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- // Boost.Range library
- //
- // Copyright Neil Groves 2014. Use, modification and distribution is subject
- // to the Boost Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- //
- // For more information, see http://www.boost.org/libs/range
- //
- #include "mock_range.hpp"
- #include <boost/range/adaptor/adjacent_filtered.hpp>
- namespace
- {
- struct always_true
- {
- typedef bool result_type;
- bool operator()(int, int) const
- {
- return true;
- }
- };
- } // anonymous namespace
- int main(int, const char**)
- {
- using boost::range::unit_test::mock_const_range;
- using boost::adaptors::adjacent_filtered;
- // This next line should fail when Boost.Range concept checking is
- // enabled since the adjacent_filtered adaptor takes at least a
- // ForwardRange.
- return (mock_const_range<boost::single_pass_traversal_tag>() |
- adjacent_filtered(always_true())).front();
- }
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