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
|
//! This module contains the implementation details of the HIR for ADTs, i.e.
//! structs and enums (and unions).
use std::sync::Arc;
use ra_arena::{RawId, Arena, impl_arena_id};
use ra_syntax::{
TreeArc,
ast::{self, NameOwner, StructKind, TypeAscriptionOwner}
};
use crate::{
Name, AsName, Struct, Union, Enum, EnumVariant, Crate, AstDatabase,
HirDatabase, HirFileId, StructField, FieldSource, Source, HasSource,
type_ref::TypeRef, DefDatabase,
};
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum AdtDef {
Struct(Struct),
Union(Union),
Enum(Enum),
}
impl_froms!(AdtDef: Struct, Union, Enum);
impl AdtDef {
pub(crate) fn krate(self, db: &impl HirDatabase) -> Option<Crate> {
match self {
AdtDef::Struct(s) => s.module(db),
AdtDef::Union(s) => s.module(db),
AdtDef::Enum(e) => e.module(db),
}
.krate(db)
}
}
impl Struct {
pub(crate) fn variant_data(&self, db: &impl DefDatabase) -> Arc<VariantData> {
db.struct_data(*self).variant_data.clone()
}
}
/// Note that we use `StructData` for unions as well!
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StructData {
pub(crate) name: Option<Name>,
pub(crate) variant_data: Arc<VariantData>,
}
impl StructData {
fn new(struct_def: &ast::StructDef) -> StructData {
let name = struct_def.name().map(|n| n.as_name());
let variant_data = VariantData::new(struct_def.kind());
let variant_data = Arc::new(variant_data);
StructData { name, variant_data }
}
pub(crate) fn struct_data_query(
db: &(impl DefDatabase + AstDatabase),
struct_: Struct,
) -> Arc<StructData> {
let src = struct_.source(db);
Arc::new(StructData::new(&*src.ast))
}
}
fn variants(enum_def: &ast::EnumDef) -> impl Iterator<Item = &ast::EnumVariant> {
enum_def.variant_list().into_iter().flat_map(|it| it.variants())
}
impl EnumVariant {
pub(crate) fn source_impl(
&self,
db: &(impl DefDatabase + AstDatabase),
) -> Source<TreeArc<ast::EnumVariant>> {
let src = self.parent.source(db);
let ast = variants(&*src.ast)
.zip(db.enum_data(self.parent).variants.iter())
.find(|(_syntax, (id, _))| *id == self.id)
.unwrap()
.0
.to_owned();
Source { file_id: src.file_id, ast }
}
pub(crate) fn variant_data(&self, db: &impl DefDatabase) -> Arc<VariantData> {
db.enum_data(self.parent).variants[self.id].variant_data.clone()
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct EnumData {
pub(crate) name: Option<Name>,
pub(crate) variants: Arena<EnumVariantId, EnumVariantData>,
}
impl EnumData {
pub(crate) fn enum_data_query(db: &(impl DefDatabase + AstDatabase), e: Enum) -> Arc<EnumData> {
let src = e.source(db);
let name = src.ast.name().map(|n| n.as_name());
let variants = variants(&*src.ast)
.map(|var| EnumVariantData {
name: var.name().map(|it| it.as_name()),
variant_data: Arc::new(VariantData::new(var.kind())),
})
.collect();
Arc::new(EnumData { name, variants })
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub(crate) struct EnumVariantId(RawId);
impl_arena_id!(EnumVariantId);
#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) struct EnumVariantData {
pub(crate) name: Option<Name>,
variant_data: Arc<VariantData>,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub(crate) struct StructFieldId(RawId);
impl_arena_id!(StructFieldId);
/// A single field of an enum variant or struct
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StructFieldData {
pub(crate) name: Name,
pub(crate) type_ref: TypeRef,
}
/// Fields of an enum variant or struct
#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) struct VariantData(VariantDataInner);
#[derive(Debug, Clone, PartialEq, Eq)]
enum VariantDataInner {
Struct(Arena<StructFieldId, StructFieldData>),
Tuple(Arena<StructFieldId, StructFieldData>),
Unit,
}
impl VariantData {
pub(crate) fn fields(&self) -> Option<&Arena<StructFieldId, StructFieldData>> {
match &self.0 {
VariantDataInner::Struct(fields) | VariantDataInner::Tuple(fields) => Some(fields),
_ => None,
}
}
}
impl VariantData {
fn new(flavor: StructKind) -> Self {
let inner = match flavor {
ast::StructKind::Tuple(fl) => {
let fields = fl
.fields()
.enumerate()
.map(|(i, fd)| StructFieldData {
name: Name::tuple_field_name(i),
type_ref: TypeRef::from_ast_opt(fd.type_ref()),
})
.collect();
VariantDataInner::Tuple(fields)
}
ast::StructKind::Named(fl) => {
let fields = fl
.fields()
.map(|fd| StructFieldData {
name: fd.name().map(|n| n.as_name()).unwrap_or_else(Name::missing),
type_ref: TypeRef::from_ast_opt(fd.ascribed_type()),
})
.collect();
VariantDataInner::Struct(fields)
}
ast::StructKind::Unit => VariantDataInner::Unit,
};
VariantData(inner)
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum VariantDef {
Struct(Struct),
EnumVariant(EnumVariant),
}
impl_froms!(VariantDef: Struct, EnumVariant);
impl VariantDef {
pub(crate) fn field(self, db: &impl HirDatabase, name: &Name) -> Option<StructField> {
match self {
VariantDef::Struct(it) => it.field(db, name),
VariantDef::EnumVariant(it) => it.field(db, name),
}
}
pub(crate) fn variant_data(self, db: &impl DefDatabase) -> Arc<VariantData> {
match self {
VariantDef::Struct(it) => it.variant_data(db),
VariantDef::EnumVariant(it) => it.variant_data(db),
}
}
}
impl StructField {
pub(crate) fn source_impl(
&self,
db: &(impl DefDatabase + AstDatabase),
) -> (HirFileId, FieldSource) {
let var_data = self.parent.variant_data(db);
let fields = var_data.fields().unwrap();
let ss;
let es;
let (file_id, struct_kind) = match self.parent {
VariantDef::Struct(s) => {
ss = s.source(db);
(ss.file_id, ss.ast.kind())
}
VariantDef::EnumVariant(e) => {
es = e.source(db);
(es.file_id, es.ast.kind())
}
};
let field_sources = match struct_kind {
ast::StructKind::Tuple(fl) => {
fl.fields().map(|it| FieldSource::Pos(it.to_owned())).collect()
}
ast::StructKind::Named(fl) => {
fl.fields().map(|it| FieldSource::Named(it.to_owned())).collect()
}
ast::StructKind::Unit => Vec::new(),
};
let field = field_sources
.into_iter()
.zip(fields.iter())
.find(|(_syntax, (id, _))| *id == self.id)
.unwrap()
.0;
(file_id, field)
}
}
|