| 1 | // Copyright (c) 2001-2011 Hartmut Kaiser |
|---|
| 2 | // Copyright (c) 2011 Dean Michael Berries |
|---|
| 3 | // |
|---|
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
|---|
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
|---|
| 6 | |
|---|
| 7 | #include <boost/spirit/include/qi.hpp> |
|---|
| 8 | |
|---|
| 9 | #include <boost/core/lightweight_test.hpp> |
|---|
| 10 | #include <boost/fusion/tuple.hpp> |
|---|
| 11 | #include <string> |
|---|
| 12 | |
|---|
| 13 | struct foo_parts |
|---|
| 14 | { |
|---|
| 15 | boost::optional<std::string> first; |
|---|
| 16 | std::string second; |
|---|
| 17 | }; |
|---|
| 18 | |
|---|
| 19 | namespace boost { namespace spirit { namespace traits |
|---|
| 20 | { |
|---|
| 21 | template <> |
|---|
| 22 | struct transform_attribute<foo_parts |
|---|
| 23 | , fusion::tuple<std::string &, optional<std::string> &> |
|---|
| 24 | , spirit::qi::domain> |
|---|
| 25 | { |
|---|
| 26 | typedef fusion::tuple<std::string&, optional<std::string>&> type; |
|---|
| 27 | |
|---|
| 28 | static type pre(foo_parts & parts) |
|---|
| 29 | { |
|---|
| 30 | return fusion::tie(arg&: parts.second, arg&: parts.first); |
|---|
| 31 | } |
|---|
| 32 | |
|---|
| 33 | static void post(foo_parts &, type const &) {} |
|---|
| 34 | static void fail(foo_parts &) {} |
|---|
| 35 | }; |
|---|
| 36 | }}} |
|---|
| 37 | |
|---|
| 38 | namespace qi = boost::spirit::qi; |
|---|
| 39 | |
|---|
| 40 | template <typename Iterator> |
|---|
| 41 | struct foo_grammar : qi::grammar<Iterator, foo_parts()> |
|---|
| 42 | { |
|---|
| 43 | foo_grammar() : foo_grammar::base_type(start, "foo" ) |
|---|
| 44 | { |
|---|
| 45 | foo_part = |
|---|
| 46 | +qi::alpha >> -(+qi::digit) |
|---|
| 47 | | qi::attr(std::string()) |
|---|
| 48 | >> qi::attr(boost::optional<std::string>()) |
|---|
| 49 | ; |
|---|
| 50 | |
|---|
| 51 | start = foo_part.alias(); |
|---|
| 52 | } |
|---|
| 53 | |
|---|
| 54 | typedef boost::fusion::tuple<std::string&, boost::optional<std::string>&> |
|---|
| 55 | tuple_type; |
|---|
| 56 | |
|---|
| 57 | qi::rule<Iterator, tuple_type()> foo_part; |
|---|
| 58 | qi::rule<Iterator, foo_parts()> start; |
|---|
| 59 | }; |
|---|
| 60 | |
|---|
| 61 | int main() |
|---|
| 62 | { |
|---|
| 63 | foo_parts instance; |
|---|
| 64 | foo_grammar<std::string::iterator> grammar; |
|---|
| 65 | std::string input = "abc123" ; |
|---|
| 66 | |
|---|
| 67 | BOOST_TEST(qi::parse(input.begin(), input.end(), grammar, instance) && |
|---|
| 68 | instance.first && instance.first.get() == "123" && |
|---|
| 69 | instance.second == "abc" ); |
|---|
| 70 | |
|---|
| 71 | return boost::report_errors(); |
|---|
| 72 | } |
|---|
| 73 | |
|---|
| 74 | |
|---|
