when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>({ required TResult str(String field0), required TResult int(PlatformInt64 field0), required TResult float(double field0), required TResult bool(bool field0), required TResult listStr(List<String> field0), required TResult listInt(Int64List field0), })

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?>({
  required TResult Function(String field0) str,
  required TResult Function(PlatformInt64 field0) int,
  required TResult Function(double field0) float,
  required TResult Function(bool field0) bool,
  required TResult Function(List<String> field0) listStr,
  required TResult Function(Int64List field0) listInt,
}) {
  final _that = this;
  switch (_that) {
    case PyArgument_Str():
      return str(_that.field0);
    case PyArgument_Int():
      return int(_that.field0);
    case PyArgument_Float():
      return float(_that.field0);
    case PyArgument_Bool():
      return bool(_that.field0);
    case PyArgument_ListStr():
      return listStr(_that.field0);
    case PyArgument_ListInt():
      return listInt(_that.field0);
  }
}