search.go

func Search[V any](s any) iter.Seq[reflect.Value] {
	v := reflect.ValueOf(s)
	t := reflect.TypeFor[V]()
	for v.Kind() == reflect.Ptr {
		v = reflect.Indirect(v)
	}
	if v.Kind() == reflect.Struct {
		return doSearch(v, t)
	}
	return func(yield func(reflect.Value) bool) {
		if v.Kind() == t.Kind() {
			yield(v)
		}
	}
}

func doSearch(v reflect.Value, t reflect.Type) iter.Seq[reflect.Value] {
	return func(yield func(reflect.Value) bool) {
	OUTER:
		for i := 0; i < v.NumField(); i++ {
			f := v.Field(i)
			if f.Kind() == t.Kind() {
				if !yield(f) {
					break
				}
			}
			if f.Kind() == reflect.Struct {
				for inner := range doSearch(f, t) {
					if !yield(inner) {
						break OUTER
					}
				}
			}
		}
	}
}