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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,
keys,
src::{HasChildSource, HasSource},
AssocItemId, EnumId, EnumVariantId, ImplId, Lookup, ModuleDefId, ModuleId, StructFieldId,
TraitId, VariantId,
};
pub trait ChildBySource {
fn child_by_source(&self, db: &impl DefDatabase) -> DynMap;
}
impl ChildBySource for TraitId {
fn child_by_source(&self, db: &impl DefDatabase) -> DynMap {
let mut res = DynMap::default();
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)
}
}
}
res
}
}
impl ChildBySource for ImplId {
fn child_by_source(&self, db: &impl DefDatabase) -> DynMap {
let mut res = DynMap::default();
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)
}
}
}
res
}
}
impl ChildBySource for ModuleId {
fn child_by_source(&self, db: &impl DefDatabase) -> DynMap {
let mut res = DynMap::default();
let crate_def_map = db.crate_def_map(self.krate);
for item in crate_def_map[self.local_id].scope.declarations() {
match item {
ModuleDefId::FunctionId(func) => {
let src = func.lookup(db).source(db);
res[keys::FUNCTION].insert(src, func)
}
ModuleDefId::ConstId(konst) => {
let src = konst.lookup(db).source(db);
res[keys::CONST].insert(src, konst)
}
ModuleDefId::StaticId(statik) => {
let src = statik.lookup(db).source(db);
res[keys::STATIC].insert(src, statik)
}
ModuleDefId::TypeAliasId(ty) => {
let src = ty.lookup(db).source(db);
res[keys::TYPE_ALIAS].insert(src, ty)
}
_ => (),
}
}
res
}
}
impl ChildBySource for VariantId {
fn child_by_source(&self, db: &impl DefDatabase) -> DynMap {
let mut res = DynMap::default();
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 = StructFieldId { 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)
}
}
}
res
}
}
impl ChildBySource for EnumId {
fn child_by_source(&self, db: &impl DefDatabase) -> DynMap {
let mut res = DynMap::default();
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::ENUM_VARIANT].insert(arena_map.with_value(source.clone()), id)
}
res
}
}
|
