refactor(examples): migrate renderers to return RenderResult and add

std::io::Write import

Replace r_println!/r_print! macro usage across all example renderers
with
explicit RenderResult construction using std::io::Write, enabling more
flexible output handling and reducing reliance on macro-side effects.

1 files changed, 6 insertions, 3 deletions

diff --git a/examples/example-combine-pathf-dispatch-tree/src/sub/mod.rs b/examples/example-combine-pathf-dispatch-tree/src/sub/mod.rs
index e0b7743..5ab0ece 100644
--- a/examples/example-combine-pathf-dispatch-tree/src/sub/mod.rs
+++ b/examples/example-combine-pathf-dispatch-tree/src/sub/mod.rs
@@ -1,5 +1,6 @@
 use crate::Next;
-use mingling::{macros::r_println, prelude::*};
+use mingling::prelude::*;
+use std::io::Write;
 
 dispatcher!("hello");
 
@@ -17,6 +18,8 @@ pub fn handle_my(args: EntryHello) -> Next {
 }
 
 #[renderer]
-pub fn render_my(msg: ResultMessage) {
-    r_println!("Hello, {}!", *msg);
+pub fn render_my(msg: ResultMessage) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(render_result, "Hello, {}!", *msg).ok();
+    render_result
 }