Resolve paths to defs (functions currently) during type inference

crates/ra_hir/src/function.rs

@@ -5,12 +5,13 @@ use std::{
     sync::Arc,
 };
 
+use ra_db::Cancelable;
 use ra_syntax::{
     TextRange, TextUnit,
     ast::{self, AstNode, DocCommentsOwner, NameOwner},
 };
 
-use crate::{ DefId, HirDatabase, ty::InferenceResult };
+use crate::{ DefId, HirDatabase, ty::InferenceResult, Module };
 
 pub use self::scope::FnScopes;
 
@@ -18,7 +19,7 @@ pub use self::scope::FnScopes;
 pub struct FnId(pub(crate) DefId);
 
 pub struct Function {
-    fn_id: FnId,
+    pub(crate) fn_id: FnId,
 }
 
 impl Function {
@@ -27,6 +28,10 @@ impl Function {
         Function { fn_id }
     }
 
+    pub fn syntax(&self, db: &impl HirDatabase) -> ast::FnDefNode {
+        db.fn_syntax(self.fn_id)
+    }
+
     pub fn scopes(&self, db: &impl HirDatabase) -> Arc<FnScopes> {
         db.fn_scopes(self.fn_id)
     }
@@ -36,9 +41,14 @@ impl Function {
         FnSignatureInfo::new(syntax.borrowed())
     }
 
-    pub fn infer(&self, db: &impl HirDatabase) -> Arc<InferenceResult> {
+    pub fn infer(&self, db: &impl HirDatabase) -> Cancelable<Arc<InferenceResult>> {
         db.infer(self.fn_id)
     }
+
+    pub fn module(&self, db: &impl HirDatabase) -> Cancelable<Module> {
+        let loc = self.fn_id.0.loc(db);
+        Module::new(db, loc.source_root_id, loc.module_id)
+    }
 }
 
 #[derive(Debug, Clone)]