Method reserve

src/test/prevector_tests.cpp:88–94

    }

    void reserve(Size s) {
        real_vector.reserve(s);
        local_check(real_vector.capacity() >= s);
        pre_vector.reserve(s);
        local_check(pre_vector.capacity() >= s);
        test();
    }

    void insert(Size position, const T& value) {
        real_vector.insert(real_vector.begin() + position, value);