aboutsummaryrefslogtreecommitdiff
path: root/crates/hir_def/src/data.rs
blob: 31f994681960a893fc0a3759532937e9e4960696 (plain)
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
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
//! Contains basic data about various HIR declarations.

use std::sync::Arc;

use hir_expand::{name::Name, InFile};
use syntax::ast;

use crate::{
    attr::Attrs,
    body::Expander,
    db::DefDatabase,
    intern::Interned,
    item_tree::{AssocItem, FunctionQualifier, ItemTreeId, ModItem, Param},
    type_ref::{TraitRef, TypeBound, TypeRef},
    visibility::RawVisibility,
    AssocContainerId, AssocItemId, ConstId, ConstLoc, FunctionId, FunctionLoc, HasModule, ImplId,
    Intern, Lookup, ModuleId, StaticId, TraitId, TypeAliasId, TypeAliasLoc,
};

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct FunctionData {
    pub name: Name,
    pub params: Vec<Interned<TypeRef>>,
    pub ret_type: Interned<TypeRef>,
    pub attrs: Attrs,
    /// True if the first param is `self`. This is relevant to decide whether this
    /// can be called as a method.
    pub has_self_param: bool,
    pub has_body: bool,
    pub qualifier: FunctionQualifier,
    pub is_in_extern_block: bool,
    pub is_varargs: bool,
    pub visibility: RawVisibility,
}

impl FunctionData {
    pub(crate) fn fn_data_query(db: &dyn DefDatabase, func: FunctionId) -> Arc<FunctionData> {
        let loc = func.lookup(db);
        let krate = loc.container.module(db).krate;
        let crate_graph = db.crate_graph();
        let cfg_options = &crate_graph[krate].cfg_options;
        let item_tree = loc.id.item_tree(db);
        let func = &item_tree[loc.id.value];

        let enabled_params = func
            .params
            .clone()
            .filter(|&param| item_tree.attrs(db, krate, param.into()).is_cfg_enabled(cfg_options));

        // If last cfg-enabled param is a `...` param, it's a varargs function.
        let is_varargs = enabled_params
            .clone()
            .next_back()
            .map_or(false, |param| matches!(item_tree[param], Param::Varargs));

        Arc::new(FunctionData {
            name: func.name.clone(),
            params: enabled_params
                .clone()
                .filter_map(|id| match &item_tree[id] {
                    Param::Normal(ty) => Some(ty.clone()),
                    Param::Varargs => None,
                })
                .collect(),
            ret_type: func.ret_type.clone(),
            attrs: item_tree.attrs(db, krate, ModItem::from(loc.id.value).into()),
            has_self_param: func.has_self_param,
            has_body: func.has_body,
            qualifier: func.qualifier.clone(),
            is_in_extern_block: func.is_in_extern_block,
            is_varargs,
            visibility: item_tree[func.visibility].clone(),
        })
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TypeAliasData {
    pub name: Name,
    pub type_ref: Option<Interned<TypeRef>>,
    pub visibility: RawVisibility,
    pub is_extern: bool,
    /// Bounds restricting the type alias itself (eg. `type Ty: Bound;` in a trait or impl).
    pub bounds: Vec<TypeBound>,
}

impl TypeAliasData {
    pub(crate) fn type_alias_data_query(
        db: &dyn DefDatabase,
        typ: TypeAliasId,
    ) -> Arc<TypeAliasData> {
        let loc = typ.lookup(db);
        let item_tree = loc.id.item_tree(db);
        let typ = &item_tree[loc.id.value];

        Arc::new(TypeAliasData {
            name: typ.name.clone(),
            type_ref: typ.type_ref.clone(),
            visibility: item_tree[typ.visibility].clone(),
            is_extern: typ.is_extern,
            bounds: typ.bounds.to_vec(),
        })
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TraitData {
    pub name: Name,
    pub items: Vec<(Name, AssocItemId)>,
    pub is_auto: bool,
    pub is_unsafe: bool,
    pub visibility: RawVisibility,
    pub bounds: Box<[TypeBound]>,
}

impl TraitData {
    pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
        let tr_loc = tr.lookup(db);
        let item_tree = tr_loc.id.item_tree(db);
        let tr_def = &item_tree[tr_loc.id.value];
        let name = tr_def.name.clone();
        let is_auto = tr_def.is_auto;
        let is_unsafe = tr_def.is_unsafe;
        let module_id = tr_loc.container;
        let container = AssocContainerId::TraitId(tr);
        let visibility = item_tree[tr_def.visibility].clone();
        let bounds = tr_def.bounds.clone();
        let mut expander = Expander::new(db, tr_loc.id.file_id(), module_id);

        let items = collect_items(
            db,
            module_id,
            &mut expander,
            tr_def.items.iter().copied(),
            tr_loc.id.file_id(),
            container,
            100,
        );

        Arc::new(TraitData { name, items, is_auto, is_unsafe, visibility, bounds })
    }

    pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
        self.items.iter().filter_map(|(_name, item)| match item {
            AssocItemId::TypeAliasId(t) => Some(*t),
            _ => None,
        })
    }

    pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
        self.items.iter().find_map(|(item_name, item)| match item {
            AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
            _ => None,
        })
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ImplData {
    pub target_trait: Option<Interned<TraitRef>>,
    pub self_ty: Interned<TypeRef>,
    pub items: Vec<AssocItemId>,
    pub is_negative: bool,
}

impl ImplData {
    pub(crate) fn impl_data_query(db: &dyn DefDatabase, id: ImplId) -> Arc<ImplData> {
        let _p = profile::span("impl_data_query");
        let impl_loc = id.lookup(db);

        let item_tree = impl_loc.id.item_tree(db);
        let impl_def = &item_tree[impl_loc.id.value];
        let target_trait = impl_def.target_trait.clone();
        let self_ty = impl_def.self_ty.clone();
        let is_negative = impl_def.is_negative;
        let module_id = impl_loc.container;
        let container = AssocContainerId::ImplId(id);
        let mut expander = Expander::new(db, impl_loc.id.file_id(), module_id);

        let items = collect_items(
            db,
            module_id,
            &mut expander,
            impl_def.items.iter().copied(),
            impl_loc.id.file_id(),
            container,
            100,
        );
        let items = items.into_iter().map(|(_, item)| item).collect();

        Arc::new(ImplData { target_trait, self_ty, items, is_negative })
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ConstData {
    /// const _: () = ();
    pub name: Option<Name>,
    pub type_ref: Interned<TypeRef>,
    pub visibility: RawVisibility,
}

impl ConstData {
    pub(crate) fn const_data_query(db: &dyn DefDatabase, konst: ConstId) -> Arc<ConstData> {
        let loc = konst.lookup(db);
        let item_tree = loc.id.item_tree(db);
        let konst = &item_tree[loc.id.value];

        Arc::new(ConstData {
            name: konst.name.clone(),
            type_ref: konst.type_ref.clone(),
            visibility: item_tree[konst.visibility].clone(),
        })
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StaticData {
    pub name: Option<Name>,
    pub type_ref: Interned<TypeRef>,
    pub visibility: RawVisibility,
    pub mutable: bool,
    pub is_extern: bool,
}

impl StaticData {
    pub(crate) fn static_data_query(db: &dyn DefDatabase, konst: StaticId) -> Arc<StaticData> {
        let node = konst.lookup(db);
        let item_tree = node.id.item_tree(db);
        let statik = &item_tree[node.id.value];

        Arc::new(StaticData {
            name: Some(statik.name.clone()),
            type_ref: statik.type_ref.clone(),
            visibility: item_tree[statik.visibility].clone(),
            mutable: statik.mutable,
            is_extern: statik.is_extern,
        })
    }
}

fn collect_items(
    db: &dyn DefDatabase,
    module: ModuleId,
    expander: &mut Expander,
    assoc_items: impl Iterator<Item = AssocItem>,
    file_id: crate::HirFileId,
    container: AssocContainerId,
    limit: usize,
) -> Vec<(Name, AssocItemId)> {
    if limit == 0 {
        return Vec::new();
    }

    let item_tree = db.file_item_tree(file_id);
    let crate_graph = db.crate_graph();
    let cfg_options = &crate_graph[module.krate].cfg_options;

    let mut items = Vec::new();
    for item in assoc_items {
        let attrs = item_tree.attrs(db, module.krate, ModItem::from(item).into());
        if !attrs.is_cfg_enabled(cfg_options) {
            continue;
        }

        match item {
            AssocItem::Function(id) => {
                let item = &item_tree[id];
                let def = FunctionLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
                items.push((item.name.clone(), def.into()));
            }
            AssocItem::Const(id) => {
                let item = &item_tree[id];
                let name = match item.name.clone() {
                    Some(name) => name,
                    None => continue,
                };
                let def = ConstLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
                items.push((name, def.into()));
            }
            AssocItem::TypeAlias(id) => {
                let item = &item_tree[id];
                let def = TypeAliasLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
                items.push((item.name.clone(), def.into()));
            }
            AssocItem::MacroCall(call) => {
                let call = &item_tree[call];
                let ast_id_map = db.ast_id_map(file_id);
                let root = db.parse_or_expand(file_id).unwrap();
                let call = ast_id_map.get(call.ast_id).to_node(&root);
                let res = expander.enter_expand(db, call);

                if let Ok(res) = res {
                    if let Some((mark, mac)) = res.value {
                        let src: InFile<ast::MacroItems> = expander.to_source(mac);
                        let item_tree = db.file_item_tree(src.file_id);
                        let iter =
                            item_tree.top_level_items().iter().filter_map(ModItem::as_assoc_item);
                        items.extend(collect_items(
                            db,
                            module,
                            expander,
                            iter,
                            src.file_id,
                            container,
                            limit - 1,
                        ));

                        expander.exit(db, mark);
                    }
                }
            }
        }
    }

    items
}