| /////////////////////////////////////////////////////////////////////////////// |
| // test_assert_with_placeholder.hpp |
| // |
| // Copyright 2008 Eric Niebler. Distributed under 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/xpressive/xpressive.hpp> |
| #include <boost/xpressive/regex_actions.hpp> |
| #include <boost/test/unit_test.hpp> |
| |
| using namespace boost::xpressive; |
| |
| placeholder<int> const _cnt = {{}}; |
| |
| struct count_a_impl |
| { |
| typedef void result_type; |
| |
| void operator()(int &cnt) const |
| { |
| ++cnt; |
| } |
| }; |
| |
| boost::xpressive::function<count_a_impl>::type const count_a = {{}}; |
| |
| struct check_a_impl |
| { |
| typedef bool result_type; |
| |
| bool operator()(int &cnt, int val) const |
| { |
| if(cnt < val) |
| { |
| ++cnt; |
| return true; |
| } |
| return false; |
| } |
| }; |
| |
| boost::xpressive::function<check_a_impl>::type const check_a = {{}}; |
| |
| void test_assert_with_placeholder() |
| { |
| int cnt = 0; |
| std::string a_str("a_aaaaa___a_aa_aaa_"); |
| const sregex expr1(*(as_xpr('a')[count_a(_cnt)] | '_')); |
| const sregex expr2(*(as_xpr('a')[check(check_a(_cnt, 5))] | '_')); |
| |
| sregex_iterator iter1(a_str.begin(), a_str.end(), expr1, |
| let(_cnt = cnt)); |
| BOOST_CHECK_EQUAL(iter1->str(0), a_str); |
| BOOST_CHECK_EQUAL(cnt, 12); |
| |
| cnt = 0; |
| sregex_iterator iter2(a_str.begin(), a_str.end(), expr2, |
| let(_cnt = cnt)); |
| |
| BOOST_CHECK_EQUAL(iter2->str(0), std::string("a_aaaa")); |
| BOOST_CHECK_EQUAL(cnt, 5); |
| } |
| |
| using namespace boost::unit_test; |
| /////////////////////////////////////////////////////////////////////////////// |
| // init_unit_test_suite |
| // |
| test_suite* init_unit_test_suite( int argc, char* argv[] ) |
| { |
| test_suite *test = BOOST_TEST_SUITE("test that custom assertions can use argument placeholders"); |
| |
| test->add(BOOST_TEST_CASE(&test_assert_with_placeholder)); |
| |
| return test; |
| } |