Different behavior between entt::any and entt::meta_any for non-copyable type

[pogmat]

Hello!
I noticed a discrepancy between entt::any and entt::meta_any when copying objects containing non-copyable types.

Observation

When copying a container with a non-copyable type:

• entt::any: The copy's operator bool() returns false (reports as empty)
• entt::meta_any: The copy's operator bool() returns true, but try_cast() returns nullptr

Code

I've prepared a minimal example demonstrating this behavior (attached).
I used g++ Gnu 15.2.1, entt library commit e08302e (HEAD of main at present time). Same behavior using v3.9.0.

Question

Is this the intended behavior?

Thanks!

[skypjack]

I guess 🤔 it's due to the vtable that is copied no matter what, even if storage{other.storage} fails to to the non-copiability of the contained type. Good catch. It's likely a bug, although pretty tricky. I'm taking note of it. 👍