1 //! FIXME: write short doc here
3 child_by_source::ChildBySource, dyn_map::DynMap, keys, keys::Key, nameres::ModuleSource,
4 ConstId, DefWithBodyId, EnumId, EnumVariantId, FunctionId, GenericDefId, ImplId, ModuleId,
5 StaticId, StructId, TraitId, TypeAliasId, UnionId, VariantId,
7 use hir_expand::{name::AsName, AstId, MacroDefId, MacroDefKind};
9 ast::{self, AstNode, NameOwner},
10 match_ast, SyntaxNode,
14 db::{AstDatabase, DefDatabase, HirDatabase},
15 Const, DefWithBody, Enum, EnumVariant, FieldSource, Function, ImplBlock, InFile, Local,
16 MacroDef, Module, Static, Struct, StructField, Trait, TypeAlias, TypeParam, Union,
19 pub trait FromSource: Sized {
21 fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self>;
24 pub trait FromSourceByContainer: Sized {
25 type Ast: AstNode + 'static;
26 type Id: Copy + 'static;
27 const KEY: Key<Self::Ast, Self::Id>;
30 impl<T: FromSourceByContainer> FromSource for T
32 T: From<<T as FromSourceByContainer>::Id>,
34 type Ast = <T as FromSourceByContainer>::Ast;
35 fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
36 analyze_container(db, src.as_ref().map(|it| it.syntax()))[T::KEY]
43 macro_rules! from_source_by_container_impls {
44 ($(($hir:ident, $id:ident, $ast:path, $key:path)),* ,) => {$(
45 impl FromSourceByContainer for $hir {
48 const KEY: Key<Self::Ast, Self::Id> = $key;
53 from_source_by_container_impls![
54 (Struct, StructId, ast::StructDef, keys::STRUCT),
55 (Union, UnionId, ast::UnionDef, keys::UNION),
56 (Enum, EnumId, ast::EnumDef, keys::ENUM),
57 (Trait, TraitId, ast::TraitDef, keys::TRAIT),
58 (Function, FunctionId, ast::FnDef, keys::FUNCTION),
59 (Static, StaticId, ast::StaticDef, keys::STATIC),
60 (Const, ConstId, ast::ConstDef, keys::CONST),
61 (TypeAlias, TypeAliasId, ast::TypeAliasDef, keys::TYPE_ALIAS),
62 (ImplBlock, ImplId, ast::ImplBlock, keys::IMPL),
65 impl FromSource for MacroDef {
66 type Ast = ast::MacroCall;
67 fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
68 let kind = MacroDefKind::Declarative;
70 let module_src = ModuleSource::from_child_node(db, src.as_ref().map(|it| it.syntax()));
71 let module = Module::from_definition(db, InFile::new(src.file_id, module_src))?;
72 let krate = Some(module.krate().id);
74 let ast_id = Some(AstId::new(src.file_id, db.ast_id_map(src.file_id).ast_id(&src.value)));
76 let id: MacroDefId = MacroDefId { krate, ast_id, kind };
81 impl FromSource for EnumVariant {
82 type Ast = ast::EnumVariant;
83 fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
84 let parent_enum = src.value.parent_enum();
85 let src_enum = InFile { file_id: src.file_id, value: parent_enum };
86 let parent_enum = Enum::from_source(db, src_enum)?;
87 parent_enum.id.child_by_source(db)[keys::ENUM_VARIANT]
90 .map(EnumVariant::from)
94 impl FromSource for StructField {
95 type Ast = FieldSource;
96 fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
97 let src = src.as_ref();
99 // FIXME this is buggy
100 let variant_id: VariantId = match src.value {
101 FieldSource::Named(field) => {
102 let value = field.syntax().ancestors().find_map(ast::StructDef::cast)?;
103 let src = InFile { file_id: src.file_id, value };
104 let def = Struct::from_source(db, src)?;
107 FieldSource::Pos(field) => {
108 let value = field.syntax().ancestors().find_map(ast::EnumVariant::cast)?;
109 let src = InFile { file_id: src.file_id, value };
110 let def = EnumVariant::from_source(db, src)?;
111 EnumVariantId::from(def).into()
115 let dyn_map = variant_id.child_by_source(db);
117 FieldSource::Pos(it) => dyn_map[keys::TUPLE_FIELD].get(&src.with_value(it.clone())),
118 FieldSource::Named(it) => dyn_map[keys::RECORD_FIELD].get(&src.with_value(it.clone())),
121 .map(StructField::from)
126 pub fn from_source(db: &impl HirDatabase, src: InFile<ast::BindPat>) -> Option<Self> {
127 let file_id = src.file_id;
128 let parent: DefWithBody = src.value.syntax().ancestors().find_map(|it| {
129 let res = match_ast! {
131 ast::ConstDef(value) => { Const::from_source(db, InFile { value, file_id})?.into() },
132 ast::StaticDef(value) => { Static::from_source(db, InFile { value, file_id})?.into() },
133 ast::FnDef(value) => { Function::from_source(db, InFile { value, file_id})?.into() },
139 let (_body, source_map) = db.body_with_source_map(parent.into());
140 let src = src.map(ast::Pat::from);
141 let pat_id = source_map.node_pat(src.as_ref())?;
142 Some(Local { parent, pat_id })
147 pub fn from_source(db: &impl HirDatabase, src: InFile<ast::TypeParam>) -> Option<Self> {
148 let file_id = src.file_id;
149 let parent: GenericDefId = src.value.syntax().ancestors().find_map(|it| {
150 let res = match_ast! {
152 ast::FnDef(value) => { Function::from_source(db, InFile { value, file_id})?.id.into() },
153 ast::StructDef(value) => { Struct::from_source(db, InFile { value, file_id})?.id.into() },
154 ast::EnumDef(value) => { Enum::from_source(db, InFile { value, file_id})?.id.into() },
155 ast::TraitDef(value) => { Trait::from_source(db, InFile { value, file_id})?.id.into() },
156 ast::TypeAliasDef(value) => { TypeAlias::from_source(db, InFile { value, file_id})?.id.into() },
157 ast::ImplBlock(value) => { ImplBlock::from_source(db, InFile { value, file_id})?.id.into() },
163 let &id = parent.child_by_source(db)[keys::TYPE_PARAM].get(&src)?;
164 Some(TypeParam { id })
169 pub fn from_declaration(db: &impl DefDatabase, src: InFile<ast::Module>) -> Option<Self> {
170 let parent_declaration = src.value.syntax().ancestors().skip(1).find_map(ast::Module::cast);
172 let parent_module = match parent_declaration {
173 Some(parent_declaration) => {
174 let src_parent = InFile { file_id: src.file_id, value: parent_declaration };
175 Module::from_declaration(db, src_parent)
178 let source_file = db.parse(src.file_id.original_file(db)).tree();
180 InFile { file_id: src.file_id, value: ModuleSource::SourceFile(source_file) };
181 Module::from_definition(db, src_parent)
185 let child_name = src.value.name()?.as_name();
186 let def_map = db.crate_def_map(parent_module.id.krate);
187 let child_id = def_map[parent_module.id.local_id].children.get(&child_name)?;
188 Some(parent_module.with_module_id(*child_id))
191 pub fn from_definition(db: &impl DefDatabase, src: InFile<ModuleSource>) -> Option<Self> {
193 ModuleSource::Module(ref module) => {
194 assert!(!module.has_semi());
195 return Module::from_declaration(
197 InFile { file_id: src.file_id, value: module.clone() },
200 ModuleSource::SourceFile(_) => (),
203 let original_file = src.file_id.original_file(db);
205 let (krate, local_id) = db.relevant_crates(original_file).iter().find_map(|&crate_id| {
206 let crate_def_map = db.crate_def_map(crate_id);
207 let local_id = crate_def_map.modules_for_file(original_file).next()?;
208 Some((crate_id, local_id))
210 Some(Module { id: ModuleId { krate, local_id } })
214 fn analyze_container(db: &impl DefDatabase, src: InFile<&SyntaxNode>) -> DynMap {
215 _analyze_container(db, src).unwrap_or_default()
218 fn _analyze_container(db: &impl DefDatabase, src: InFile<&SyntaxNode>) -> Option<DynMap> {
219 // FIXME: this doesn't try to handle nested declarations
220 for container in src.value.ancestors().skip(1) {
221 let res = match_ast! {
223 ast::TraitDef(it) => {
224 let c = Trait::from_source(db, src.with_value(it))?;
225 c.id.child_by_source(db)
227 ast::ImplBlock(it) => {
228 let c = ImplBlock::from_source(db, src.with_value(it))?;
229 c.id.child_by_source(db)
232 let f = Function::from_source(db, src.with_value(it))?;
233 DefWithBodyId::from(f.id)
242 let module_source = ModuleSource::from_child_node(db, src);
243 let c = Module::from_definition(db, src.with_value(module_source))?;
244 Some(c.id.child_by_source(db))