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Diffstat (limited to '')
-rw-r--r-- | compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs new file mode 100644 index 000000000..e92ca7325 --- /dev/null +++ b/compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs @@ -0,0 +1,68 @@ +use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse}; +use crate::traits::query::Fallible; +use rustc_middle::ty::fold::TypeFoldable; +use rustc_middle::ty::{self, Lift, ParamEnvAnd, Ty, TyCtxt}; +use std::fmt; + +pub use rustc_middle::traits::query::type_op::Normalize; + +impl<'tcx, T> super::QueryTypeOp<'tcx> for Normalize<T> +where + T: Normalizable<'tcx> + 'tcx, +{ + type QueryResponse = T; + + fn try_fast_path(_tcx: TyCtxt<'tcx>, key: &ParamEnvAnd<'tcx, Self>) -> Option<T> { + if !key.value.value.has_projections() { Some(key.value.value) } else { None } + } + + fn perform_query( + tcx: TyCtxt<'tcx>, + canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>, + ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self::QueryResponse>> { + T::type_op_method(tcx, canonicalized) + } +} + +pub trait Normalizable<'tcx>: fmt::Debug + TypeFoldable<'tcx> + Lift<'tcx> + Copy { + fn type_op_method( + tcx: TyCtxt<'tcx>, + canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>, + ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>>; +} + +impl<'tcx> Normalizable<'tcx> for Ty<'tcx> { + fn type_op_method( + tcx: TyCtxt<'tcx>, + canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>, + ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> { + tcx.type_op_normalize_ty(canonicalized) + } +} + +impl<'tcx> Normalizable<'tcx> for ty::Predicate<'tcx> { + fn type_op_method( + tcx: TyCtxt<'tcx>, + canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>, + ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> { + tcx.type_op_normalize_predicate(canonicalized) + } +} + +impl<'tcx> Normalizable<'tcx> for ty::PolyFnSig<'tcx> { + fn type_op_method( + tcx: TyCtxt<'tcx>, + canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>, + ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> { + tcx.type_op_normalize_poly_fn_sig(canonicalized) + } +} + +impl<'tcx> Normalizable<'tcx> for ty::FnSig<'tcx> { + fn type_op_method( + tcx: TyCtxt<'tcx>, + canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>, + ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> { + tcx.type_op_normalize_fn_sig(canonicalized) + } +} |