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|
//! When *constructing* `hir`, we start at some parent syntax node and recursively
//! lower the children.
//!
//! This modules allows one to go in the opposite direction: start with a syntax
//! node for a *child*, and get its hir.
use either::Either;
use hir_expand::HirFileId;
use syntax::ast::HasDocComments;
use crate::{
db::DefDatabase,
dyn_map::DynMap,
item_scope::ItemScope,
keys,
src::{HasChildSource, HasSource},
AdtId, AssocItemId, DefWithBodyId, EnumId, EnumVariantId, FieldId, ImplId, Lookup, MacroId,
ModuleDefId, ModuleId, TraitId, VariantId,
};
pub trait ChildBySource {
fn child_by_source(&self, db: &dyn DefDatabase, file_id: HirFileId) -> DynMap {
let mut res = DynMap::default();
self.child_by_source_to(db, &mut res, file_id);
res
}
fn child_by_source_to(&self, db: &dyn DefDatabase, map: &mut DynMap, file_id: HirFileId);
}
impl ChildBySource for TraitId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
let data = db.trait_data(*self);
data.attribute_calls().filter(|(ast_id, _)| ast_id.file_id == file_id).for_each(
|(ast_id, call_id)| {
res[keys::ATTR_MACRO_CALL].insert(ast_id.to_node(db.upcast()), call_id);
},
);
data.items.iter().for_each(|&(_, item)| {
add_assoc_item(db, res, file_id, item);
});
}
}
impl ChildBySource for ImplId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
let data = db.impl_data(*self);
data.attribute_calls().filter(|(ast_id, _)| ast_id.file_id == file_id).for_each(
|(ast_id, call_id)| {
res[keys::ATTR_MACRO_CALL].insert(ast_id.to_node(db.upcast()), call_id);
},
);
data.items.iter().for_each(|&item| {
add_assoc_item(db, res, file_id, item);
});
}
}
fn add_assoc_item(db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId, item: AssocItemId) {
match item {
AssocItemId::FunctionId(func) => {
let loc = func.lookup(db);
if loc.id.file_id() == file_id {
res[keys::FUNCTION].insert(loc.source(db).value, func)
}
}
AssocItemId::ConstId(konst) => {
let loc = konst.lookup(db);
if loc.id.file_id() == file_id {
res[keys::CONST].insert(loc.source(db).value, konst)
}
}
AssocItemId::TypeAliasId(ty) => {
let loc = ty.lookup(db);
if loc.id.file_id() == file_id {
res[keys::TYPE_ALIAS].insert(loc.source(db).value, ty)
}
}
}
}
impl ChildBySource for ModuleId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
let def_map = self.def_map(db);
let module_data = &def_map[self.local_id];
module_data.scope.child_by_source_to(db, res, file_id);
}
}
impl ChildBySource for ItemScope {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
self.declarations().for_each(|item| add_module_def(db, res, file_id, item));
self.impls().for_each(|imp| add_impl(db, res, file_id, imp));
self.unnamed_consts().for_each(|konst| {
let loc = konst.lookup(db);
if loc.id.file_id() == file_id {
res[keys::CONST].insert(loc.source(db).value, konst);
}
});
self.attr_macro_invocs().filter(|(id, _)| id.file_id == file_id).for_each(
|(ast_id, call_id)| {
res[keys::ATTR_MACRO_CALL].insert(ast_id.to_node(db.upcast()), call_id);
},
);
self.legacy_macros().for_each(|(_, ids)| {
ids.iter().for_each(|&id| {
if let MacroId::MacroRulesId(id) = id {
let loc = id.lookup(db);
if loc.id.file_id() == file_id {
res[keys::MACRO_RULES].insert(loc.source(db).value, id);
}
}
})
});
self.derive_macro_invocs().filter(|(id, _)| id.file_id == file_id).for_each(
|(ast_id, calls)| {
let adt = ast_id.to_node(db.upcast());
calls.for_each(|(attr_id, call_id, calls)| {
if let Some(Either::Left(attr)) =
adt.doc_comments_and_attrs().nth(attr_id.ast_index as usize)
{
res[keys::DERIVE_MACRO_CALL].insert(attr, (attr_id, call_id, calls.into()));
}
});
},
);
fn add_module_def(
db: &dyn DefDatabase,
map: &mut DynMap,
file_id: HirFileId,
item: ModuleDefId,
) {
macro_rules! insert {
($map:ident[$key:path].$insert:ident($id:ident)) => {{
let loc = $id.lookup(db);
if loc.id.file_id() == file_id {
$map[$key].$insert(loc.source(db).value, $id)
}
}};
}
match item {
ModuleDefId::FunctionId(id) => insert!(map[keys::FUNCTION].insert(id)),
ModuleDefId::ConstId(id) => insert!(map[keys::CONST].insert(id)),
ModuleDefId::StaticId(id) => insert!(map[keys::STATIC].insert(id)),
ModuleDefId::TypeAliasId(id) => insert!(map[keys::TYPE_ALIAS].insert(id)),
ModuleDefId::TraitId(id) => insert!(map[keys::TRAIT].insert(id)),
ModuleDefId::AdtId(adt) => match adt {
AdtId::StructId(id) => insert!(map[keys::STRUCT].insert(id)),
AdtId::UnionId(id) => insert!(map[keys::UNION].insert(id)),
AdtId::EnumId(id) => insert!(map[keys::ENUM].insert(id)),
},
ModuleDefId::MacroId(id) => match id {
MacroId::Macro2Id(id) => insert!(map[keys::MACRO2].insert(id)),
MacroId::MacroRulesId(id) => insert!(map[keys::MACRO_RULES].insert(id)),
MacroId::ProcMacroId(id) => insert!(map[keys::PROC_MACRO].insert(id)),
},
ModuleDefId::ModuleId(_)
| ModuleDefId::EnumVariantId(_)
| ModuleDefId::BuiltinType(_) => (),
}
}
fn add_impl(db: &dyn DefDatabase, map: &mut DynMap, file_id: HirFileId, imp: ImplId) {
let loc = imp.lookup(db);
if loc.id.file_id() == file_id {
map[keys::IMPL].insert(loc.source(db).value, imp)
}
}
}
}
impl ChildBySource for VariantId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, _: HirFileId) {
let arena_map = self.child_source(db);
let arena_map = arena_map.as_ref();
let parent = *self;
for (local_id, source) in arena_map.value.iter() {
let id = FieldId { parent, local_id };
match source.clone() {
Either::Left(source) => res[keys::TUPLE_FIELD].insert(source, id),
Either::Right(source) => res[keys::RECORD_FIELD].insert(source, id),
}
}
}
}
impl ChildBySource for EnumId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, _: HirFileId) {
let arena_map = self.child_source(db);
let arena_map = arena_map.as_ref();
for (local_id, source) in arena_map.value.iter() {
let id = EnumVariantId { parent: *self, local_id };
res[keys::VARIANT].insert(source.clone(), id)
}
}
}
impl ChildBySource for DefWithBodyId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
let body = db.body(*self);
if let &DefWithBodyId::VariantId(v) = self {
VariantId::EnumVariantId(v).child_by_source_to(db, res, file_id)
}
for (_, def_map) in body.blocks(db) {
// All block expressions are merged into the same map, because they logically all add
// inner items to the containing `DefWithBodyId`.
def_map[def_map.root()].scope.child_by_source_to(db, res, file_id);
}
}
}
|
