eagine/make_index.cpp

Copyright Matus Chochlik. Distributed under the Boost Software License, Version 1.0. See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt

#include <eagine/memory/span_algo.hpp>
#include <eagine/span.hpp>
#include <array>
#include <iostream>
#include <string>
#include <vector>
 
auto main() -> int {
    using namespace eagine;
    using namespace eagine::memory;
 
    std::array<const std::string, 4> list{{"foo", "baz", "qux", "bar"}};
    std::vector<std::size_t> index(list.size());
 
    generate(cover(index), [i{std::size_t{0}}]() mutable { return i++; });
 
    make_index(view(list), cover(index));
 
    for(auto i : index) {
        std::cout << list[i] << std::endl;
    }
 
    make_index(view(list), cover(index), std::greater<>());
 
    for(auto i : index) {
        std::cout << list[i] << std::endl;
    }
 
    return 0;
}