| use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse}; |
| use crate::traits::query::Fallible; |
| use rustc::ty::fold::TypeFoldable; |
| use rustc::ty::{self, Lift, ParamEnvAnd, Ty, TyCtxt}; |
| use std::fmt; |
| |
| pub use rustc::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 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 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 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 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) |
| } |
| } |