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
|
use ra_db::{SourceRootId, FileId};
use ra_syntax::{ast, SyntaxNode, AstNode, TreeArc};
use crate::{
Module, ModuleSource, Problem,
Crate, DefId, DefLoc, DefKind, Name, Path, PathKind, PerNs, Def,
module_tree::ModuleId,
nameres::{ModuleScope, lower::ImportId},
db::HirDatabase,
};
impl Module {
pub(crate) fn new(def_id: DefId) -> Self {
crate::code_model_api::Module { def_id }
}
pub(crate) fn from_module_id(
db: &impl HirDatabase,
source_root_id: SourceRootId,
module_id: ModuleId,
) -> Self {
let module_tree = db.module_tree(source_root_id);
let def_loc = DefLoc {
kind: DefKind::Module,
source_root_id,
module_id,
source_item_id: module_id.source(&module_tree),
};
let def_id = def_loc.id(db);
Module::new(def_id)
}
pub(crate) fn name_impl(&self, db: &impl HirDatabase) -> Option<Name> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
let link = loc.module_id.parent_link(&module_tree)?;
Some(link.name(&module_tree).clone())
}
pub(crate) fn definition_source_impl(&self, db: &impl HirDatabase) -> (FileId, ModuleSource) {
let loc = self.def_id.loc(db);
let file_id = loc.source_item_id.file_id.as_original_file();
let syntax_node = db.file_item(loc.source_item_id);
let module_source = if let Some(source_file) = ast::SourceFile::cast(&syntax_node) {
ModuleSource::SourceFile(source_file.to_owned())
} else {
let module = ast::Module::cast(&syntax_node).unwrap();
ModuleSource::Module(module.to_owned())
};
(file_id, module_source)
}
pub(crate) fn declaration_source_impl(
&self,
db: &impl HirDatabase,
) -> Option<(FileId, TreeArc<ast::Module>)> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
let link = loc.module_id.parent_link(&module_tree)?;
let file_id = link
.owner(&module_tree)
.source(&module_tree)
.file_id
.as_original_file();
let src = link.source(&module_tree, db);
Some((file_id, src))
}
pub(crate) fn import_source_impl(
&self,
db: &impl HirDatabase,
import: ImportId,
) -> TreeArc<ast::PathSegment> {
let loc = self.def_id.loc(db);
let source_map = db.lower_module_source_map(loc.source_root_id, loc.module_id);
let (_, source) = self.definition_source(db);
source_map.get(&source, import)
}
pub(crate) fn krate_impl(&self, db: &impl HirDatabase) -> Option<Crate> {
let root = self.crate_root(db);
let loc = root.def_id.loc(db);
let file_id = loc.source_item_id.file_id.as_original_file();
let crate_graph = db.crate_graph();
let crate_id = crate_graph.crate_id_for_crate_root(file_id)?;
Some(Crate::new(crate_id))
}
pub(crate) fn crate_root_impl(&self, db: &impl HirDatabase) -> Module {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
let module_id = loc.module_id.crate_root(&module_tree);
Module::from_module_id(db, loc.source_root_id, module_id)
}
/// Finds a child module with the specified name.
pub(crate) fn child_impl(&self, db: &impl HirDatabase, name: &Name) -> Option<Module> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
let child_id = loc.module_id.child(&module_tree, name)?;
Some(Module::from_module_id(db, loc.source_root_id, child_id))
}
/// Iterates over all child modules.
pub(crate) fn children_impl(&self, db: &impl HirDatabase) -> impl Iterator<Item = Module> {
// FIXME this should be implementable without collecting into a vec, but
// it's kind of hard since the iterator needs to keep a reference to the
// module tree.
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
let children = loc
.module_id
.children(&module_tree)
.map(|(_, module_id)| Module::from_module_id(db, loc.source_root_id, module_id))
.collect::<Vec<_>>();
children.into_iter()
}
pub(crate) fn parent_impl(&self, db: &impl HirDatabase) -> Option<Module> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
let parent_id = loc.module_id.parent(&module_tree)?;
Some(Module::from_module_id(db, loc.source_root_id, parent_id))
}
/// Returns a `ModuleScope`: a set of items, visible in this module.
pub(crate) fn scope_impl(&self, db: &impl HirDatabase) -> ModuleScope {
let loc = self.def_id.loc(db);
let item_map = db.item_map(loc.source_root_id);
item_map.per_module[&loc.module_id].clone()
}
pub(crate) fn resolve_path_impl(&self, db: &impl HirDatabase, path: &Path) -> PerNs<DefId> {
let mut curr_per_ns = PerNs::types(
match path.kind {
PathKind::Crate => self.crate_root(db),
PathKind::Self_ | PathKind::Plain => self.clone(),
PathKind::Super => {
if let Some(p) = self.parent(db) {
p
} else {
return PerNs::none();
}
}
PathKind::Abs => {
// TODO: absolute use is not supported
return PerNs::none();
}
}
.def_id,
);
for segment in path.segments.iter() {
let curr = match curr_per_ns.as_ref().take_types() {
Some(r) => r,
None => {
// we still have path segments left, but the path so far
// didn't resolve in the types namespace => no resolution
// (don't break here because curr_per_ns might contain
// something in the value namespace, and it would be wrong
// to return that)
return PerNs::none();
}
};
// resolve segment in curr
curr_per_ns = match curr.resolve(db) {
Def::Module(m) => {
let scope = m.scope(db);
match scope.get(&segment.name) {
Some(r) => r.def_id,
None => PerNs::none(),
}
}
Def::Enum(e) => {
// enum variant
let matching_variant = e
.variants(db)
.into_iter()
.find(|(n, _variant)| n == &segment.name);
match matching_variant {
Some((_n, variant)) => PerNs::both(variant.def_id(), e.def_id()),
None => PerNs::none(),
}
}
_ => {
// could be an inherent method call in UFCS form
// (`Struct::method`), or some other kind of associated
// item... Which we currently don't handle (TODO)
PerNs::none()
}
};
}
curr_per_ns
}
pub(crate) fn problems_impl(
&self,
db: &impl HirDatabase,
) -> Vec<(TreeArc<SyntaxNode>, Problem)> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id);
loc.module_id.problems(&module_tree, db)
}
}
|
