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
|
//! FIXME: write short doc here
use hir::{Either, FromSource, HasSource};
use ra_db::FileId;
use ra_syntax::{ast, ast::VisibilityOwner, AstNode, AstPtr};
use test_utils::tested_by;
use crate::db::RootDatabase;
pub(crate) struct Declaration {
visibility: Option<ast::Visibility>,
container: hir::ModuleSource,
pub item: NameKind,
}
pub(crate) enum NameKind {
Macro(hir::MacroDef),
FieldAccess(hir::StructField),
AssocItem(hir::AssocItem),
Def(hir::ModuleDef),
SelfType(hir::Ty),
Pat(AstPtr<ast::BindPat>),
SelfParam(AstPtr<ast::SelfParam>),
GenericParam(u32),
}
pub(crate) fn classify_name_ref(
db: &RootDatabase,
analyzer: &hir::SourceAnalyzer,
name_ref: &ast::NameRef,
) -> Option<NameKind> {
use NameKind::*;
// Check if it is a method
if let Some(method_call) = name_ref.syntax().parent().and_then(ast::MethodCallExpr::cast) {
tested_by!(goto_definition_works_for_methods);
if let Some(func) = analyzer.resolve_method_call(&method_call) {
return Some(AssocItem(func.into()));
}
}
// It could be a macro call
if let Some(macro_call) = name_ref
.syntax()
.parent()
.and_then(|node| node.parent())
.and_then(|node| node.parent())
.and_then(ast::MacroCall::cast)
{
tested_by!(goto_definition_works_for_macros);
if let Some(mac) = analyzer.resolve_macro_call(db, ¯o_call) {
return Some(Macro(mac));
}
}
// It could also be a field access
if let Some(field_expr) = name_ref.syntax().parent().and_then(ast::FieldExpr::cast) {
tested_by!(goto_definition_works_for_fields);
if let Some(field) = analyzer.resolve_field(&field_expr) {
return Some(FieldAccess(field));
};
}
// It could also be a named field
if let Some(field_expr) = name_ref.syntax().parent().and_then(ast::RecordField::cast) {
tested_by!(goto_definition_works_for_record_fields);
if let Some(record_lit) = field_expr.syntax().ancestors().find_map(ast::RecordLit::cast) {
let variant_def = analyzer.resolve_record_literal(&record_lit)?;
let hir_path = hir::Path::from_name_ref(name_ref);
let hir_name = hir_path.as_ident()?;
let field = variant_def.field(db, hir_name)?;
return Some(FieldAccess(field));
}
}
// General case, a path or a local:
if let Some(path) = name_ref.syntax().ancestors().find_map(ast::Path::cast) {
if let Some(resolved) = analyzer.resolve_path(db, &path) {
return match resolved {
hir::PathResolution::Def(def) => Some(Def(def)),
hir::PathResolution::LocalBinding(Either::A(pat)) => Some(Pat(pat)),
hir::PathResolution::LocalBinding(Either::B(par)) => Some(SelfParam(par)),
hir::PathResolution::GenericParam(par) => {
// FIXME: get generic param def
Some(GenericParam(par))
}
hir::PathResolution::Macro(def) => Some(Macro(def)),
hir::PathResolution::SelfType(impl_block) => {
let ty = impl_block.target_ty(db);
Some(SelfType(ty))
}
hir::PathResolution::AssocItem(assoc) => Some(AssocItem(assoc)),
};
}
}
None
}
pub(crate) fn classify_name(
db: &RootDatabase,
file_id: FileId,
name: &ast::Name,
) -> Option<Declaration> {
use NameKind::*;
let parent = name.syntax().parent()?;
let file_id = file_id.into();
macro_rules! match_ast {
(match $node:ident {
$( ast::$ast:ident($it:ident) => $res:block, )*
_ => $catch_all:block,
}) => {{
$( if let Some($it) = ast::$ast::cast($node.clone()) $res else )*
$catch_all
}};
}
let container = parent.ancestors().find_map(|n| {
match_ast! {
match n {
ast::Module(it) => { Some(hir::ModuleSource::Module(it)) },
ast::SourceFile(it) => { Some(hir::ModuleSource::SourceFile(it)) },
_ => { None },
}
}
})?;
// FIXME: add ast::MacroCall(it)
let (item, visibility) = match_ast! {
match parent {
ast::BindPat(it) => {
let pat = AstPtr::new(&it);
(Pat(pat), None)
},
ast::RecordFieldDef(it) => {
let src = hir::Source { file_id, ast: hir::FieldSource::Named(it) };
let field = hir::StructField::from_source(db, src)?;
let visibility = match field.parent_def(db) {
hir::VariantDef::Struct(s) => s.source(db).ast.visibility(),
hir::VariantDef::EnumVariant(e) => e.source(db).ast.parent_enum().visibility(),
};
(FieldAccess(field), visibility)
},
ast::FnDef(it) => {
if parent.parent().and_then(ast::ItemList::cast).is_some() {
let src = hir::Source { file_id, ast: ast::ImplItem::from(it.clone()) };
let item = hir::AssocItem::from_source(db, src)?;
(AssocItem(item), it.visibility())
} else {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::Function::from_source(db, src)?;
(Def(def.into()), it.visibility())
}
},
ast::ConstDef(it) => {
if parent.parent().and_then(ast::ItemList::cast).is_some() {
let src = hir::Source { file_id, ast: ast::ImplItem::from(it.clone()) };
let item = hir::AssocItem::from_source(db, src)?;
(AssocItem(item), it.visibility())
} else {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::Const::from_source(db, src)?;
(Def(def.into()), it.visibility())
}
},
ast::TypeAliasDef(it) => {
if parent.parent().and_then(ast::ItemList::cast).is_some() {
let src = hir::Source { file_id, ast: ast::ImplItem::from(it.clone()) };
let item = hir::AssocItem::from_source(db, src)?;
(AssocItem(item), it.visibility())
} else {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::TypeAlias::from_source(db, src)?;
(Def(def.into()), it.visibility())
}
},
ast::Module(it) => {
let src = hir::Source { file_id, ast: hir::ModuleSource::Module(it.clone()) };
let def = hir::Module::from_definition(db, src)?;
(Def(def.into()), it.visibility())
},
ast::StructDef(it) => {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::Struct::from_source(db, src)?;
(Def(def.into()), it.visibility())
},
ast::EnumDef(it) => {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::Enum::from_source(db, src)?;
(Def(def.into()), it.visibility())
},
ast::TraitDef(it) => {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::Trait::from_source(db, src)?;
(Def(def.into()), it.visibility())
},
ast::StaticDef(it) => {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::Static::from_source(db, src)?;
(Def(def.into()), it.visibility())
},
ast::EnumVariant(it) => {
let src = hir::Source { file_id, ast: it.clone() };
let def = hir::EnumVariant::from_source(db, src)?;
(Def(def.into()), it.parent_enum().visibility())
},
_ => {
return None;
},
}
};
Some(Declaration { item, container, visibility })
}
|
