Use Index for CrateGraph

Author: matklad

crates/ra_db/src/input.rs

@@ -6,7 +6,7 @@
 //! actual IO. See `vfs` and `project_model` in the `rust-analyzer` crate for how
 //! actual IO is done and lowered to input.
 
-use std::{fmt, str::FromStr};
+use std::{fmt, ops, str::FromStr};
 
 use ra_cfg::CfgOptions;
 use ra_syntax::SmolStr;
@@ -174,10 +174,6 @@ impl CrateGraph {
         self.arena.keys().copied()
     }
 
-    pub fn crate_data(&self, crate_id: &CrateId) -> &CrateData {
-        &self.arena[crate_id]
-    }
-
     // FIXME: this only finds one crate with the given root; we could have multiple
     pub fn crate_id_for_crate_root(&self, file_id: FileId) -> Option<CrateId> {
         let (&crate_id, _) =
@@ -207,7 +203,7 @@ impl CrateGraph {
             return false;
         }
 
-        for dep in &self.crate_data(&from).dependencies {
+        for dep in &self[from].dependencies {
             let crate_id = dep.crate_id();
             if crate_id == target {
                 return true;
@@ -221,6 +217,13 @@ impl CrateGraph {
     }
 }
 
+impl ops::Index<CrateId> for CrateGraph {
+    type Output = CrateData;
+    fn index(&self, crate_id: CrateId) -> &CrateData {
+        &self.arena[&crate_id]
+    }
+}
+
 impl CrateId {
     pub fn shift(self, amount: u32) -> CrateId {
         CrateId(self.0 + amount)
@@ -376,7 +379,7 @@ mod tests {
             .add_dep(crate1, CrateName::normalize_dashes("crate-name-with-dashes"), crate2)
             .is_ok());
         assert_eq!(
-            graph.crate_data(&crate1).dependencies,
+            graph[crate1].dependencies,
             vec![Dependency { crate_id: crate2, name: "crate_name_with_dashes".into() }]
         );
     }

crates/ra_hir/src/code_model.rs

@@ -54,8 +54,7 @@ pub struct CrateDependency {
 
 impl Crate {
     pub fn dependencies(self, db: &impl DefDatabase) -> Vec<CrateDependency> {
-        db.crate_graph()
-            .crate_data(&self.id)
+        db.crate_graph()[self.id]
             .dependencies
             .iter()
             .map(|dep| {
@@ -72,7 +71,7 @@ impl Crate {
         crate_graph
             .iter()
             .filter(|&krate| {
-                crate_graph.crate_data(&krate).dependencies.iter().any(|it| it.crate_id == self.id)
+                crate_graph[krate].dependencies.iter().any(|it| it.crate_id == self.id)
             })
             .map(|id| Crate { id })
             .collect()
@@ -84,11 +83,11 @@ impl Crate {
     }
 
     pub fn root_file(self, db: &impl DefDatabase) -> FileId {
-        db.crate_graph().crate_data(&self.id).root_file_id
+        db.crate_graph()[self.id].root_file_id
     }
 
     pub fn edition(self, db: &impl DefDatabase) -> Edition {
-        db.crate_graph().crate_data(&self.id).edition
+        db.crate_graph()[self.id].edition
     }
 
     pub fn all(db: &impl DefDatabase) -> Vec<Crate> {

crates/ra_hir_def/src/find_path.rs

@@ -176,7 +176,7 @@ fn find_importable_locations(
     // directly (only through reexports in direct dependencies).
     for krate in Some(from.krate)
         .into_iter()
-        .chain(crate_graph.crate_data(&from.krate).dependencies.iter().map(|dep| dep.crate_id))
+        .chain(crate_graph[from.krate].dependencies.iter().map(|dep| dep.crate_id))
     {
         result.extend(
             importable_locations_in_crate(db, item, krate)

crates/ra_hir_def/src/lang_item.rs

@@ -116,8 +116,7 @@ impl LangItems {
         if let Some(target) = start_crate_target {
             return Some(*target);
         }
-        db.crate_graph()
-            .crate_data(&start_crate)
+        db.crate_graph()[start_crate]
             .dependencies
             .iter()
             .find_map(|dep| db.lang_item(dep.crate_id, item.clone()))

crates/ra_hir_def/src/nameres.rs

@@ -179,7 +179,7 @@ impl CrateDefMap {
     pub(crate) fn crate_def_map_query(db: &impl DefDatabase, krate: CrateId) -> Arc<CrateDefMap> {
         let _p = profile("crate_def_map_query");
         let def_map = {
-            let edition = db.crate_graph().crate_data(&krate).edition;
+            let edition = db.crate_graph()[krate].edition;
             let mut modules: Arena<LocalModuleId, ModuleData> = Arena::default();
             let root = modules.alloc(ModuleData::default());
             CrateDefMap {

crates/ra_hir_def/src/nameres/collector.rs

@@ -34,7 +34,7 @@ pub(super) fn collect_defs(db: &impl DefDatabase, mut def_map: CrateDefMap) -> C
     let crate_graph = db.crate_graph();
 
     // populate external prelude
-    for dep in &crate_graph.crate_data(&def_map.krate).dependencies {
+    for dep in &crate_graph[def_map.krate].dependencies {
         let dep_def_map = db.crate_def_map(dep.crate_id);
         log::debug!("crate dep {:?} -> {:?}", dep.name, dep.crate_id);
         def_map.extern_prelude.insert(
@@ -128,7 +128,7 @@ where
     DB: DefDatabase,
 {
     fn collect(&mut self) {
-        let file_id = self.db.crate_graph().crate_data(&self.def_map.krate).root_file_id;
+        let file_id = self.db.crate_graph()[self.def_map.krate].root_file_id;
         let raw_items = self.db.raw_items(file_id.into());
         let module_id = self.def_map.root;
         self.def_map.modules[module_id].origin = ModuleOrigin::CrateRoot { definition: file_id };
@@ -954,7 +954,7 @@ mod tests {
         let krate = db.test_crate();
 
         let def_map = {
-            let edition = db.crate_graph().crate_data(&krate).edition;
+            let edition = db.crate_graph()[krate].edition;
             let mut modules: Arena<LocalModuleId, ModuleData> = Arena::default();
             let root = modules.alloc(ModuleData::default());
             CrateDefMap {

crates/ra_hir_ty/src/traits.rs

@@ -47,7 +47,7 @@ pub(crate) fn impls_for_trait_query(
     // will only ever get called for a few crates near the root of the tree (the
     // ones the user is editing), so this may actually be a waste of memory. I'm
     // doing it like this mainly for simplicity for now.
-    for dep in &db.crate_graph().crate_data(&krate).dependencies {
+    for dep in &db.crate_graph()[krate].dependencies {
         impls.extend(db.impls_for_trait(dep.crate_id, trait_).iter());
     }
     let crate_impl_defs = db.impls_in_crate(krate);

crates/ra_ide/src/hover.rs

@@ -121,7 +121,7 @@ fn definition_owner_name(db: &RootDatabase, def: &Definition) -> Option<String>
 
 fn determine_mod_path(db: &RootDatabase, def: &Definition) -> Option<String> {
     let mod_path = def.module(db).map(|module| {
-        once(db.crate_graph().crate_data(&module.krate().into()).display_name.clone())
+        once(db.crate_graph()[module.krate().into()].display_name.clone())
             .chain(
                 module
                     .path_to_root(db)

crates/ra_ide/src/lib.rs

@@ -421,12 +421,12 @@ impl Analysis {
 
     /// Returns the edition of the given crate.
     pub fn crate_edition(&self, crate_id: CrateId) -> Cancelable<Edition> {
-        self.with_db(|db| db.crate_graph().crate_data(&crate_id).edition)
+        self.with_db(|db| db.crate_graph()[crate_id].edition)
     }
 
     /// Returns the root file of the given crate.
     pub fn crate_root(&self, crate_id: CrateId) -> Cancelable<FileId> {
-        self.with_db(|db| db.crate_graph().crate_data(&crate_id).root_file_id)
+        self.with_db(|db| db.crate_graph()[crate_id].root_file_id)
     }
 
     /// Returns the set of possible targets to run for the current file.