[][src]Function rustc_mir::borrow_check::nll::type_check::relate_tys::relate_type_and_user_type

pub(super) fn relate_type_and_user_type<'tcx>(
    infcx: &InferCtxt<'_, '_, 'tcx>,
    a: Ty<'tcx>,
    v: Variance,
    b: CanonicalTy<'tcx>,
    locations: Locations,
    borrowck_context: Option<&mut BorrowCheckContext<'_, 'tcx>>
) -> Fallible<()>
🔬 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?

Adds sufficient constraints to ensure that a <: b, where b is a user-given type (which means it may have canonical variables encoding things like _).