JoJoJet d9113cca6f Make #[system_param(ignore)] and #[world_query(ignore)] unnecessary (#8030) ... # Objective When using `PhantomData` fields with the `#[derive(SystemParam)]` or `#[derive(WorldQuery)]` macros, the user is required to add the `#[system_param(ignore)]` attribute so that the macro knows to treat that field specially. This is undesirable, since it makes the macro more fragile and less consistent. ## Solution Implement `SystemParam` and `WorldQuery` for `PhantomData`. This makes the `ignore` attributes unnecessary. Some internal changes make the derive macro compatible with types that have invariant lifetimes, which fixes #8192. From what I can tell, this fix requires `PhantomData` to implement `SystemParam` in order to ensure that all of a type's generic parameters are always constrained. --- ## Changelog + Implemented `SystemParam` and `WorldQuery` for `PhantomData<T>`. + Fixed a miscompilation caused when invariant lifetimes were used with the `SystemParam` macro.		2023-03-30 15:12:26 +00:00
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src	Make #[system_param(ignore)] and #[world_query(ignore)] unnecessary (#8030)	2023-03-30 15:12:26 +00:00
Cargo.toml	chore: Release (#7920)	2023-03-06 05:13:36 +00:00