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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 | ||
10 | #include <cassert> | |
11 | #include "template_stack.hpp" | |
12 | #include "files.hpp" | |
13 | ||
14 | #ifdef BOOST_MSVC | |
15 | #pragma warning(disable : 4355) | |
16 | #endif | |
17 | ||
18 | namespace quickbook | |
19 | { | |
20 | template_symbol::template_symbol( | |
b32b8144 FG |
21 | std::string const& identifier_, |
22 | std::vector<std::string> const& params_, | |
23 | value const& content_, | |
24 | template_scope const* lexical_parent_) | |
25 | : identifier(identifier_) | |
26 | , params(params_) | |
27 | , content(content_) | |
28 | , lexical_parent(lexical_parent_) | |
7c673cae FG |
29 | { |
30 | assert(content.get_tag() == template_tags::block || | |
31 | content.get_tag() == template_tags::phrase || | |
32 | content.get_tag() == template_tags::snippet); | |
33 | } | |
34 | ||
35 | template_stack::template_stack() | |
36 | : scope(template_stack::parser(*this)) | |
37 | , scopes() | |
38 | , parent_1_4(0) | |
39 | { | |
40 | scopes.push_front(template_scope()); | |
41 | parent_1_4 = &scopes.front(); | |
42 | } | |
43 | ||
44 | template_symbol* template_stack::find(std::string const& symbol) const | |
45 | { | |
46 | for (template_scope const* i = &*scopes.begin(); i; i = i->parent_scope) | |
47 | { | |
48 | if (template_symbol* ts = boost::spirit::classic::find(i->symbols, symbol.c_str())) | |
49 | return ts; | |
50 | } | |
51 | return 0; | |
52 | } | |
53 | ||
54 | template_symbol* template_stack::find_top_scope(std::string const& symbol) const | |
55 | { | |
56 | return boost::spirit::classic::find(scopes.front().symbols, symbol.c_str()); | |
57 | } | |
58 | ||
59 | template_symbols const& template_stack::top() const | |
60 | { | |
61 | BOOST_ASSERT(!scopes.empty()); | |
62 | return scopes.front().symbols; | |
63 | } | |
64 | ||
65 | template_scope const& template_stack::top_scope() const | |
66 | { | |
67 | BOOST_ASSERT(!scopes.empty()); | |
68 | return scopes.front(); | |
69 | } | |
70 | ||
71 | bool template_stack::add(template_symbol const& ts) | |
72 | { | |
73 | BOOST_ASSERT(!scopes.empty()); | |
74 | BOOST_ASSERT(ts.lexical_parent); | |
75 | ||
76 | if (this->find_top_scope(ts.identifier)) { | |
77 | return false; | |
78 | } | |
79 | ||
80 | boost::spirit::classic::add(scopes.front().symbols, | |
81 | ts.identifier.c_str(), ts); | |
82 | ||
83 | return true; | |
84 | } | |
85 | ||
86 | void template_stack::push() | |
87 | { | |
88 | template_scope const& old_front = scopes.front(); | |
89 | scopes.push_front(template_scope()); | |
90 | scopes.front().parent_1_4 = parent_1_4; | |
91 | scopes.front().parent_scope = &old_front; | |
92 | parent_1_4 = &scopes.front(); | |
93 | } | |
94 | ||
95 | void template_stack::pop() | |
96 | { | |
97 | parent_1_4 = scopes.front().parent_1_4; | |
98 | scopes.pop_front(); | |
99 | } | |
100 | ||
101 | void template_stack::start_template(template_symbol const* symbol) | |
102 | { | |
103 | // Quickbook 1.4-: When expanding the template continue to use the | |
104 | // current scope (the dynamic scope). | |
105 | // Quickbook 1.5+: Use the scope the template was defined in | |
106 | // (the static scope). | |
107 | if (symbol->content.get_file()->version() >= 105u) | |
108 | { | |
109 | parent_1_4 = scopes.front().parent_1_4; | |
110 | scopes.front().parent_scope = symbol->lexical_parent; | |
111 | } | |
112 | else | |
113 | { | |
114 | scopes.front().parent_scope = scopes.front().parent_1_4; | |
115 | } | |
116 | } | |
117 | } | |
118 | ||
119 |