| // 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(); |
| } |