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
|
//! FIXME: write short doc here
use hir_def::{ModuleId, StructId, StructOrUnionId, UnionId};
use hir_expand::name::AsName;
use ra_syntax::{
ast::{self, AstNode, NameOwner},
match_ast,
};
use crate::{
db::{AstDatabase, DefDatabase, HirDatabase},
ids::{AstItemDef, LocationCtx},
Const, DefWithBody, Enum, EnumVariant, FieldSource, Function, HasBody, HasSource, ImplBlock,
Local, Module, ModuleSource, Source, Static, Struct, StructField, Trait, TypeAlias, Union,
VariantDef,
};
pub trait FromSource: Sized {
type Ast;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self>;
}
// FIXIME: these two impls are wrong, `ast::StructDef` might produce either a struct or a union
impl FromSource for Struct {
type Ast = ast::StructDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id: StructOrUnionId = from_source(db, src)?;
Some(Struct { id: StructId(id) })
}
}
impl FromSource for Union {
type Ast = ast::StructDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id: StructOrUnionId = from_source(db, src)?;
Some(Union { id: UnionId(id) })
}
}
impl FromSource for Enum {
type Ast = ast::EnumDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(Enum { id })
}
}
impl FromSource for Trait {
type Ast = ast::TraitDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(Trait { id })
}
}
impl FromSource for Function {
type Ast = ast::FnDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(Function { id })
}
}
impl FromSource for Const {
type Ast = ast::ConstDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(Const { id })
}
}
impl FromSource for Static {
type Ast = ast::StaticDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(Static { id })
}
}
impl FromSource for TypeAlias {
type Ast = ast::TypeAliasDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(TypeAlias { id })
}
}
// FIXME: add impl FromSource for MacroDef
impl FromSource for ImplBlock {
type Ast = ast::ImplBlock;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let id = from_source(db, src)?;
Some(ImplBlock { id })
}
}
impl FromSource for EnumVariant {
type Ast = ast::EnumVariant;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let parent_enum = src.ast.parent_enum();
let src_enum = Source { file_id: src.file_id, ast: parent_enum };
let variants = Enum::from_source(db, src_enum)?.variants(db);
variants.into_iter().find(|v| v.source(db) == src)
}
}
impl FromSource for StructField {
type Ast = FieldSource;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: Source<Self::Ast>) -> Option<Self> {
let variant_def: VariantDef = match src.ast {
FieldSource::Named(ref field) => {
let ast = field.syntax().ancestors().find_map(ast::StructDef::cast)?;
let src = Source { file_id: src.file_id, ast };
let def = Struct::from_source(db, src)?;
VariantDef::from(def)
}
FieldSource::Pos(ref field) => {
let ast = field.syntax().ancestors().find_map(ast::EnumVariant::cast)?;
let src = Source { file_id: src.file_id, ast };
let def = EnumVariant::from_source(db, src)?;
VariantDef::from(def)
}
};
variant_def
.variant_data(db)
.fields()
.into_iter()
.flat_map(|it| it.iter())
.map(|(id, _)| StructField { parent: variant_def, id })
.find(|f| f.source(db) == src)
}
}
impl Local {
pub fn from_source(db: &impl HirDatabase, src: Source<ast::BindPat>) -> Option<Self> {
let file_id = src.file_id;
let parent: DefWithBody = src.ast.syntax().ancestors().find_map(|it| {
let res = match_ast! {
match it {
ast::ConstDef(ast) => { Const::from_source(db, Source { ast, file_id})?.into() },
ast::StaticDef(ast) => { Static::from_source(db, Source { ast, file_id})?.into() },
ast::FnDef(ast) => { Function::from_source(db, Source { ast, file_id})?.into() },
_ => return None,
}
};
Some(res)
})?;
let source_map = parent.body_source_map(db);
let src = src.map(ast::Pat::from);
let pat_id = source_map.node_pat(src.as_ref())?;
Some(Local { parent, pat_id })
}
}
impl Module {
pub fn from_declaration(db: &impl DefDatabase, src: Source<ast::Module>) -> Option<Self> {
let parent_declaration = src.ast.syntax().ancestors().skip(1).find_map(ast::Module::cast);
let parent_module = match parent_declaration {
Some(parent_declaration) => {
let src_parent = Source { file_id: src.file_id, ast: parent_declaration };
Module::from_declaration(db, src_parent)
}
_ => {
let src_parent = Source {
file_id: src.file_id,
ast: ModuleSource::new(db, Some(src.file_id.original_file(db)), None),
};
Module::from_definition(db, src_parent)
}
}?;
let child_name = src.ast.name()?;
parent_module.child(db, &child_name.as_name())
}
pub fn from_definition(db: &impl DefDatabase, src: Source<ModuleSource>) -> Option<Self> {
match src.ast {
ModuleSource::Module(ref module) => {
assert!(!module.has_semi());
return Module::from_declaration(
db,
Source { file_id: src.file_id, ast: module.clone() },
);
}
ModuleSource::SourceFile(_) => (),
};
let original_file = src.file_id.original_file(db);
let (krate, module_id) =
db.relevant_crates(original_file).iter().find_map(|&crate_id| {
let crate_def_map = db.crate_def_map(crate_id);
let local_module_id = crate_def_map.modules_for_file(original_file).next()?;
Some((crate_id, local_module_id))
})?;
Some(Module { id: ModuleId { krate, module_id } })
}
}
fn from_source<N, DEF>(db: &(impl DefDatabase + AstDatabase), src: Source<N>) -> Option<DEF>
where
N: AstNode,
DEF: AstItemDef<N>,
{
let module_src = ModuleSource::from_child_node(db, src.as_ref().map(|it| it.syntax()));
let module = Module::from_definition(db, Source::new(src.file_id, module_src))?;
let ctx = LocationCtx::new(db, module.id, src.file_id);
Some(DEF::from_ast(ctx, &src.ast))
}
|
