remove FnId

crates/ra_hir/src/db.rs

@@ -3,7 +3,6 @@ use std::sync::Arc;
 use ra_syntax::{
     SmolStr,
     SyntaxNode,
-    ast::FnDefNode,
 };
 use ra_db::{SourceRootId, LocationIntener, SyntaxDatabase, FileId, Cancelable};
 
@@ -12,7 +11,6 @@ use crate::{
     SourceFileItems, SourceItemId,
     query_definitions,
     FnScopes,
-    function::FnId,
     module::{ModuleId, ModuleTree, ModuleSource,
     nameres::{ItemMap, InputModuleItems}},
     ty::{InferenceResult, Ty},
@@ -24,14 +22,10 @@ salsa::query_group! {
 pub trait HirDatabase: SyntaxDatabase
     + AsRef<LocationIntener<DefLoc, DefId>>
 {
-    fn fn_scopes(fn_id: FnId) -> Arc<FnScopes> {
+    fn fn_scopes(def_id: DefId) -> Arc<FnScopes> {
         type FnScopesQuery;
         use fn query_definitions::fn_scopes;
     }
-    fn fn_syntax(fn_id: FnId) -> FnDefNode {
-        type FnSyntaxQuery;
-        use fn query_definitions::fn_syntax;
-    }
 
     fn struct_data(def_id: DefId) -> Cancelable<Arc<StructData>> {
         type StructDataQuery;
@@ -43,7 +37,7 @@ pub trait HirDatabase: SyntaxDatabase
         use fn query_definitions::enum_data;
     }
 
-    fn infer(fn_id: FnId) -> Cancelable<Arc<InferenceResult>> {
+    fn infer(def_id: DefId) -> Cancelable<Arc<InferenceResult>> {
         type InferQuery;
         use fn query_definitions::infer;
     }

crates/ra_hir/src/function.rs

@@ -11,43 +11,42 @@ use ra_syntax::{
     ast::{self, AstNode, DocCommentsOwner, NameOwner},
 };
 
-use crate::{ DefId, HirDatabase, ty::InferenceResult, Module };
+use crate::{DefId, DefKind, HirDatabase, ty::InferenceResult, Module};
 
 pub use self::scope::FnScopes;
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
-pub struct FnId(pub(crate) DefId);
-
 #[derive(Debug)]
 pub struct Function {
-    pub(crate) fn_id: FnId,
+    def_id: DefId,
 }
 
 impl Function {
     pub(crate) fn new(def_id: DefId) -> Function {
-        let fn_id = FnId(def_id);
-        Function { fn_id }
+        Function { def_id }
     }
 
     pub fn syntax(&self, db: &impl HirDatabase) -> ast::FnDefNode {
-        db.fn_syntax(self.fn_id)
+        let def_loc = self.def_id.loc(db);
+        assert!(def_loc.kind == DefKind::Function);
+        let syntax = db.file_item(def_loc.source_item_id);
+        ast::FnDef::cast(syntax.borrowed()).unwrap().owned()
     }
 
     pub fn scopes(&self, db: &impl HirDatabase) -> Arc<FnScopes> {
-        db.fn_scopes(self.fn_id)
+        db.fn_scopes(self.def_id)
     }
 
     pub fn signature_info(&self, db: &impl HirDatabase) -> Option<FnSignatureInfo> {
-        let syntax = db.fn_syntax(self.fn_id);
+        let syntax = self.syntax(db);
         FnSignatureInfo::new(syntax.borrowed())
     }
 
     pub fn infer(&self, db: &impl HirDatabase) -> Cancelable<Arc<InferenceResult>> {
-        db.infer(self.fn_id)
+        db.infer(self.def_id)
     }
 
     pub fn module(&self, db: &impl HirDatabase) -> Cancelable<Module> {
-        self.fn_id.0.module(db)
+        self.def_id.module(db)
     }
 }
 

crates/ra_hir/src/mock.rs

@@ -189,7 +189,6 @@ salsa::database_storage! {
             fn file_item() for db::FileItemQuery;
             fn input_module_items() for db::InputModuleItemsQuery;
             fn item_map() for db::ItemMapQuery;
-            fn fn_syntax() for db::FnSyntaxQuery;
             fn submodules() for db::SubmodulesQuery;
             fn infer() for db::InferQuery;
             fn type_for_def() for db::TypeForDefQuery;

crates/ra_hir/src/query_definitions.rs

@@ -5,15 +5,15 @@ use std::{
 
 use rustc_hash::FxHashMap;
 use ra_syntax::{
-    AstNode,  SyntaxNode, SmolStr,
-    ast::{self, FnDef, FnDefNode, NameOwner, ModuleItemOwner}
+    AstNode, SyntaxNode, SmolStr,
+    ast::{self, NameOwner, ModuleItemOwner}
 };
 use ra_db::{SourceRootId, FileId, Cancelable,};
 
 use crate::{
     SourceFileItems, SourceItemId, DefKind, Function, DefId, Name, AsName,
     db::HirDatabase,
-    function::{FnScopes, FnId},
+    function::FnScopes,
     module::{
         ModuleSource, ModuleSourceNode, ModuleId,
         imp::Submodule,
@@ -23,22 +23,15 @@ use crate::{
     adt::{StructData, EnumData},
 };
 
-/// Resolve `FnId` to the corresponding `SyntaxNode`
-pub(super) fn fn_syntax(db: &impl HirDatabase, fn_id: FnId) -> FnDefNode {
-    let def_loc = fn_id.0.loc(db);
-    assert!(def_loc.kind == DefKind::Function);
-    let syntax = db.file_item(def_loc.source_item_id);
-    FnDef::cast(syntax.borrowed()).unwrap().owned()
-}
-
-pub(super) fn fn_scopes(db: &impl HirDatabase, fn_id: FnId) -> Arc<FnScopes> {
-    let syntax = db.fn_syntax(fn_id);
+pub(super) fn fn_scopes(db: &impl HirDatabase, def_id: DefId) -> Arc<FnScopes> {
+    let function = Function::new(def_id);
+    let syntax = function.syntax(db);
     let res = FnScopes::new(syntax.borrowed());
     Arc::new(res)
 }
 
-pub(super) fn infer(db: &impl HirDatabase, fn_id: FnId) -> Cancelable<Arc<InferenceResult>> {
-    let function = Function { fn_id };
+pub(super) fn infer(db: &impl HirDatabase, def_id: DefId) -> Cancelable<Arc<InferenceResult>> {
+    let function = Function::new(def_id);
     ty::infer(db, function).map(Arc::new)
 }