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mirror_range-v3
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example/accumulate_ints.cpp
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Eric Niebler
view and action examples; workaround for gcc-7/8 ICE, fixes #1105 (#1274)
23 авг 2019, 07:24
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23 авг 2019, 07:24
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// Range v3 library // // Copyright Eric Niebler 2019 // // Use, modification and distribution is subject to 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) // // Project home: https://github.com/ericniebler/range-v3 // ///[accumulate_ints] // Sums the first ten squares and prints them, using views::ints to generate // and infinite range of integers, views::transform to square them, views::take // to drop all but the first 10, and accumulate to sum them. #include <iostream> #include <vector> #include <range/v3/numeric/accumulate.hpp> #include <range/v3/view/iota.hpp> #include <range/v3/view/take.hpp> #include <range/v3/view/transform.hpp> using std::cout; int main() { using namespace ranges; int sum = accumulate(views::ints(1, unreachable) | views::transform([](int i) { return i * i; }) | views::take(10), 0); // prints: 385 cout << sum << '\n'; } ///[accumulate_ints]