rem: test->add( BOOST_TEST_CASE(&erase_test));
add: using namespace boost::spirit;  const char* cp = "one,two,three"; const char* cp_first = cp; const char* cp_last = cp + strlen(cp); const char* cp_i[] = {"one","two","three"}; size_t i; typedef std::map<std::string, int> map_string_type; map_string_type c; map_string_type::const_iterator it_find;  scanner<char const*> scan(cp_first, cp_last); match<> hit;  c["one"]=1; c["two"]=2; c["three"]=3; c["four"]=4;  hit = (*((+alpha_p)[ erase_a(c) ] >> !ch_p(','))).parse(scan);  BOOST_CHECK(hit); BOOST_CHECK_EQUAL(scan.first, scan.last); BOOST_CHECK_EQUAL( c.size(), static_cast<map_string_type::size_type>(1)); for (i=0;i<3;++i) { it_find = c.find(cp_i[i]); BOOST_CHECK( it_find == c.end() ); } scan.first = cp;
context: void erase_action_test(boost::unit_test_framework::test_suite* test){    test->add( BOOST_TEST_CASE(&erase_test));}