bevy/crates/bevy_asset
robtfm 7ff61a8dc9
derive asset for enums (#10410)
# Objective

allow deriving `Asset` for enums, and for tuple structs.

## Solution

add to the proc macro, generating visitor calls to the variant's data
(if required).

supports unnamed or named field variants, and struct variants when the
struct also derives `Asset`:
```rust
#[derive(Asset, TypePath)]
pub enum MyAssetEnum {
    Unnamed (
        #[dependency]
        Handle<Image>
    ),
    Named {
        #[dependency]
        array_handle: Handle<Image>,
        #[dependency]
        atlas_handles: Vec<Handle<Image>>,
    },
    StructStyle(
        #[dependency]
        VariantStruct
    ),
    Empty,
}

#[derive(Asset, TypePath)]
pub struct VariantStruct {
    // ...
}
```

also extend the struct implementation to support tuple structs: 
```rust
#[derive(Asset, TypePath)]
pub struct MyImageNewtype(
    #[dependency]
    Handle<Image>
);
````

---------

Co-authored-by: Nicola Papale <nico@nicopap.ch>
2023-11-21 01:06:55 +00:00
..
macros derive asset for enums (#10410) 2023-11-21 01:06:55 +00:00
src derive asset for enums (#10410) 2023-11-21 01:06:55 +00:00
Cargo.toml Add [lints] table, fix adding #![allow(clippy::type_complexity)] everywhere (#10011) 2023-11-18 20:58:48 +00:00