61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
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// Copyright David Abrahams 2004. Use, modification and distribution is
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// subject to the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/iterator/iterator_adaptor.hpp>
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#include <boost/pending/iterator_tests.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <cassert>
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struct mutable_it : boost::iterator_adaptor<mutable_it,int*>
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{
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typedef boost::iterator_adaptor<mutable_it,int*> super_t;
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mutable_it();
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explicit mutable_it(int* p) : super_t(p) {}
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bool equal(mutable_it const& rhs) const
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{
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return this->base() == rhs.base();
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}
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};
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struct constant_it : boost::iterator_adaptor<constant_it,int const*>
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{
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typedef boost::iterator_adaptor<constant_it,int const*> super_t;
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constant_it();
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explicit constant_it(int* p) : super_t(p) {}
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constant_it(mutable_it const& x) : super_t(x.base()) {}
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bool equal(constant_it const& rhs) const
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{
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return this->base() == rhs.base();
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}
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};
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int main()
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{
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int data[] = { 49, 77 };
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mutable_it i(data);
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constant_it j(data + 1);
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BOOST_TEST(i < j);
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BOOST_TEST(j > i);
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BOOST_TEST(i <= j);
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BOOST_TEST(j >= i);
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BOOST_TEST(j - i == 1);
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BOOST_TEST(i - j == -1);
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constant_it k = i;
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BOOST_TEST(!(i < k));
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BOOST_TEST(!(k > i));
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BOOST_TEST(i <= k);
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BOOST_TEST(k >= i);
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BOOST_TEST(k - i == 0);
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BOOST_TEST(i - k == 0);
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return boost::report_errors();
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}
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