| 1 | // Boost.Range library |
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| 2 | // |
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| 3 | // Copyright Neil Groves 2014. Use, modification and distribution is subject |
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| 4 | // to the Boost Software License, Version 1.0. (See accompanying file |
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| 5 | // LICENSE_1_0.txt or copy at |
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| 6 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 7 | // |
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| 8 | // For more information, see http://www.boost.org/libs/range |
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| 9 | // |
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| 10 | |
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| 11 | #include "mock_range.hpp" |
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| 12 | #include <boost/range/adaptor/adjacent_filtered.hpp> |
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| 13 | |
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| 14 | namespace |
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| 15 | { |
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| 16 | |
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| 17 | struct always_true |
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| 18 | { |
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| 19 | typedef bool result_type; |
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| 20 | |
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| 21 | bool operator()(int, int) const |
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| 22 | { |
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| 23 | return true; |
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| 24 | } |
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| 25 | }; |
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| 26 | |
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| 27 | } // anonymous namespace |
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| 28 | |
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| 29 | int main(int, const char**) |
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| 30 | { |
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| 31 | using boost::range::unit_test::mock_const_range; |
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| 32 | using boost::adaptors::adjacent_filtered; |
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| 33 | |
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| 34 | // This next line should fail when Boost.Range concept checking is |
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| 35 | // enabled since the adjacent_filtered adaptor takes at least a |
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| 36 | // ForwardRange. |
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| 37 | return (mock_const_range<boost::single_pass_traversal_tag>() | |
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| 38 | adjacent_filtered(always_true())).front(); |
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| 39 | } |
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| 40 | |
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