Add URLPathTemplate to Route to make it easier to generate a API page that lists all routes by template

route.go

@@ -508,6 +508,19 @@ func (r *Route) URLPath(pairs ...string) (*url.URL, error) {
 	}, nil
 }
 
+// URLPathTemplate returns the template used to match against for the route
+//
+// The route must have a path defined.
+func (r *Route) URLPathTemplate() (string, error) {
+	if r.err != nil {
+		return "", r.err
+	}
+	if r.regexp == nil || r.regexp.path == nil {
+		return "", errors.New("mux: route doesn't have a path")
+	}
+	return r.regexp.path.template, nil
+}
+
 // prepareVars converts the route variable pairs into a map. If the route has a
 // BuildVarsFunc, it is invoked.
 func (r *Route) prepareVars(pairs ...string) (map[string]string, error) {