| 20 | BOOST_PARSER_DEFINE_RULES(seq1, seq2); |
| 21 | |
| 22 | int main() |
| 23 | { |
| 24 | // These are just some assorted cases that have, or seemed likely to, |
| 25 | // cause problems when an internal failure in an alternative wipes out an |
| 26 | // existing result. This covers all the cases where "if (!success)" |
| 27 | // causes the attribute to be overwritten with a default-constructed |
| 28 | // value. |
| 29 | |
| 30 | { |
| 31 | auto const parser = |
| 32 | bp::string("FOO") >> -(bp::string("bar") | bp::string("foo")); |
| 33 | |
| 34 | auto result = bp::parse("FOOfoo", parser); |
| 35 | BOOST_TEST(result); |
| 36 | BOOST_TEST(bp::get(*result, bp::llong<0>{}) == std::string("FOO")); |
| 37 | BOOST_TEST(bp::get(*result, bp::llong<1>{}) == std::string("foo")); |
| 38 | } |
| 39 | |
| 40 | { |
| 41 | auto const parser = bp::merge |
| 42 | [bp::string("FOO") >> (bp::string("bar") | bp::string("foo"))]; |
| 43 | |
| 44 | auto result = bp::parse("FOOfoo", parser); |
| 45 | BOOST_TEST(result); |
| 46 | BOOST_TEST(*result == std::string("FOOfoo")); |
| 47 | } |
| 48 | |
| 49 | { |
| 50 | auto const parser = bp::merge |
| 51 | [(bp::attr(std::vector<std::string>({"FOO"})) | bp::eps) >> |
| 52 | (bp::repeat(1)[bp::string("foo")] | bp::eps)]; |
| 53 | |
| 54 | auto result = bp::parse("", parser); |
| 55 | BOOST_TEST(result); |
| 56 | BOOST_TEST(*result); |
| 57 | BOOST_TEST(*result == std::vector<std::string>({"FOO"})); |
| 58 | } |
| 59 | |
| 60 | { |
| 61 | auto const parser = bp::merge[seq1 >> (seq2 | seq1)]; |
| 62 | |
| 63 | auto result = bp::parse("7a9a", parser); |
| 64 | BOOST_TEST(result); |
| 65 | BOOST_TEST(*result == (bp::tuple<int, char>(9, 'a'))); |
| 66 | } |
| 67 | |
| 68 | return boost::report_errors(); |
| 69 | } |