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//! Maps *syntax* of various definitions to their semantic ids.
use hir_def::{
child_by_source::ChildBySource,
dyn_map::DynMap,
expr::PatId,
keys::{self, Key},
ConstId, DefWithBodyId, EnumId, EnumVariantId, FieldId, FunctionId, GenericDefId, ImplId,
ModuleId, StaticId, StructId, TraitId, TypeAliasId, TypeParamId, UnionId, VariantId,
};
use hir_expand::{name::AsName, AstId, MacroDefKind};
use ra_db::FileId;
use ra_prof::profile;
use ra_syntax::{
ast::{self, NameOwner},
match_ast, AstNode, SyntaxNode,
};
use rustc_hash::FxHashMap;
use stdx::impl_from;
use crate::{db::HirDatabase, InFile, MacroDefId};
pub(super) type SourceToDefCache = FxHashMap<ChildContainer, DynMap>;
pub(super) struct SourceToDefCtx<'a, 'b> {
pub(super) db: &'b dyn HirDatabase,
pub(super) cache: &'a mut SourceToDefCache,
}
impl SourceToDefCtx<'_, '_> {
pub(super) fn file_to_def(&mut self, file: FileId) -> Option<ModuleId> {
let _p = profile("SourceBinder::to_module_def");
let (krate, local_id) = self.db.relevant_crates(file).iter().find_map(|&crate_id| {
let crate_def_map = self.db.crate_def_map(crate_id);
let local_id = crate_def_map.modules_for_file(file).next()?;
Some((crate_id, local_id))
})?;
Some(ModuleId { krate, local_id })
}
pub(super) fn module_to_def(&mut self, src: InFile<ast::Module>) -> Option<ModuleId> {
let _p = profile("module_to_def");
let parent_declaration = src
.as_ref()
.map(|it| it.syntax())
.cloned()
.ancestors_with_macros(self.db.upcast())
.skip(1)
.find_map(|it| {
let m = ast::Module::cast(it.value.clone())?;
Some(it.with_value(m))
});
let parent_module = match parent_declaration {
Some(parent_declaration) => self.module_to_def(parent_declaration),
None => {
let file_id = src.file_id.original_file(self.db.upcast());
self.file_to_def(file_id)
}
}?;
let child_name = src.value.name()?.as_name();
let def_map = self.db.crate_def_map(parent_module.krate);
let child_id = *def_map[parent_module.local_id].children.get(&child_name)?;
Some(ModuleId { krate: parent_module.krate, local_id: child_id })
}
pub(super) fn trait_to_def(&mut self, src: InFile<ast::TraitDef>) -> Option<TraitId> {
self.to_def(src, keys::TRAIT)
}
pub(super) fn impl_to_def(&mut self, src: InFile<ast::ImplDef>) -> Option<ImplId> {
self.to_def(src, keys::IMPL)
}
pub(super) fn fn_to_def(&mut self, src: InFile<ast::Fn>) -> Option<FunctionId> {
self.to_def(src, keys::FUNCTION)
}
pub(super) fn struct_to_def(&mut self, src: InFile<ast::StructDef>) -> Option<StructId> {
self.to_def(src, keys::STRUCT)
}
pub(super) fn enum_to_def(&mut self, src: InFile<ast::EnumDef>) -> Option<EnumId> {
self.to_def(src, keys::ENUM)
}
pub(super) fn union_to_def(&mut self, src: InFile<ast::UnionDef>) -> Option<UnionId> {
self.to_def(src, keys::UNION)
}
pub(super) fn static_to_def(&mut self, src: InFile<ast::StaticDef>) -> Option<StaticId> {
self.to_def(src, keys::STATIC)
}
pub(super) fn const_to_def(&mut self, src: InFile<ast::ConstDef>) -> Option<ConstId> {
self.to_def(src, keys::CONST)
}
pub(super) fn type_alias_to_def(&mut self, src: InFile<ast::TypeAlias>) -> Option<TypeAliasId> {
self.to_def(src, keys::TYPE_ALIAS)
}
pub(super) fn record_field_to_def(
&mut self,
src: InFile<ast::RecordFieldDef>,
) -> Option<FieldId> {
self.to_def(src, keys::RECORD_FIELD)
}
pub(super) fn tuple_field_to_def(
&mut self,
src: InFile<ast::TupleFieldDef>,
) -> Option<FieldId> {
self.to_def(src, keys::TUPLE_FIELD)
}
pub(super) fn enum_variant_to_def(
&mut self,
src: InFile<ast::EnumVariant>,
) -> Option<EnumVariantId> {
self.to_def(src, keys::ENUM_VARIANT)
}
pub(super) fn bind_pat_to_def(
&mut self,
src: InFile<ast::BindPat>,
) -> Option<(DefWithBodyId, PatId)> {
let container = self.find_pat_container(src.as_ref().map(|it| it.syntax()))?;
let (_body, source_map) = self.db.body_with_source_map(container);
let src = src.map(ast::Pat::from);
let pat_id = source_map.node_pat(src.as_ref())?;
Some((container, pat_id))
}
fn to_def<Ast: AstNode + 'static, ID: Copy + 'static>(
&mut self,
src: InFile<Ast>,
key: Key<Ast, ID>,
) -> Option<ID> {
let container = self.find_container(src.as_ref().map(|it| it.syntax()))?;
let db = self.db;
let dyn_map =
&*self.cache.entry(container).or_insert_with(|| container.child_by_source(db));
dyn_map[key].get(&src).copied()
}
pub(super) fn type_param_to_def(&mut self, src: InFile<ast::TypeParam>) -> Option<TypeParamId> {
let container: ChildContainer =
self.find_type_param_container(src.as_ref().map(|it| it.syntax()))?.into();
let db = self.db;
let dyn_map =
&*self.cache.entry(container).or_insert_with(|| container.child_by_source(db));
dyn_map[keys::TYPE_PARAM].get(&src).copied()
}
// FIXME: use DynMap as well?
pub(super) fn macro_call_to_def(&mut self, src: InFile<ast::MacroCall>) -> Option<MacroDefId> {
let kind = MacroDefKind::Declarative;
let file_id = src.file_id.original_file(self.db.upcast());
let krate = self.file_to_def(file_id)?.krate;
let file_ast_id = self.db.ast_id_map(src.file_id).ast_id(&src.value);
let ast_id = Some(AstId::new(src.file_id, file_ast_id));
Some(MacroDefId { krate: Some(krate), ast_id, kind, local_inner: false })
}
pub(super) fn find_container(&mut self, src: InFile<&SyntaxNode>) -> Option<ChildContainer> {
for container in src.cloned().ancestors_with_macros(self.db.upcast()).skip(1) {
let res: ChildContainer = match_ast! {
match (container.value) {
ast::Module(it) => {
let def = self.module_to_def(container.with_value(it))?;
def.into()
},
ast::TraitDef(it) => {
let def = self.trait_to_def(container.with_value(it))?;
def.into()
},
ast::ImplDef(it) => {
let def = self.impl_to_def(container.with_value(it))?;
def.into()
},
ast::Fn(it) => {
let def = self.fn_to_def(container.with_value(it))?;
DefWithBodyId::from(def).into()
},
ast::StructDef(it) => {
let def = self.struct_to_def(container.with_value(it))?;
VariantId::from(def).into()
},
ast::EnumDef(it) => {
let def = self.enum_to_def(container.with_value(it))?;
def.into()
},
ast::UnionDef(it) => {
let def = self.union_to_def(container.with_value(it))?;
VariantId::from(def).into()
},
ast::StaticDef(it) => {
let def = self.static_to_def(container.with_value(it))?;
DefWithBodyId::from(def).into()
},
ast::ConstDef(it) => {
let def = self.const_to_def(container.with_value(it))?;
DefWithBodyId::from(def).into()
},
ast::TypeAlias(it) => {
let def = self.type_alias_to_def(container.with_value(it))?;
def.into()
},
_ => continue,
}
};
return Some(res);
}
let def = self.file_to_def(src.file_id.original_file(self.db.upcast()))?;
Some(def.into())
}
fn find_type_param_container(&mut self, src: InFile<&SyntaxNode>) -> Option<GenericDefId> {
for container in src.cloned().ancestors_with_macros(self.db.upcast()).skip(1) {
let res: GenericDefId = match_ast! {
match (container.value) {
ast::Fn(it) => self.fn_to_def(container.with_value(it))?.into(),
ast::StructDef(it) => self.struct_to_def(container.with_value(it))?.into(),
ast::EnumDef(it) => self.enum_to_def(container.with_value(it))?.into(),
ast::TraitDef(it) => self.trait_to_def(container.with_value(it))?.into(),
ast::TypeAlias(it) => self.type_alias_to_def(container.with_value(it))?.into(),
ast::ImplDef(it) => self.impl_to_def(container.with_value(it))?.into(),
_ => continue,
}
};
return Some(res);
}
None
}
fn find_pat_container(&mut self, src: InFile<&SyntaxNode>) -> Option<DefWithBodyId> {
for container in src.cloned().ancestors_with_macros(self.db.upcast()).skip(1) {
let res: DefWithBodyId = match_ast! {
match (container.value) {
ast::ConstDef(it) => self.const_to_def(container.with_value(it))?.into(),
ast::StaticDef(it) => self.static_to_def(container.with_value(it))?.into(),
ast::Fn(it) => self.fn_to_def(container.with_value(it))?.into(),
_ => continue,
}
};
return Some(res);
}
None
}
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
pub(crate) enum ChildContainer {
DefWithBodyId(DefWithBodyId),
ModuleId(ModuleId),
TraitId(TraitId),
ImplId(ImplId),
EnumId(EnumId),
VariantId(VariantId),
TypeAliasId(TypeAliasId),
/// XXX: this might be the same def as, for example an `EnumId`. However,
/// here the children generic parameters, and not, eg enum variants.
GenericDefId(GenericDefId),
}
impl_from! {
DefWithBodyId,
ModuleId,
TraitId,
ImplId,
EnumId,
VariantId,
TypeAliasId,
GenericDefId
for ChildContainer
}
impl ChildContainer {
fn child_by_source(self, db: &dyn HirDatabase) -> DynMap {
let db = db.upcast();
match self {
ChildContainer::DefWithBodyId(it) => it.child_by_source(db),
ChildContainer::ModuleId(it) => it.child_by_source(db),
ChildContainer::TraitId(it) => it.child_by_source(db),
ChildContainer::ImplId(it) => it.child_by_source(db),
ChildContainer::EnumId(it) => it.child_by_source(db),
ChildContainer::VariantId(it) => it.child_by_source(db),
ChildContainer::TypeAliasId(_) => DynMap::default(),
ChildContainer::GenericDefId(it) => it.child_by_source(db),
}
}
}
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