From f42697e54b9d0a040011cb04c266d51710e249f1 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Fri, 20 Dec 2019 12:29:25 +0100
Subject: Support for nested traits

---
 crates/ra_hir/src/code_model.rs            |  2 +-
 crates/ra_hir_def/src/body/lower.rs        | 11 +++++++++--
 crates/ra_hir_def/src/lib.rs               |  6 +++---
 crates/ra_hir_def/src/nameres/collector.rs |  2 +-
 crates/ra_hir_ty/src/traits/chalk.rs       |  6 ++++--
 5 files changed, 18 insertions(+), 9 deletions(-)

(limited to 'crates')

diff --git a/crates/ra_hir/src/code_model.rs b/crates/ra_hir/src/code_model.rs
index d20e9de63..35e1f752b 100644
--- a/crates/ra_hir/src/code_model.rs
+++ b/crates/ra_hir/src/code_model.rs
@@ -553,7 +553,7 @@ pub struct Trait {
 
 impl Trait {
     pub fn module(self, db: &impl DefDatabase) -> Module {
-        Module { id: self.id.lookup(db).container }
+        Module { id: self.id.lookup(db).container.module(db) }
     }
 
     pub fn name(self, db: &impl DefDatabase) -> Name {
diff --git a/crates/ra_hir_def/src/body/lower.rs b/crates/ra_hir_def/src/body/lower.rs
index b61f924b7..853e17bae 100644
--- a/crates/ra_hir_def/src/body/lower.rs
+++ b/crates/ra_hir_def/src/body/lower.rs
@@ -26,7 +26,7 @@ use crate::{
     path::Path,
     type_ref::{Mutability, TypeRef},
     ConstLoc, ContainerId, DefWithBodyId, EnumLoc, FunctionLoc, Intern, ModuleDefId, StaticLoc,
-    StructLoc, TypeAliasLoc, UnionLoc,
+    StructLoc, TraitLoc, TypeAliasLoc, UnionLoc,
 };
 
 pub(super) fn lower(
@@ -522,7 +522,14 @@ where
                     let ast_id = self.expander.ast_id(&def);
                     UnionLoc { container, ast_id }.intern(self.db).into()
                 }
-                _ => continue,
+                ast::ModuleItem::TraitDef(def) => {
+                    let ast_id = self.expander.ast_id(&def);
+                    TraitLoc { container, ast_id }.intern(self.db).into()
+                }
+                ast::ModuleItem::ImplBlock(_)
+                | ast::ModuleItem::UseItem(_)
+                | ast::ModuleItem::ExternCrateItem(_)
+                | ast::ModuleItem::Module(_) => continue,
             };
             self.body.defs.push(def)
         }
diff --git a/crates/ra_hir_def/src/lib.rs b/crates/ra_hir_def/src/lib.rs
index 9b192b597..140eccf26 100644
--- a/crates/ra_hir_def/src/lib.rs
+++ b/crates/ra_hir_def/src/lib.rs
@@ -235,7 +235,7 @@ impl_intern_key!(TraitId);
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct TraitLoc {
-    pub container: ModuleId,
+    pub container: ContainerId,
     pub ast_id: AstId<ast::TraitDef>,
 }
 
@@ -499,7 +499,7 @@ impl HasModule for AssocContainerId {
         match *self {
             AssocContainerId::ContainerId(it) => it.module(db),
             AssocContainerId::ImplId(it) => it.lookup(db).container,
-            AssocContainerId::TraitId(it) => it.lookup(db).container,
+            AssocContainerId::TraitId(it) => it.lookup(db).container.module(db),
         }
     }
 }
@@ -548,7 +548,7 @@ impl HasModule for GenericDefId {
         match self {
             GenericDefId::FunctionId(it) => it.lookup(db).module(db),
             GenericDefId::AdtId(it) => it.module(db),
-            GenericDefId::TraitId(it) => it.lookup(db).container,
+            GenericDefId::TraitId(it) => it.lookup(db).container.module(db),
             GenericDefId::TypeAliasId(it) => it.lookup(db).module(db),
             GenericDefId::ImplId(it) => it.lookup(db).container,
             GenericDefId::EnumVariantId(it) => it.parent.lookup(db).container.module(db),
diff --git a/crates/ra_hir_def/src/nameres/collector.rs b/crates/ra_hir_def/src/nameres/collector.rs
index 74c3d4670..a1ea130e0 100644
--- a/crates/ra_hir_def/src/nameres/collector.rs
+++ b/crates/ra_hir_def/src/nameres/collector.rs
@@ -802,7 +802,7 @@ where
                 PerNs::values(def.into())
             }
             raw::DefKind::Trait(ast_id) => {
-                let def = TraitLoc { container: module, ast_id: AstId::new(self.file_id, ast_id) }
+                let def = TraitLoc { container, ast_id: AstId::new(self.file_id, ast_id) }
                     .intern(self.def_collector.db);
 
                 PerNs::types(def.into())
diff --git a/crates/ra_hir_ty/src/traits/chalk.rs b/crates/ra_hir_ty/src/traits/chalk.rs
index 6a31014d8..dd4fa9664 100644
--- a/crates/ra_hir_ty/src/traits/chalk.rs
+++ b/crates/ra_hir_ty/src/traits/chalk.rs
@@ -9,7 +9,9 @@ use chalk_ir::{
 };
 use chalk_rust_ir::{AssociatedTyDatum, AssociatedTyValue, ImplDatum, StructDatum, TraitDatum};
 
-use hir_def::{AssocContainerId, AssocItemId, GenericDefId, ImplId, Lookup, TraitId, TypeAliasId};
+use hir_def::{
+    AssocContainerId, AssocItemId, GenericDefId, HasModule, ImplId, Lookup, TraitId, TypeAliasId,
+};
 use ra_db::{
     salsa::{InternId, InternKey},
     CrateId,
@@ -591,7 +593,7 @@ pub(crate) fn trait_datum_query(
     let bound_vars = Substs::bound_vars(&generic_params);
     let flags = chalk_rust_ir::TraitFlags {
         auto: trait_data.auto,
-        upstream: trait_.lookup(db).container.krate != krate,
+        upstream: trait_.lookup(db).container.module(db).krate != krate,
         non_enumerable: true,
         coinductive: false, // only relevant for Chalk testing
         // FIXME set these flags correctly
-- 
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