1 /*=============================================================================
2 Copyright (c) 2001-2015 Joel de Guzman
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/detail/lightweight_test.hpp>
8 #include <boost/spirit/home/x3.hpp>
9 #include <boost/fusion/adapted/struct.hpp>
10 #include <boost/fusion/include/vector.hpp>
11
12 #include <iostream>
13 #include "test.hpp"
14 #include "utils.hpp"
15
16 struct adata
17 {
18 int a;
19 boost::optional<int> b;
20 };
21
22 BOOST_FUSION_ADAPT_STRUCT(adata,
23 a, b
24 )
25
26 struct test_attribute_type
27 {
28 template <typename Context>
operator ()test_attribute_type29 void operator()(Context& ctx) const
30 {
31 BOOST_TEST(typeid(decltype(_attr(ctx))).name() == typeid(boost::optional<int>).name());
32 }
33 };
34
35 int
main()36 main()
37 {
38 using boost::spirit::x3::traits::is_optional;
39
40 static_assert(is_optional<boost::optional<int>>(), "is_optional problem");
41
42 using spirit_test::test;
43 using spirit_test::test_attr;
44
45 using boost::spirit::x3::int_;
46 using boost::spirit::x3::omit;
47 using boost::spirit::x3::ascii::char_;
48
49 BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(-int_);
50
51 {
52 BOOST_TEST((test("1234", -int_)));
53 BOOST_TEST((test("abcd", -int_, false)));
54
55 boost::optional<int> n;
56 BOOST_TEST(test_attr("", -int_, n))
57 && BOOST_TEST(!n);
58 BOOST_TEST(test_attr("123", -int_, n))
59 && BOOST_TEST(n) && BOOST_TEST_EQ(*n, 123);
60
61 boost::optional<std::string> s;
62 BOOST_TEST(test_attr("", -+char_, s))
63 && BOOST_TEST(!s);
64 BOOST_TEST(test_attr("abc", -+char_, s))
65 && BOOST_TEST(s) && BOOST_TEST_EQ(*s, "abc");
66 }
67
68 { // test propagation of unused
69 using boost::fusion::at_c;
70 using boost::fusion::vector;
71
72 vector<char, char> v;
73 BOOST_TEST((test_attr("a1234c", char_ >> -omit[int_] >> char_, v)));
74 BOOST_TEST((at_c<0>(v) == 'a'));
75 BOOST_TEST((at_c<1>(v) == 'c'));
76
77 v = boost::fusion::vector<char, char>();
78 BOOST_TEST((test_attr("a1234c", char_ >> omit[-int_] >> char_, v)));
79 BOOST_TEST((at_c<0>(v) == 'a'));
80 BOOST_TEST((at_c<1>(v) == 'c'));
81
82 char ch;
83 BOOST_TEST((test_attr(",c", -(',' >> char_), ch)));
84 BOOST_TEST((ch == 'c'));
85 }
86
87 { // test action
88 boost::optional<int> n = 0;
89 BOOST_TEST((test_attr("1234", (-int_)[test_attribute_type()], n)));
90 BOOST_TEST((n.get() == 1234));
91 }
92
93 {
94 std::string s;
95 BOOST_TEST((test_attr("abc", char_ >> -(char_ >> char_), s)));
96 BOOST_TEST(s == "abc");
97 }
98
99 {
100 boost::optional<int> n = 0;
101 auto f = [&](auto& ctx){ n = _attr(ctx); };
102
103 BOOST_TEST((test("1234", (-int_)[f])));
104 BOOST_TEST(n.get() == 1234);
105
106 n = boost::optional<int>();
107 BOOST_TEST((test("abcd", (-int_)[f], false)));
108 BOOST_TEST(!n);
109 }
110
111 {
112 std::vector<adata> v;
113 BOOST_TEST((test_attr("a 1 2 a 2", *('a' >> int_ >> -int_), v
114 , char_(' '))));
115 BOOST_TEST(2 == v.size() &&
116 1 == v[0].a && v[0].b && 2 == *(v[0].b) &&
117 2 == v[1].a && !v[1].b);
118 }
119
120 { // test move only types
121 boost::optional<move_only> o;
122 BOOST_TEST(test_attr("s", -synth_move_only, o));
123 BOOST_TEST(o);
124 }
125
126 return boost::report_errors();
127 }
128