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- // Copyright David Abrahams 2004. 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)
- #include <boost/iterator/iterator_adaptor.hpp>
- #include <boost/pending/iterator_tests.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <cassert>
- struct mutable_it : boost::iterator_adaptor<mutable_it,int*>
- {
- typedef boost::iterator_adaptor<mutable_it,int*> super_t;
-
- mutable_it();
- explicit mutable_it(int* p) : super_t(p) {}
-
- bool equal(mutable_it const& rhs) const
- {
- return this->base() == rhs.base();
- }
- };
- struct constant_it : boost::iterator_adaptor<constant_it,int const*>
- {
- typedef boost::iterator_adaptor<constant_it,int const*> super_t;
-
- constant_it();
- explicit constant_it(int* p) : super_t(p) {}
- constant_it(mutable_it const& x) : super_t(x.base()) {}
- bool equal(constant_it const& rhs) const
- {
- return this->base() == rhs.base();
- }
- };
- int main()
- {
- int data[] = { 49, 77 };
-
- mutable_it i(data);
- constant_it j(data + 1);
- BOOST_TEST(i < j);
- BOOST_TEST(j > i);
- BOOST_TEST(i <= j);
- BOOST_TEST(j >= i);
- BOOST_TEST(j - i == 1);
- BOOST_TEST(i - j == -1);
-
- constant_it k = i;
- BOOST_TEST(!(i < k));
- BOOST_TEST(!(k > i));
- BOOST_TEST(i <= k);
- BOOST_TEST(k >= i);
- BOOST_TEST(k - i == 0);
- BOOST_TEST(i - k == 0);
-
- return boost::report_errors();
- }
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