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41 lines
1.1 KiB
C++
41 lines
1.1 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/iterator/counted_iterator.hpp>
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#include "../simple_test.hpp"
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// iterator that models input_iterator (has void-returning postfix increment operator)
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struct Iterator
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{
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using value_type = int;
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using difference_type = int;
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int counter = 0;
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int operator*() const { return counter; }
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Iterator& operator++() { ++counter; return *this; }
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void operator++(int) { ++counter; }
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bool operator==(const Iterator& rhs) const { return counter == rhs.counter; }
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bool operator!=(const Iterator& rhs) const { return !(*this == rhs); }
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};
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int main()
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{
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CPP_assert(ranges::input_iterator<Iterator>);
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auto cnt = ranges::counted_iterator<Iterator>(Iterator(), 1);
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CHECK(*cnt == 0);
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cnt++;
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CHECK(cnt == ranges::default_sentinel);
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return test_result();
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}
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