[][src]Function rustc::infer::higher_ranked::fold_regions_in

fn fold_regions_in<'a, 'gcx, 'tcx, T, F>(
    tcx: TyCtxt<'a, 'gcx, 'tcx>,
    unbound_value: &T,
    fldr: F
) -> T where
    T: TypeFoldable<'tcx>,
    F: FnMut(Region<'tcx>, DebruijnIndex) -> Region<'tcx>, 
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?