Trait salsa::Query [−][src]
pub trait Query: Debug + Default + Sized + for<'d> QueryDb<'d> {
type Key: Clone + Debug + Hash + Eq;
type Value: Clone + Debug;
type Storage;
const QUERY_INDEX: u16;
const QUERY_NAME: &'static str;
fn query_storage<'a>(
group_storage: &'a <Self as QueryDb<'_>>::GroupStorage
) -> &'a Arc<Self::Storage>;
}
Expand description
Trait implements by all of the “special types” associated with each of your queries.
Associated Types
Type that you you give as a parameter – for queries with zero or more than one input, this will be a tuple.
Associated Constants
const QUERY_INDEX: u16
const QUERY_INDEX: u16
A unique index identifying this query within the group.
const QUERY_NAME: &'static str
const QUERY_NAME: &'static str
Name of the query method (e.g., foo
)
Required methods
fn query_storage<'a>(
group_storage: &'a <Self as QueryDb<'_>>::GroupStorage
) -> &'a Arc<Self::Storage>
fn query_storage<'a>(
group_storage: &'a <Self as QueryDb<'_>>::GroupStorage
) -> &'a Arc<Self::Storage>
Extact storage for this query from the storage for its group.