Trait QueryState 

pub trait QueryState:
    Send
    + Sync
    + Clone
    + 'static { }

Trait for query state types.

Query state caches information needed for efficient query execution. The state is initialized once and reused for all query operations.

Requirements

State types must be:

• Send + Sync: For parallel query execution
• Clone: To allow query state to be copied if needed

Example

use goud_engine::ecs::component::ComponentId;
use goud_engine::ecs::query::QueryState;

// ComponentId implements QueryState
fn requires_query_state<S: QueryState>() {}
requires_query_state::<ComponentId>();

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T: Send + Sync + Clone + 'static> QueryState for T