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1 | /*============================================================================= |
2 | Copyright (c) 2002 2004 2006 Joel de Guzman | |
3 | http://spirit.sourceforge.net/ | |
4 | ||
5 | Use, modification and distribution is subject to the Boost Software | |
6 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
7 | http://www.boost.org/LICENSE_1_0.txt) | |
8 | =============================================================================*/ | |
9 | #if !defined(BOOST_SPIRIT_QUICKBOOK_TEMPLATE_STACK_HPP) | |
10 | #define BOOST_SPIRIT_QUICKBOOK_TEMPLATE_STACK_HPP | |
11 | ||
12 | #include <string> | |
13 | #include <deque> | |
14 | #include <vector> | |
15 | #include <cassert> | |
16 | #include <boost/tuple/tuple.hpp> | |
17 | #include <boost/assert.hpp> | |
18 | #include <boost/spirit/include/classic_functor_parser.hpp> | |
19 | #include <boost/spirit/include/classic_symbols.hpp> | |
20 | #include <boost/next_prior.hpp> | |
21 | #include <boost/filesystem/path.hpp> | |
22 | #include "fwd.hpp" | |
23 | #include "values.hpp" | |
24 | #include "template_tags.hpp" | |
25 | ||
26 | namespace quickbook | |
27 | { | |
28 | namespace fs = boost::filesystem; | |
29 | ||
30 | struct template_scope; | |
31 | ||
32 | struct template_symbol | |
33 | { | |
34 | template_symbol( | |
35 | std::string const& identifier, | |
36 | std::vector<std::string> const& params, | |
37 | value const& content, | |
38 | template_scope const* parent = 0); | |
39 | ||
40 | std::string identifier; | |
41 | std::vector<std::string> params; | |
42 | value content; | |
43 | ||
44 | template_scope const* lexical_parent; | |
45 | }; | |
46 | ||
47 | typedef boost::spirit::classic::symbols<template_symbol> template_symbols; | |
48 | ||
49 | // template scope | |
50 | // | |
51 | // 1.4-: parent_scope is the previous scope on the dynamic | |
52 | // lookup chain. This moves up the stack skipping | |
53 | // 1.5 templates (but not 1.5 included files). | |
54 | // 1.5+: parent_scope is the template's lexical parent. | |
55 | // | |
56 | // This means that a search along the parent_scope chain will follow the | |
57 | // correct lookup chain for that version of quickboook. | |
58 | // | |
59 | // symbols contains the templates defined in this scope. | |
60 | ||
61 | struct template_scope | |
62 | { | |
63 | template_scope() : parent_scope(), parent_1_4() {} | |
64 | template_scope const* parent_scope; | |
65 | template_scope const* parent_1_4; | |
66 | template_symbols symbols; | |
67 | }; | |
68 | ||
69 | struct template_stack | |
70 | { | |
71 | typedef std::deque<template_scope> deque; | |
72 | ||
73 | struct parser | |
74 | { | |
75 | typedef boost::spirit::classic::nil_t result_t; | |
76 | ||
77 | parser(template_stack& ts) | |
78 | : ts(ts) {} | |
79 | ||
80 | template <typename Scanner> | |
81 | std::ptrdiff_t | |
82 | operator()(Scanner const& scan, result_t) const | |
83 | { | |
84 | // search all scopes for the longest matching symbol. | |
85 | typename Scanner::iterator_t f = scan.first; | |
86 | std::ptrdiff_t len = -1; | |
87 | for (template_scope const* i = &*ts.scopes.begin(); i; i = i->parent_scope) | |
88 | { | |
89 | boost::spirit::classic::match<> m = i->symbols.parse(scan); | |
90 | if (m.length() > len) | |
91 | len = m.length(); | |
92 | scan.first = f; | |
93 | } | |
94 | if (len >= 0) | |
95 | scan.first = boost::next(f, len); | |
96 | return len; | |
97 | } | |
98 | ||
99 | template_stack& ts; | |
100 | }; | |
101 | ||
102 | template_stack(); | |
103 | template_symbol* find(std::string const& symbol) const; | |
104 | template_symbol* find_top_scope(std::string const& symbol) const; | |
105 | template_symbols const& top() const; | |
106 | template_scope const& top_scope() const; | |
107 | // Add the given template symbol to the current scope. | |
108 | // If it doesn't have a scope, sets the symbol's scope to the current scope. | |
109 | bool add(template_symbol const&); | |
110 | void push(); | |
111 | void pop(); | |
112 | ||
113 | void start_template(template_symbol const*); | |
114 | ||
115 | boost::spirit::classic::functor_parser<parser> scope; | |
116 | ||
117 | private: | |
118 | ||
119 | friend struct parser; | |
120 | deque scopes; | |
121 | template_scope const* parent_1_4; | |
122 | }; | |
123 | } | |
124 | ||
125 | #endif // BOOST_SPIRIT_QUICKBOOK_TEMPLATE_STACK_HPP | |
126 |