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pub use bevy_reflect_derive::TypeUuid;
pub use bevy_utils::Uuid;
pub trait TypeUuid {
const TYPE_UUID: Uuid;
}
pub trait TypeUuidDynamic {
fn type_uuid(&self) -> Uuid;
fn type_name(&self) -> &'static str;
}
impl<T> TypeUuidDynamic for T
where
T: TypeUuid,
{
fn type_uuid(&self) -> Uuid {
Self::TYPE_UUID
}
fn type_name(&self) -> &'static str {
std::any::type_name::<Self>()
}
}
#[cfg(test)]
mod test {
use super::*;
use crate as bevy_reflect;
use bevy_reflect_derive::TypeUuid;
use std::marker::PhantomData;
#[derive(TypeUuid)]
#[uuid = "af6466c2-a9f4-11eb-bcbc-0242ac130002"]
struct TestDeriveStruct<T>
where
T: Clone,
{
_value: T,
}
fn test_impl_type_uuid(_: &impl TypeUuid) {}
#[test]
fn test_generic_type_uuid_derive() {
#[derive(TypeUuid, Clone)]
#[uuid = "ebb16cc9-4d5a-453c-aa8c-c72bd8ec83a2"]
struct T;
let test_struct = TestDeriveStruct { _value: T };
test_impl_type_uuid(&test_struct);
}
#[test]
fn test_generic_type_unique_uuid() {
#[derive(TypeUuid, Clone)]
#[uuid = "49951b1c-4811-45e7-acc6-3119249fbd8f"]
struct A;
#[derive(TypeUuid, Clone)]
#[uuid = "4882b8f5-5556-4cee-bea6-a2e5991997b7"]
struct B;
let uuid_a = TestDeriveStruct::<A>::TYPE_UUID;
let uuid_b = TestDeriveStruct::<B>::TYPE_UUID;
assert_ne!(uuid_a, uuid_b);
assert_ne!(uuid_a, A::TYPE_UUID);
assert_ne!(uuid_b, B::TYPE_UUID);
}
#[test]
fn test_inverted_generic_type_unique_uuid() {
#[derive(TypeUuid, Clone)]
#[uuid = "49951b1c-4811-45e7-acc6-3119249fbd8f"]
struct Inner;
#[derive(TypeUuid, Clone)]
#[uuid = "23ebc0c3-ef69-4ea0-8c2a-dca1b4e27c0d"]
struct TestDeriveStructA<T>
where
T: Clone,
{
_phantom: PhantomData<T>,
}
#[derive(TypeUuid, Clone)]
#[uuid = "a82f9936-70cb-482a-bd3d-cb99d87de55f"]
struct TestDeriveStructB<T>
where
T: Clone,
{
_phantom: PhantomData<T>,
}
let uuid_ab = TestDeriveStructA::<TestDeriveStructB<Inner>>::TYPE_UUID;
let uuid_ba = TestDeriveStructB::<TestDeriveStructA<Inner>>::TYPE_UUID;
assert_ne!(uuid_ab, uuid_ba);
assert_ne!(uuid_ab, TestDeriveStructA::<Inner>::TYPE_UUID);
assert_ne!(uuid_ba, TestDeriveStructB::<Inner>::TYPE_UUID);
}
#[test]
fn test_generic_type_uuid_same_for_eq_param() {
#[derive(TypeUuid, Clone)]
#[uuid = "49951b1c-4811-45e7-acc6-3119249fbd8f"]
struct A;
#[derive(TypeUuid, Clone)]
#[uuid = "49951b1c-4811-45e7-acc6-3119249fbd8f"]
struct BButSameAsA;
let uuid_a = TestDeriveStruct::<A>::TYPE_UUID;
let uuid_b = TestDeriveStruct::<BButSameAsA>::TYPE_UUID;
assert_eq!(uuid_a, uuid_b);
}
}