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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 crate::{
db::DefDatabase,
dyn_map::DynMap,
item_scope::ItemScope,
keys,
src::{HasChildSource, HasSource},
AdtId, AssocItemId, DefWithBodyId, EnumId, EnumVariantId, FieldId, ImplId, Lookup, ModuleDefId,
ModuleId, TraitId, VariantId,
};
pub trait ChildBySource {
fn child_by_source(&self, db: &dyn DefDatabase) -> DynMap {
let mut res = DynMap::default();
self.child_by_source_to(db, &mut res);
res
}
fn child_by_source_to(&self, db: &dyn DefDatabase, map: &mut DynMap);
}
impl ChildBySource for TraitId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
let data = db.trait_data(*self);
for (_name, item) in data.items.iter() {
match *item {
AssocItemId::FunctionId(func) => {
let src = func.lookup(db).source(db);
res[keys::FUNCTION].insert(src, func)
}
AssocItemId::ConstId(konst) => {
let src = konst.lookup(db).source(db);
res[keys::CONST].insert(src, konst)
}
AssocItemId::TypeAliasId(ty) => {
let src = ty.lookup(db).source(db);
res[keys::TYPE_ALIAS].insert(src, ty)
}
}
}
}
}
impl ChildBySource for ImplId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
let data = db.impl_data(*self);
for &item in data.items.iter() {
match item {
AssocItemId::FunctionId(func) => {
let src = func.lookup(db).source(db);
res[keys::FUNCTION].insert(src, func)
}
AssocItemId::ConstId(konst) => {
let src = konst.lookup(db).source(db);
res[keys::CONST].insert(src, konst)
}
AssocItemId::TypeAliasId(ty) => {
let src = ty.lookup(db).source(db);
res[keys::TYPE_ALIAS].insert(src, ty)
}
}
}
}
}
impl ChildBySource for ModuleId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
let def_map = self.def_map(db);
let module_data = &def_map[self.local_id];
module_data.scope.child_by_source_to(db, res);
}
}
impl ChildBySource for ItemScope {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
self.declarations().for_each(|item| add_module_def(db, res, item));
self.impls().for_each(|imp| add_impl(db, res, imp));
fn add_module_def(db: &dyn DefDatabase, map: &mut DynMap, item: ModuleDefId) {
match item {
ModuleDefId::FunctionId(func) => {
let src = func.lookup(db).source(db);
map[keys::FUNCTION].insert(src, func)
}
ModuleDefId::ConstId(konst) => {
let src = konst.lookup(db).source(db);
map[keys::CONST].insert(src, konst)
}
ModuleDefId::StaticId(statik) => {
let src = statik.lookup(db).source(db);
map[keys::STATIC].insert(src, statik)
}
ModuleDefId::TypeAliasId(ty) => {
let src = ty.lookup(db).source(db);
map[keys::TYPE_ALIAS].insert(src, ty)
}
ModuleDefId::TraitId(trait_) => {
let src = trait_.lookup(db).source(db);
map[keys::TRAIT].insert(src, trait_)
}
ModuleDefId::AdtId(adt) => match adt {
AdtId::StructId(strukt) => {
let src = strukt.lookup(db).source(db);
map[keys::STRUCT].insert(src, strukt)
}
AdtId::UnionId(union_) => {
let src = union_.lookup(db).source(db);
map[keys::UNION].insert(src, union_)
}
AdtId::EnumId(enum_) => {
let src = enum_.lookup(db).source(db);
map[keys::ENUM].insert(src, enum_)
}
},
_ => (),
}
}
fn add_impl(db: &dyn DefDatabase, map: &mut DynMap, imp: ImplId) {
let src = imp.lookup(db).source(db);
map[keys::IMPL].insert(src, imp)
}
}
}
impl ChildBySource for VariantId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
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 = FieldId { parent: *self, local_id };
match source {
Either::Left(source) => {
res[keys::TUPLE_FIELD].insert(arena_map.with_value(source.clone()), id)
}
Either::Right(source) => {
res[keys::RECORD_FIELD].insert(arena_map.with_value(source.clone()), id)
}
}
}
}
}
impl ChildBySource for EnumId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
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(arena_map.with_value(source.clone()), id)
}
}
}
impl ChildBySource for DefWithBodyId {
fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap) {
let body = db.body(*self);
for def_map in body.block_scopes.iter().filter_map(|block| db.block_def_map(*block)) {
// 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);
}
}
}
|
