Function sublists

tests/utils/lists.cpp:183–191

GeneratorWrapper<vector<int>> sublists(GeneratorWrapper<int>&& gen, int sublen) {

    vector<int> list;
    do { list.push_back(gen.get()); } while (gen.next());

    return GeneratorWrapper<vector<int>>(
        Catch::Detail::make_unique<SublistGenerator>(
            list, sublen));
}