Type used on a private property is exported from generated Rust code

[ultimaweapon]

Bug Description

If I declare an enum and use it on a private property the enum also exported from the generated Rust code. This will lead to compilation error if I have the same enum name but on a different module.

I put the reproducible code in https://github.com/ultimaweapon/slint-bug. There are two Page enum in the ui/menu.slint and ui/wizard.slint, which cause following errors:

     |
6    |      # [allow (dead_code)] # [derive (Default , Copy , Clone , PartialEq , Debug)] pub enum r#Page {
     |                                                                                    --------------- variant or associated item `Intro` not found for this enum
...
1485 |                     ) . apply_pin (_self) . get ()) == (r#Page :: r#Intro)) as bool)) as _ }
     |                                                                   ^^^^^^^ variant or associated item not found in `Page`

Reproducible Code (if applicable)

No response

Environment Details

• Slint Version: 1.8.0
• Platform/OS: Arch Linux with GNOME on Wayland
• Programming Language: Rust
• Backend/Renderer: Default

Product Impact

I can workaround by using a different name but it is not convenience.

[ogoffart]

Indeed, we should filter a bit to limit ourselves with exported enum/struct, and maybe the ones used in public properties for compatibility