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-rw-r--r--crates/ra_hir/src/code_model/attrs.rs92
1 files changed, 92 insertions, 0 deletions
diff --git a/crates/ra_hir/src/code_model/attrs.rs b/crates/ra_hir/src/code_model/attrs.rs
new file mode 100644
index 000000000..f7db36b66
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+++ b/crates/ra_hir/src/code_model/attrs.rs
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1//! FIXME: write short doc here
2
3use crate::{
4 db::{AstDatabase, DefDatabase, HirDatabase},
5 Adt, Const, Enum, EnumVariant, FieldSource, Function, HasSource, MacroDef, Module, Static,
6 Struct, StructField, Trait, TypeAlias, Union,
7};
8use hir_def::attr::Attr;
9use hir_expand::hygiene::Hygiene;
10use ra_syntax::ast;
11use std::sync::Arc;
12
13#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
14pub enum AttrDef {
15 Module(Module),
16 StructField(StructField),
17 Adt(Adt),
18 Function(Function),
19 EnumVariant(EnumVariant),
20 Static(Static),
21 Const(Const),
22 Trait(Trait),
23 TypeAlias(TypeAlias),
24 MacroDef(MacroDef),
25}
26
27impl_froms!(
28 AttrDef: Module,
29 StructField,
30 Adt(Struct, Enum, Union),
31 EnumVariant,
32 Static,
33 Const,
34 Function,
35 Trait,
36 TypeAlias,
37 MacroDef
38);
39
40pub trait Attrs {
41 fn attrs(&self, db: &impl HirDatabase) -> Option<Arc<[Attr]>>;
42}
43
44pub(crate) fn attributes_query(
45 db: &(impl DefDatabase + AstDatabase),
46 def: AttrDef,
47) -> Option<Arc<[Attr]>> {
48 match def {
49 AttrDef::Module(it) => {
50 let src = it.declaration_source(db)?;
51 let hygiene = Hygiene::new(db, src.file_id);
52 Attr::from_attrs_owner(&src.ast, &hygiene)
53 }
54 AttrDef::StructField(it) => match it.source(db).ast {
55 FieldSource::Named(named) => {
56 let src = it.source(db);
57 let hygiene = Hygiene::new(db, src.file_id);
58 Attr::from_attrs_owner(&named, &hygiene)
59 }
60 FieldSource::Pos(..) => None,
61 },
62 AttrDef::Adt(it) => match it {
63 Adt::Struct(it) => attrs_from_ast(it, db),
64 Adt::Enum(it) => attrs_from_ast(it, db),
65 Adt::Union(it) => attrs_from_ast(it, db),
66 },
67 AttrDef::EnumVariant(it) => attrs_from_ast(it, db),
68 AttrDef::Static(it) => attrs_from_ast(it, db),
69 AttrDef::Const(it) => attrs_from_ast(it, db),
70 AttrDef::Function(it) => attrs_from_ast(it, db),
71 AttrDef::Trait(it) => attrs_from_ast(it, db),
72 AttrDef::TypeAlias(it) => attrs_from_ast(it, db),
73 AttrDef::MacroDef(it) => attrs_from_ast(it, db),
74 }
75}
76
77fn attrs_from_ast<T, D>(node: T, db: &D) -> Option<Arc<[Attr]>>
78where
79 T: HasSource,
80 T::Ast: ast::AttrsOwner,
81 D: DefDatabase + AstDatabase,
82{
83 let src = node.source(db);
84 let hygiene = Hygiene::new(db, src.file_id);
85 Attr::from_attrs_owner(&src.ast, &hygiene)
86}
87
88impl<T: Into<AttrDef> + Copy> Attrs for T {
89 fn attrs(&self, db: &impl HirDatabase) -> Option<Arc<[Attr]>> {
90 db.attrs((*self).into())
91 }
92}