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- /*=============================================================================
- Copyright (c) 2001-2015 Joel de Guzman
- 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/detail/lightweight_test.hpp>
- #include <boost/spirit/home/x3.hpp>
- #include <boost/fusion/adapted/struct.hpp>
- #include <boost/fusion/include/vector.hpp>
- #include <iostream>
- #include "test.hpp"
- #include "utils.hpp"
- struct adata
- {
- int a;
- boost::optional<int> b;
- };
- BOOST_FUSION_ADAPT_STRUCT(adata,
- a, b
- )
- struct test_attribute_type
- {
- template <typename Context>
- void operator()(Context& ctx) const
- {
- BOOST_TEST(typeid(decltype(_attr(ctx))).name() == typeid(boost::optional<int>).name());
- }
- };
- int
- main()
- {
- using boost::spirit::x3::traits::is_optional;
- static_assert(is_optional<boost::optional<int>>(), "is_optional problem");
- using spirit_test::test;
- using spirit_test::test_attr;
- using boost::spirit::x3::int_;
- using boost::spirit::x3::omit;
- using boost::spirit::x3::ascii::char_;
- {
- BOOST_TEST((test("1234", -int_)));
- BOOST_TEST((test("abcd", -int_, false)));
- }
- { // test propagation of unused
- using boost::fusion::at_c;
- using boost::fusion::vector;
- vector<char, char> v;
- BOOST_TEST((test_attr("a1234c", char_ >> -omit[int_] >> char_, v)));
- BOOST_TEST((at_c<0>(v) == 'a'));
- BOOST_TEST((at_c<1>(v) == 'c'));
- v = boost::fusion::vector<char, char>();
- BOOST_TEST((test_attr("a1234c", char_ >> omit[-int_] >> char_, v)));
- BOOST_TEST((at_c<0>(v) == 'a'));
- BOOST_TEST((at_c<1>(v) == 'c'));
- char ch;
- BOOST_TEST((test_attr(",c", -(',' >> char_), ch)));
- BOOST_TEST((ch == 'c'));
- }
- { // test action
- boost::optional<int> n = 0;
- BOOST_TEST((test_attr("1234", (-int_)[test_attribute_type()], n)));
- BOOST_TEST((n.get() == 1234));
- }
- {
- std::string s;
- BOOST_TEST((test_attr("abc", char_ >> -(char_ >> char_), s)));
- BOOST_TEST(s == "abc");
- }
- {
- boost::optional<int> n = 0;
- auto f = [&](auto& ctx){ n = _attr(ctx); };
- BOOST_TEST((test("1234", (-int_)[f])));
- BOOST_TEST(n.get() == 1234);
- n = boost::optional<int>();
- BOOST_TEST((test("abcd", (-int_)[f], false)));
- BOOST_TEST(!n);
- }
- {
- std::vector<adata> v;
- BOOST_TEST((test_attr("a 1 2 a 2", *('a' >> int_ >> -int_), v
- , char_(' '))));
- BOOST_TEST(2 == v.size() &&
- 1 == v[0].a && v[0].b && 2 == *(v[0].b) &&
- 2 == v[1].a && !v[1].b);
- }
- { // test move only types
- boost::optional<move_only> o;
- BOOST_TEST(test_attr("s", -synth_move_only, o));
- BOOST_TEST(o);
- }
- return boost::report_errors();
- }
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