entry,_that.contractVersion,_that.sdkVersionRange,_that.requiredCapabilities,_that.screenFormat,_that.screenSchemaVersion,_that.featureFlags,_that.cachePolicy,_that.fallback);case _:
  throw StateError('Unexpected subclass');

}
}