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1 | // Copyright (c) 2001-2010 Hartmut Kaiser |
2 | // | |
3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | /////////////////////////////////////////////////////////////////////////////// | |
7 | // | |
8 | // Several small snippets generating different C++ code constructs | |
9 | // | |
10 | // [ HK October 08, 2009 ] Spirit V2.2 | |
11 | // | |
12 | /////////////////////////////////////////////////////////////////////////////// | |
13 | ||
7c673cae | 14 | #include <boost/spirit/include/karma.hpp> |
1e59de90 | 15 | #include <boost/phoenix.hpp> |
7c673cae FG |
16 | |
17 | #include <iostream> | |
18 | #include <string> | |
19 | #include <complex> | |
20 | ||
21 | namespace client | |
22 | { | |
23 | namespace karma = boost::spirit::karma; | |
24 | namespace phoenix = boost::phoenix; | |
25 | ||
26 | // create for instance: int name[5] = { 1, 2, 3, 4, 5 }; | |
27 | template <typename Iterator> | |
28 | struct int_array : karma::grammar<Iterator, std::vector<int>()> | |
29 | { | |
30 | int_array(char const* name) : int_array::base_type(start) | |
31 | { | |
32 | using karma::int_; | |
33 | using karma::uint_; | |
34 | using karma::eol; | |
35 | using karma::lit; | |
36 | using karma::_val; | |
37 | using karma::_r1; | |
38 | ||
39 | start = array_def(phoenix::size(_val)) << " = " << initializer | |
40 | << ';' << eol; | |
41 | array_def = "int " << lit(name) << "[" << uint_(_r1) << "]"; | |
42 | initializer = "{ " << -(int_ % ", ") << " }"; | |
43 | } | |
44 | ||
45 | karma::rule<Iterator, void(unsigned)> array_def; | |
46 | karma::rule<Iterator, std::vector<int>()> initializer; | |
47 | karma::rule<Iterator, std::vector<int>()> start; | |
48 | }; | |
49 | ||
50 | typedef std::back_insert_iterator<std::string> iterator_type; | |
51 | bool generate_array(char const* name, std::vector<int> const& v) | |
52 | { | |
53 | std::string generated; | |
54 | iterator_type sink(generated); | |
55 | int_array<iterator_type> g(name); | |
56 | if (karma::generate(sink, g, v)) | |
57 | { | |
58 | std::cout << generated; | |
59 | return true; | |
60 | } | |
61 | return false; | |
62 | } | |
63 | } | |
64 | ||
65 | /////////////////////////////////////////////////////////////////////////////// | |
66 | // Main program | |
67 | /////////////////////////////////////////////////////////////////////////////// | |
68 | int main() | |
69 | { | |
70 | // generate an array of integers with initializers | |
71 | std::vector<int> v; | |
72 | v.push_back(1); | |
73 | v.push_back(2); | |
74 | v.push_back(3); | |
75 | v.push_back(4); | |
76 | client::generate_array("array1", v); | |
77 | ||
78 | return 0; | |
79 | } |