Function rustc_middle::ty::tls::with_opt

source · 
pub fn with_opt<F, R>(f: F) -> R
where
    F: for<'tcx> FnOnce(Option<TyCtxt<'tcx>>) -> R,
Expand description

Allows access to the TyCtxt in the current ImplicitCtxt. The closure is passed None if there is no ImplicitCtxt available.