From 35b3fc02e02fa21deb51105d04132d55d4282754 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Wed, 2 Jan 2019 16:00:01 +0300
Subject: comments

---
 crates/ra_hir/src/ids.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'crates/ra_hir/src/ids.rs')

diff --git a/crates/ra_hir/src/ids.rs b/crates/ra_hir/src/ids.rs
index 3504317ed..6d59ef659 100644
--- a/crates/ra_hir/src/ids.rs
+++ b/crates/ra_hir/src/ids.rs
@@ -29,6 +29,8 @@ use crate::{
 pub struct HirFileId(HirFileIdRepr);
 
 impl HirFileId {
+    /// For macro-expansion files, returns the file original source file the
+    /// expansionoriginated from.
     pub(crate) fn original_file_id(self, db: &impl HirDatabase) -> FileId {
         match self.0 {
             HirFileIdRepr::File(file_id) => file_id,
@@ -45,6 +47,7 @@ impl HirFileId {
             HirFileIdRepr::Macro(_r) => panic!("macro generated file: {:?}", self),
         }
     }
+
     pub(crate) fn hir_source_file(db: &impl HirDatabase, file_id: HirFileId) -> SourceFileNode {
         match file_id.0 {
             HirFileIdRepr::File(file_id) => db.source_file(file_id),
-- 
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