Struct ra_ap_hir::db::AssociatedTyDataQuery
source · pub struct AssociatedTyDataQuery;
Implementations§
source§impl AssociatedTyDataQuery
impl AssociatedTyDataQuery
sourcepub fn in_db(
self,
db: &dyn HirDatabase
) -> QueryTable<'_, AssociatedTyDataQuery>
pub fn in_db( self, db: &dyn HirDatabase ) -> QueryTable<'_, AssociatedTyDataQuery>
Get access to extra methods pertaining to this query. You can also use it to invoke this query.
source§impl AssociatedTyDataQuery
impl AssociatedTyDataQuery
sourcepub fn in_db_mut(
self,
db: &mut dyn HirDatabase
) -> QueryTableMut<'_, AssociatedTyDataQuery>
pub fn in_db_mut( self, db: &mut dyn HirDatabase ) -> QueryTableMut<'_, AssociatedTyDataQuery>
Like in_db
, but gives access to methods for setting the
value of an input. Not applicable to derived queries.
§Threads, cancellation, and blocking
Mutating the value of a query cannot be done while there are
still other queries executing. If you are using your database
within a single thread, this is not a problem: you only have
&self
access to the database, but this method requires &mut self
.
However, if you have used snapshot
to create other threads,
then attempts to set
will block the current thread until
those snapshots are dropped (usually when those threads
complete). This also implies that if you create a snapshot but
do not send it to another thread, then invoking set
will
deadlock.
Before blocking, the thread that is attempting to set
will
also set a cancellation flag. This will cause any query
invocations in other threads to unwind with a Cancelled
sentinel value and eventually let the set
succeed once all
threads have unwound past the salsa invocation.
If your query implementations are performing expensive
operations without invoking another query, you can also use
the Runtime::unwind_if_cancelled
method to check for an
ongoing cancellation and bring those operations to a close,
thus allowing the set
to succeed. Otherwise, long-running
computations may lead to “starvation”, meaning that the
thread attempting to set
has to wait a long, long time. =)
Trait Implementations§
source§impl Debug for AssociatedTyDataQuery
impl Debug for AssociatedTyDataQuery
source§impl Default for AssociatedTyDataQuery
impl Default for AssociatedTyDataQuery
source§fn default() -> AssociatedTyDataQuery
fn default() -> AssociatedTyDataQuery
source§impl Query for AssociatedTyDataQuery
impl Query for AssociatedTyDataQuery
§type Key = AssocTypeId<Interner>
type Key = AssocTypeId<Interner>
§type Value = Arc<AssociatedTyDatum<Interner>>
type Value = Arc<AssociatedTyDatum<Interner>>
§type Storage = DerivedStorage<AssociatedTyDataQuery, AlwaysMemoizeValue>
type Storage = DerivedStorage<AssociatedTyDataQuery, AlwaysMemoizeValue>
source§const QUERY_INDEX: u16 = 44u16
const QUERY_INDEX: u16 = 44u16
source§const QUERY_NAME: &'static str = "associated_ty_data"
const QUERY_NAME: &'static str = "associated_ty_data"
foo
)source§fn query_storage<'a>(
group_storage: &'a <AssociatedTyDataQuery as QueryDb<'_>>::GroupStorage
) -> &'a Arc<<AssociatedTyDataQuery as Query>::Storage>
fn query_storage<'a>( group_storage: &'a <AssociatedTyDataQuery as QueryDb<'_>>::GroupStorage ) -> &'a Arc<<AssociatedTyDataQuery as Query>::Storage>
source§fn query_storage_mut<'a>(
group_storage: &'a <AssociatedTyDataQuery as QueryDb<'_>>::GroupStorage
) -> &'a Arc<<AssociatedTyDataQuery as Query>::Storage>
fn query_storage_mut<'a>( group_storage: &'a <AssociatedTyDataQuery as QueryDb<'_>>::GroupStorage ) -> &'a Arc<<AssociatedTyDataQuery as Query>::Storage>
source§impl<'d> QueryDb<'d> for AssociatedTyDataQuery
impl<'d> QueryDb<'d> for AssociatedTyDataQuery
§type DynDb = dyn HirDatabase + 'd
type DynDb = dyn HirDatabase + 'd
§type Group = HirDatabaseStorage
type Group = HirDatabaseStorage
§type GroupStorage = HirDatabaseGroupStorage__
type GroupStorage = HirDatabaseGroupStorage__
Auto Trait Implementations§
impl Freeze for AssociatedTyDataQuery
impl RefUnwindSafe for AssociatedTyDataQuery
impl Send for AssociatedTyDataQuery
impl Sync for AssociatedTyDataQuery
impl Unpin for AssociatedTyDataQuery
impl UnwindSafe for AssociatedTyDataQuery
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> Cast for T
impl<T> Cast for T
source§fn cast<U>(self, interner: <U as HasInterner>::Interner) -> Uwhere
Self: CastTo<U>,
U: HasInterner,
fn cast<U>(self, interner: <U as HasInterner>::Interner) -> Uwhere
Self: CastTo<U>,
U: HasInterner,
U
using CastTo
.