egui/egui_demo_app/src/main.rs

#![forbid(unsafe_code)]
#![cfg_attr(not(debug_assertions), deny(warnings))] // Forbid warnings in release builds
#![warn(clippy::all, rust_2018_idioms)]

// When compiling natively:
fn main() {
    let app = egui_demo_lib::WrapApp::default();
    eframe::run_native(Box::new(app));
}