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- ///////////////////////////////////////////////////////////////////////////////
- // 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;
- }
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