Method ChunkGenerator

tutorials/external/catch.hpp:3884–3895

        bool m_used_up = false;
    public:
        ChunkGenerator(size_t size, GeneratorWrapper<T> generator) :
            m_chunk_size(size), m_generator(std::move(generator))
        {
            m_chunk.reserve(m_chunk_size);
            m_chunk.push_back(m_generator.get());
            for (size_t i = 1; i < m_chunk_size; ++i) {
                if (!m_generator.next()) {
                    Catch::throw_exception(GeneratorException("Not enough values to initialize the first chunk"));
                }
                m_chunk.push_back(m_generator.get());
            }
        }
        std::vector<T> const& get() const override {
            return m_chunk;
        }