Box the app creator (#1373)

eframe/examples/confirm_exit.rs

@@ -4,7 +4,11 @@ use eframe::egui;
 
 fn main() {
     let options = eframe::NativeOptions::default();
-    eframe::run_native("Confirm exit", options, |_cc| Box::new(MyApp::default()));
+    eframe::run_native(
+        "Confirm exit",
+        options,
+        Box::new(|_cc| Box::new(MyApp::default())),
+    );
 }
 
 #[derive(Default)]

eframe/examples/custom_3d.rs

@@ -15,9 +15,11 @@ use std::sync::Arc;
 
 fn main() {
     let options = eframe::NativeOptions::default();
-    eframe::run_native("Custom 3D painting in eframe", options, |cc| {
-        Box::new(MyApp::new(cc))
-    });
+    eframe::run_native(
+        "Custom 3D painting in eframe",
+        options,
+        Box::new(|cc| Box::new(MyApp::new(cc))),
+    );
 }
 
 struct MyApp {

eframe/examples/custom_font.rs

@@ -4,9 +4,11 @@ use eframe::egui;
 
 fn main() {
     let options = eframe::NativeOptions::default();
-    eframe::run_native("egui example: custom font", options, |cc| {
-        Box::new(MyApp::new(cc))
-    });
+    eframe::run_native(
+        "egui example: custom font",
+        options,
+        Box::new(|cc| Box::new(MyApp::new(cc))),
+    );
 }
 
 fn setup_custom_fonts(ctx: &egui::Context) {

eframe/examples/download_image.rs

@@ -9,7 +9,7 @@ fn main() {
     eframe::run_native(
         "Download and show an image with eframe/egui",
         options,
-        |_cc| Box::new(MyApp::default()),
+        Box::new(|_cc| Box::new(MyApp::default())),
     );
 }
 

eframe/examples/file_dialog.rs

@@ -10,7 +10,7 @@ fn main() {
     eframe::run_native(
         "Native file dialogs and drag-and-drop files",
         options,
-        |_cc| Box::new(MyApp::default()),
+        Box::new(|_cc| Box::new(MyApp::default())),
     );
 }
 

eframe/examples/hello_world.rs

@@ -4,7 +4,11 @@ use eframe::egui;
 
 fn main() {
     let options = eframe::NativeOptions::default();
-    eframe::run_native("My egui App", options, |_cc| Box::new(MyApp::default()));
+    eframe::run_native(
+        "My egui App",
+        options,
+        Box::new(|_cc| Box::new(MyApp::default())),
+    );
 }
 
 struct MyApp {

eframe/examples/image.rs

@@ -5,9 +5,11 @@ use egui_extras::RetainedImage;
 
 fn main() {
     let options = eframe::NativeOptions::default();
-    eframe::run_native("Show an image with eframe/egui", options, |_cc| {
-        Box::new(MyApp::default())
-    });
+    eframe::run_native(
+        "Show an image with eframe/egui",
+        options,
+        Box::new(|_cc| Box::new(MyApp::default())),
+    );
 }
 
 struct MyApp {

eframe/examples/svg.rs

@@ -11,7 +11,11 @@ fn main() {
         initial_window_size: Some(egui::vec2(1000.0, 700.0)),
         ..Default::default()
     };
-    eframe::run_native("svg example", options, |_cc| Box::new(MyApp::default()));
+    eframe::run_native(
+        "svg example",
+        options,
+        Box::new(|_cc| Box::new(MyApp::default())),
+    );
 }
 
 struct MyApp {