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36 lines
999 B
C++
36 lines
999 B
C++
// Range v3 library
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//
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// Copyright Eric Niebler 2019
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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///[comprehension_conversion]
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// Use a range comprehension (views::for_each) to construct a custom range, and
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// then convert it to a std::vector.
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#include <iostream>
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#include <vector>
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#include <range/v3/range/conversion.hpp>
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#include <range/v3/view/for_each.hpp>
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#include <range/v3/view/iota.hpp>
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#include <range/v3/view/repeat_n.hpp>
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using std::cout;
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int main()
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{
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using namespace ranges;
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auto vi = views::for_each(views::ints(1, 6),
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[](int i) { return yield_from(views::repeat_n(i, i)); }) |
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to<std::vector>();
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// prints: [1,2,2,3,3,3,4,4,4,4,5,5,5,5,5]
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cout << views::all(vi) << '\n';
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}
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///[comprehension_conversion]
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