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-<h1 align="center">Renderer</h1>
-<p align="center">
-    Mingling's Basic Components
-</p>
-
----
-
-## Intro
-
-`Renderer` is similar to [Chain](pages/2-basic/4-chain) in that they both handle processing for a specific type. The difference is: [Chain](pages/2-basic/4-chain) transforms the type, while `Renderer` terminates the program and prints the information of that type to the terminal.
-
-A type can be processed by both [Chain](pages/2-basic/4-chain) and `Renderer`. If the type is `route_chain`ed, the system will search for a [Chain](pages/2-basic/4-chain) capable of handling that type. If none is found, it will automatically be routed to the `Renderer` to print the result of that type.
-
-The following example demonstrates how to handle rendering logic:
-
-```rust
-dispatcher!("hello",
-    HelloCommand => HelloEntry);
-
-pack!(ParsedHello = String);
-
-// It's the Chain defined in the Dispatcher chapter
-#[chain]
-fn parse_hello(prev: HelloEntry) -> NextProcess {
-    let args = &*prev;
-    let first = args
-        .first()
-        .cloned()
-        .unwrap_or_else(|| 
-            "World".to_string()
-        );
-
-    // Distribute the type to the Renderer
-    ParsedHello::new(first).to_render()
-}
-
-// Define the renderer to 
-//   handle rendering of ParsedHello
-#[renderer]
-fn render_hello(prev: ParsedHello) {
-    // Use r_println or r_print to 
-    //   render the content of ParsedHello
-    r_println!("Hello, {}!", *prev)
-}
-```
-
-> [!Tip]
-> `r_print!` can only be used inside a `Renderer`. This is because after the `renderer!` macro expands, it injects `r: &mut RenderResult` into the context.
->
-> And `r_print!` directly writes content to the value `r`.
-> This means: if there is no `&mut RenderResult` named `r` in the context, `r_print!` cannot be used.
-
-## Manual Impl
-
-Similarly, you can also manually implement `Renderer`,
-
-but note that inside the `renderer!` macro, a `register_type!` macro is executed. This macro itself does not expand into any content; it is only used to inform the `gen_program` context that the type exists:
-
-```rust
-struct RenderHello;
-impl Renderer for RenderHello {
-    type Previous = ParsedHello;
-    fn render(
-        prev: Self::Previous, 
-        r: &mut RenderResult
-    ) {
-        r_println!("Hello, {}!", *prev)
-    }
-}
- 
-// Register renderer to the context
-register_renderer!(ParsedHello, RenderHello);
-```