Function rustc_query_system::query::plumbing::try_execute_query

fn try_execute_query<CTX, C>(
    tcx: CTX, 
    state: &QueryState<CTX::DepKind, C::Key>, 
    cache: &QueryCacheStore<C>, 
    span: Span, 
    key: C::Key, 
    lookup: QueryLookup, 
    dep_node: Option<DepNode<CTX::DepKind>>, 
    query: &QueryVtable<CTX, C::Key, C::Value>
) -> (C::Stored, Option<DepNodeIndex>) where
    C: QueryCache,
    C::Key: Clone + DepNodeParams<CTX::DepContext>,
    CTX: QueryContext,