From 5d91f0e9408e39afaa75f96b32c5ed7946a558f7 Mon Sep 17 00:00:00 2001
From: 魏曹先生 <1992414357@qq.com>
Date: Sun, 29 Mar 2026 14:06:50 +0800
Subject: Add fallback dispatcher for missing renderers.

---
 mingling/src/program/hint.rs | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'mingling/src/program/hint.rs')

diff --git a/mingling/src/program/hint.rs b/mingling/src/program/hint.rs
index e9c510b..bf35fea 100644
--- a/mingling/src/program/hint.rs
+++ b/mingling/src/program/hint.rs
@@ -50,3 +50,35 @@ impl Dispatcher for DispatcherNotFound {
         Box::new(DispatcherNotFound)
     }
 }
+
+/// Marker: Renderer Not Found
+///
+/// If a Chain outputs NoRendererFound to the Chain,
+/// the program will terminate directly.
+///
+/// You can implement Renderer for NoRendererFound
+/// to render relevant information when a Renderer cannot be found.
+#[cfg_attr(feature = "serde_renderer", derive(serde::Serialize))]
+pub struct NoRendererFound {
+    pub type_to_render: String,
+}
+
+#[derive(Default)]
+#[cfg_attr(feature = "serde_renderer", derive(serde::Serialize))]
+pub struct RendererNotFound;
+impl Dispatcher for RendererNotFound {
+    fn node(&self) -> crate::Node {
+        Node::default().join("_not_found")
+    }
+
+    fn begin(&self, args: Vec<String>) -> ChainProcess {
+        AnyOutput::new(NoRendererFound {
+            type_to_render: args.get(0).unwrap().clone(),
+        })
+        .route_renderer()
+    }
+
+    fn clone_dispatcher(&self) -> Box<dyn Dispatcher> {
+        Box::new(RendererNotFound)
+    }
+}
-- 
cgit