bevy/examples/reflection/generic_reflection.rs
François e3fb23d4d3 add documentation on LogPlugin and more log usage (#1973)
Fixes #1895 

Changed most `println` to `info` in examples, some to `warn` when it was useful to differentiate from other more noisy logs.

Added doc on `LogPlugin`, how to configure it, and why (and how) you may need to disable it
2021-04-22 23:30:48 +00:00

26 lines
755 B
Rust

use bevy::{prelude::*, reflect::TypeRegistry};
use std::any::TypeId;
/// You must manually register each instance of a generic type
fn main() {
App::build()
.add_plugins(DefaultPlugins)
.register_type::<MyType<u32>>()
.add_startup_system(setup.system())
.run();
}
#[derive(Reflect)]
struct MyType<T: Reflect> {
value: T,
}
fn setup(type_registry: Res<TypeRegistry>) {
let type_registry = type_registry.read();
let registration = type_registry.get(TypeId::of::<MyType<u32>>()).unwrap();
info!("Registration for {} exists", registration.short_name());
// MyType<String> was not manually registered, so it does not exist
assert!(type_registry.get(TypeId::of::<MyType<String>>()).is_none());
}