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90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
// Range v3 library
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//
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// Copyright Eric Niebler 2014-present
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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/core.hpp>
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#include <range/v3/algorithm/count_if.hpp>
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#include "../simple_test.hpp"
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#include "../test_iterators.hpp"
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struct S
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{
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int i;
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};
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struct T
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{
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bool b;
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bool m() { return b; }
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};
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constexpr bool even(int i)
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{
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return i % 2 == 0;
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}
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int main()
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{
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using namespace ranges;
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auto equals = [](int i){ return std::bind(equal_to{}, i, std::placeholders::_1); };
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int ia[] = {0, 1, 2, 2, 0, 1, 2, 3};
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constexpr auto cia = size(ia);
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CHECK(count_if(InputIterator<const int*>(ia),
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Sentinel<const int*>(ia + cia), equals(2)) == 3);
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CHECK(count_if(InputIterator<const int*>(ia),
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Sentinel<const int*>(ia + cia), equals(7)) == 0);
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CHECK(count_if(InputIterator<const int*>(ia),
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Sentinel<const int*>(ia), equals(2)) == 0);
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CHECK(count_if(make_subrange(InputIterator<const int*>(ia),
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Sentinel<const int*>(ia + cia)), equals(2)) == 3);
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CHECK(count_if(make_subrange(InputIterator<const int*>(ia),
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Sentinel<const int*>(ia + cia)), equals(7)) == 0);
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CHECK(count_if(make_subrange(InputIterator<const int*>(ia),
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Sentinel<const int*>(ia)), equals(2)) == 0);
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S sa[] = {{0}, {1}, {2}, {2}, {0}, {1}, {2}, {3}};
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constexpr auto csa = size(ia);
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CHECK(count_if(InputIterator<const S*>(sa),
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Sentinel<const S*>(sa + csa), equals(2), &S::i) == 3);
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CHECK(count_if(InputIterator<const S*>(sa),
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Sentinel<const S*>(sa + csa), equals(7), &S::i) == 0);
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CHECK(count_if(InputIterator<const S*>(sa),
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Sentinel<const S*>(sa), equals(2), &S::i) == 0);
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CHECK(count_if(make_subrange(InputIterator<const S*>(sa),
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Sentinel<const S*>(sa + csa)), equals(2), &S::i) == 3);
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CHECK(count_if(make_subrange(InputIterator<const S*>(sa),
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Sentinel<const S*>(sa + csa)), equals(7), &S::i) == 0);
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CHECK(count_if(make_subrange(InputIterator<const S*>(sa),
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Sentinel<const S*>(sa)), equals(2), &S::i) == 0);
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T ta[] = {{true}, {false}, {true}, {false}, {false}, {true}, {false}, {false}, {true}, {false}};
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CHECK(count_if(InputIterator<T*>(ta),
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Sentinel<T*>(ta + size(ta)), &T::m) == 4);
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CHECK(count_if(InputIterator<T*>(ta),
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Sentinel<T*>(ta + size(ta)), &T::b) == 4);
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CHECK(count_if(make_subrange(InputIterator<T*>(ta),
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Sentinel<T*>(ta + size(ta))), &T::m) == 4);
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CHECK(count_if(make_subrange(InputIterator<T*>(ta),
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Sentinel<T*>(ta + size(ta))), &T::b) == 4);
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{
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using IL = std::initializer_list<int>;
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STATIC_CHECK(ranges::count_if(IL{0, 1, 2, 1, 3, 1, 4}, even) == 3);
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STATIC_CHECK(ranges::count_if(IL{1, 1, 3, 1}, even) == 0);
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}
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return ::test_result();
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}
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