Derive Macro specs::prelude::SystemData

#[derive(SystemData)]

Used to #[derive] the trait SystemData.

You need to have the following items included in the current scope:

• SystemData
• World
• ResourceId

This macro can either be used directly via shred-derive, or by enabling the shred-derive feature for another crate (e.g. shred or specs, which both reexport the macro).