1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
// file : libbuild2/scope.ixx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
namespace build2
{
// scope
//
inline bool scope::
root () const
{
return root_ == this;
}
inline bool scope::
amalgamatable () const
{
return (root_extra == nullptr ||
!root_extra->amalgamation ||
*root_extra->amalgamation != nullptr);
}
inline scope* scope::
parent_scope ()
{
// If this is a root scope and amalgamation is disabled, "jump" straight
// to the global scope.
//
return root () && !amalgamatable () ? &global_scope () : parent_;
}
inline const scope* scope::
parent_scope () const
{
return root () && !amalgamatable () ? &global_scope () : parent_;
}
inline scope* scope::
root_scope ()
{
return root_;
}
inline const scope* scope::
root_scope () const
{
return root_;
}
inline scope* scope::
strong_scope ()
{
// We naturally assume strong_ is not set for non-amalgamatable projects.
//
return root_ != nullptr
? root_->strong_ != nullptr ? root_->strong_ : root_
: nullptr;
}
inline const scope* scope::
strong_scope () const
{
return root_ != nullptr
? root_->strong_ != nullptr ? root_->strong_ : root_
: nullptr;
}
inline scope* scope::
bundle_scope ()
{
if (auto r = root_)
{
for (auto s (r), a (strong_scope ()); s != a; )
{
s = s->parent_scope ()->root_scope ();
if (s->root_extra != nullptr &&
s->root_extra->project &&
*s->root_extra->project != nullptr &&
!(*s->root_extra->project)->empty ())
r = s; // Last named.
}
return r;
}
return nullptr;
}
inline const scope* scope::
bundle_scope () const
{
if (const auto* r = root_)
{
for (auto s (r), a (strong_scope ()); s != a; )
{
s = s->parent_scope ()->root_scope ();
if (s->root_extra != nullptr &&
s->root_extra->project &&
*s->root_extra->project != nullptr &&
!(*s->root_extra->project)->empty ())
r = s; // Last named.
}
return r;
}
return nullptr;
}
inline scope* scope::
weak_scope ()
{
scope* r (root_);
if (r != nullptr)
for (;
r->amalgamatable () && r->parent_->root_ != nullptr;
r = r->parent_->root_) ;
return r;
}
inline const scope* scope::
weak_scope () const
{
const scope* r (root_);
if (r != nullptr)
for (;
r->amalgamatable () && r->parent_->root_ != nullptr;
r = r->parent_->root_) ;
return r;
}
inline bool scope::
sub_root (const scope& r) const
{
// Scan the parent root scope chain looking for this scope.
//
for (const scope* pr (&r);
pr->amalgamatable () && (pr = pr->parent_->root_) != nullptr; )
{
if (pr == this)
return true;
}
return false;
}
inline target_key scope::
find_target_key (name& n, name& o, const location& loc) const
{
auto p (find_target_type (n, o, loc));
return target_key {
&p.first,
&n.dir,
o.dir.empty () ? &empty_dir_path : &o.dir,
&n.value,
move (p.second)};
}
inline prerequisite_key scope::
find_prerequisite_key (name& n, name& o,
const location& loc,
const target_type* tt) const
{
auto p (find_prerequisite_type (n, o, loc, tt));
return prerequisite_key {
n.proj,
{
&p.first,
&n.dir,
o.dir.empty () ? &empty_dir_path : &o.dir,
&n.value,
move (p.second)
},
this};
}
template <typename T>
inline void scope::
insert_rule (meta_operation_id mid, operation_id oid,
string name,
const rule& r)
{
if (mid != 0)
rules.insert<T> (mid, oid, move (name), r);
else
{
auto& ms (root_scope ()->root_extra->meta_operations);
for (size_t i (1), n (ms.size ()); i != n; ++i)
{
if (ms[i] != nullptr)
{
// Skip a few well-known meta-operations that cannot possibly
// trigger a rule match.
//
mid = static_cast<meta_operation_id> (i);
if (mid != noop_id &&
mid != info_id &&
mid != create_id &&
mid != disfigure_id)
rules.insert<T> (mid, oid, name, r);
}
}
}
}
inline dir_path
src_out (const dir_path& out, const scope& r)
{
assert (r.root ());
return src_out (out, r.out_path (), r.src_path ());
}
inline dir_path
out_src (const dir_path& src, const scope& r)
{
assert (r.root ());
return out_src (src, r.out_path (), r.src_path ());
}
inline dir_path
src_out (const dir_path& o,
const dir_path& out_root, const dir_path& src_root)
{
assert (o.sub (out_root));
return src_root / o.leaf (out_root);
}
inline dir_path
out_src (const dir_path& s,
const dir_path& out_root, const dir_path& src_root)
{
assert (s.sub (src_root));
return out_root / s.leaf (src_root);
}
inline const project_name&
project (const scope& rs)
{
assert (rs.root_extra != nullptr && rs.root_extra->project);
return *rs.root_extra->project != nullptr
? **rs.root_extra->project
: empty_project_name;
}
inline const project_name&
named_project (const scope& rs)
{
for (auto r (&rs), a (rs.strong_scope ());
;
r = r->parent_scope ()->root_scope ())
{
const project_name& n (project (*r));
if (!n.empty ())
return n;
if (r == a)
break;
}
return empty_project_name;
}
}
|
