1/*=============================================================================
2 Copyright (c) 2001-2011 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/spirit/include/qi_optional.hpp>
8
9#include <boost/spirit/include/qi_char.hpp>
10#include <boost/spirit/include/qi_numeric.hpp>
11#include <boost/spirit/include/qi_operator.hpp>
12#include <boost/spirit/include/qi_action.hpp>
13#include <boost/spirit/include/qi_directive.hpp>
14#include <boost/spirit/include/support_argument.hpp>
15#include <boost/phoenix/core.hpp>
16#include <boost/phoenix/operator.hpp>
17#include <boost/fusion/adapted/struct.hpp>
18
19#include <iostream>
20#include "test.hpp"
21
22#ifdef _MSC_VER
23// bogus https://developercommunity.visualstudio.com/t/buggy-warning-c4709/471956
24# pragma warning(disable: 4709) // comma operator within array index expression
25#endif
26
27struct adata
28{
29 int a;
30 boost::optional<int> b;
31};
32
33BOOST_FUSION_ADAPT_STRUCT(
34 adata,
35 (int, a)
36 (boost::optional<int>, b)
37)
38
39struct test_attribute_type
40{
41 template <typename Attribute, typename Context>
42 void operator()(Attribute&, Context&, bool&) const
43 {
44 BOOST_TEST(typeid(Attribute).name() == typeid(boost::optional<int>).name());
45 }
46};
47
48int
49main()
50{
51 using spirit_test::test;
52 using spirit_test::test_attr;
53
54 using boost::spirit::qi::_1;
55 using boost::spirit::qi::int_;
56 using boost::spirit::qi::omit;
57 using boost::spirit::ascii::char_;
58
59 {
60 BOOST_TEST((test("1234", -int_)));
61 BOOST_TEST((test("abcd", -int_, false)));
62
63 boost::optional<int> n;
64 BOOST_TEST(test_attr("", -int_, n))
65 && BOOST_TEST(!n);
66 BOOST_TEST(test_attr("123", -int_, n))
67 && BOOST_TEST(n) && BOOST_TEST_EQ(*n, 123);
68
69 boost::optional<std::string> s;
70 BOOST_TEST(test_attr("", -+char_, s))
71 && BOOST_TEST(!s);
72 BOOST_TEST(test_attr("abc", -+char_, s))
73 && BOOST_TEST(s) && BOOST_TEST_EQ(*s, "abc");
74 }
75
76 { // test propagation of unused
77 using boost::fusion::at_c;
78 using boost::fusion::vector;
79
80 vector<char, char> v;
81 BOOST_TEST((test_attr("a1234c", char_ >> -omit[int_] >> char_, v)));
82 BOOST_TEST((at_c<0>(v) == 'a'));
83 BOOST_TEST((at_c<1>(v) == 'c'));
84
85 v = boost::fusion::vector<char, char>();
86 BOOST_TEST((test_attr("a1234c", char_ >> omit[-int_] >> char_, v)));
87 BOOST_TEST((at_c<0>(v) == 'a'));
88 BOOST_TEST((at_c<1>(v) == 'c'));
89
90 char ch;
91 BOOST_TEST((test_attr(",c", -(',' >> char_), ch)));
92 BOOST_TEST((ch == 'c'));
93 }
94
95 { // test action
96 boost::optional<int> n = 0;
97 BOOST_TEST((test_attr("1234", (-int_)[test_attribute_type()], n)));
98 BOOST_TEST((n.get() == 1234));
99 }
100
101 {
102 std::string s;
103 BOOST_TEST((test_attr("abc", char_ >> -(char_ >> char_), s)));
104 BOOST_TEST(s == "abc");
105 }
106
107 {
108 namespace phx = boost::phoenix;
109
110 boost::optional<int> n = 0;
111 BOOST_TEST((test("1234", (-int_)[phx::ref(n) = _1])));
112 BOOST_TEST(n.get() == 1234);
113
114 n = boost::optional<int>();
115 BOOST_TEST((test("abcd", (-int_)[phx::ref(n) = _1], false)));
116 BOOST_TEST(!n);
117 }
118
119 {
120 std::vector<adata> v;
121 BOOST_TEST((test_attr("a 1 2 a 2", *("a" >> int_ >> -int_), v
122 , char_(' '))));
123 BOOST_TEST(2 == v.size() &&
124 1 == v[0].a && v[0].b && 2 == *(v[0].b) &&
125 2 == v[1].a && !v[1].b);
126 }
127
128 return boost::report_errors();
129}
130

source code of boost/libs/spirit/test/qi/optional.cpp