Struct salsa::QueryTable

pub struct QueryTable<'me, DB, Q> where
    DB: GetQueryTable<Q>,
    Q: Query<DB> + 'me,  { /* fields omitted */ }

Return value from [the query method] on Database. Gives access to various less common operations on queries.

Methods

impl<'me, DB, Q> QueryTable<'me, DB, Q> where
    DB: GetQueryTable<Q>,
    Q: Query<DB> + 'me, 

pub fn new(db: &'me DB, storage: &'me Q::Storage) -> Self

Constructs a new QueryTable.

impl<DB, Q, '_> QueryTable<'_, DB, Q> where
    DB: GetQueryTable<Q>,
    Q: Query<DB>, 

pub fn get(&self, key: Q::Key) -> Q::Value

Execute the query on a given input. Usually it's easier to invoke the trait method directly. Note that for variadic queries (those with no inputs, or those with more than one input) the key will be a tuple.

pub fn sweep(&self, strategy: SweepStrategy) where
    Q::Storage: QueryStorageMassOps<DB>, 

Remove all values for this query that have not been used in the most recent revision.

Trait Implementations

impl<DB, Q, '_> DebugQueryTable for QueryTable<'_, DB, Q> where
    DB: GetQueryTable<Q>,
    Q: Query<DB>, 

type Key = Q::Key

Key of this query.

type Value = Q::Value

Value of this query.

fn is_constant(&self, key: Q::Key) -> bool

True if salsa thinks that the value for key is a constant, meaning that it can never change, no matter what values the inputs take on from this point.

fn entries<C>(&self) -> C where
    C: FromIterator<TableEntry<Self::Key, Self::Value>>, 

Get the (current) set of the entries in the query table.