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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
// Range v3 library
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//
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// Copyright Eric Niebler 2014
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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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#include <range/v3/algorithm/copy_if.hpp>
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#include "../array.hpp"
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#include "../simple_test.hpp"
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constexpr bool is_even(int i)
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{
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return i % 2 == 0;
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}
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constexpr bool test_constexpr()
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{
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using namespace ranges;
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test::array<int, 4> a{{1, 2, 3, 4}};
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test::array<int, 4> b{{0, 0, 0, 0}};
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const auto res = copy_if(a, ranges::begin(b), is_even);
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STATIC_CHECK_RETURN(res.in == end(a));
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STATIC_CHECK_RETURN(res.out == begin(b) + 2);
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STATIC_CHECK_RETURN(a[0] == 1);
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STATIC_CHECK_RETURN(a[1] == 2);
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STATIC_CHECK_RETURN(a[2] == 3);
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STATIC_CHECK_RETURN(a[3] == 4);
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STATIC_CHECK_RETURN(b[0] == 2);
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STATIC_CHECK_RETURN(b[1] == 4);
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STATIC_CHECK_RETURN(b[2] == 0);
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STATIC_CHECK_RETURN(b[3] == 0);
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return true;
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}
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int main()
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{
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STATIC_CHECK(test_constexpr());
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return test_result();
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}
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