generics method

Iterable<String> generics(dynamic k)

Implementation

Iterable<String> generics(DartType k) {
  final kc = k.element;
  if (k is! ParameterizedType ||
      kc is! ClassElement ||
      kc.typeParameters.isEmpty) {
    return [];
  }
  // maybe has type parameter type
  if (kc.fields
      .where((f) => visit(f.type, (x) {
            return x is TypeParameterType;
          }, (x, xs) => x || xs.reduce((a, b) => a || b)))
      .isEmpty) {
    return [];
  }
  final ks = k.typeArguments
      .map((x) => x.element?.displayName ?? 'dynamic')
      .toList();
  final cs = kc.typeParameters.map((x) => x.name).toList();
  final dict = <String, String>{};
  for (var idx = 0; idx < cs.length; idx++) {
    if (ks.length > idx) {
      dict[cs[idx]] = ks[idx];
    }
  }
  // redefine
  final kxx = display(k);
  final inits = <String>[];
  inits.add('ark.constructor<$kxx>(() => $kxx());');
  inits.addAll(kc.fields.mapIndexed((idx, f) {
    final m = annotation(Index, e: f);
    final i = index(idx + 1, f.name, f.type, m, refers: dict);
    final a = accessor(display(k, refers: dict)!, i, f.name);
    return 'ark.declare<$kxx>(\'${f.name}\',$a);';
  }));
  return inits;
}