Function rustc_query_system::query::get_query_incr

pub fn get_query_incr<Q, Qcx>(
    query: Q,
    qcx: Qcx,
    span: Span,
    key: Q::Key,
    mode: QueryMode
) -> Option<Q::Value>where
    Q: QueryConfig<Qcx>,
    Qcx: QueryContext,