From 9abfe4f9de9514c85c1c2a8fafb25d9eeb2fb266 Mon Sep 17 00:00:00 2001
From: Yifei <lyfmagic99@gmail.com>
Date: Tue, 31 May 2022 09:14:32 +0000
Subject: [PATCH] fix misleading type

---
 book/src/common_patterns/on_demand_inputs.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/book/src/common_patterns/on_demand_inputs.md b/book/src/common_patterns/on_demand_inputs.md
index 4d58e5c..bb40ab5 100644
--- a/book/src/common_patterns/on_demand_inputs.md
+++ b/book/src/common_patterns/on_demand_inputs.md
@@ -25,7 +25,7 @@ trait FileWatcher {
     fn did_change_file(&mut self, path: &Path);
 }
 
-fn read(db: &dyn salsa::Database, path: PathBuf) -> String {
+fn read(db: &dyn VfsDatabase, path: PathBuf) -> String {
     db.salsa_runtime()
         .report_synthetic_read(salsa::Durability::LOW);
     db.watch(&path);