From 2de4ae3b393437e5a3698c20c98a5301b18de476 Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Fri, 21 Mar 2025 17:18:35 +0800
Subject: [PATCH] dereference_or_zero

---
 http_template_funcs.go | 8 ++++++++
 resources.go           | 2 +-

diff --git a/http_template_funcs.go b/http_template_funcs.go
index 5395b92a4612f2b075d75c04ddbb4d0efd92c76f..2a7d82670773202017d0056206699610527bc980 100644
--- a/http_template_funcs.go
+++ b/http_template_funcs.go
@@ -29,3 +29,11 @@
 func dereference[T any](p *T) T {
 	return *p
 }
+
+func dereference_or_zero[T any](p *T) T {
+	if p != nil {
+		return *p
+	}
+	var z T
+	return z
+}
diff --git a/resources.go b/resources.go
index 2576c12d4bf194868d160e1151e250638edcc5c6..fb67102b4701ae600d81762babb65f24eaa6aebd 100644
--- a/resources.go
+++ b/resources.go
@@ -44,7 +44,7 @@ 		"first_line":        firstLine,
 		"base_name":         baseName,
 		"path_escape":       pathEscape,
 		"query_escape":      queryEscape,
-		"dereference_error": dereference[error],
+		"dereference_error": dereference_or_zero[error],
 	})
 
 	err = fs.WalkDir(resourcesFS, "templates", func(path string, d fs.DirEntry, err error) error {

-- 
2.48.1