69 lines
2.2 KiB
Rust
69 lines
2.2 KiB
Rust
use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
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use crate::traits::query::Fallible;
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use rustc::ty::fold::TypeFoldable;
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use rustc::ty::{self, Lift, ParamEnvAnd, Ty, TyCtxt};
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use std::fmt;
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pub use rustc::traits::query::type_op::Normalize;
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impl<'tcx, T> super::QueryTypeOp<'tcx> for Normalize<T>
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where
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T: Normalizable<'tcx> + 'tcx,
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{
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type QueryResponse = T;
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fn try_fast_path(_tcx: TyCtxt<'tcx>, key: &ParamEnvAnd<'tcx, Self>) -> Option<T> {
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if !key.value.value.has_projections() { Some(key.value.value) } else { None }
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}
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fn perform_query(
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tcx: TyCtxt<'tcx>,
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canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
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) -> Fallible<CanonicalizedQueryResponse<'tcx, Self::QueryResponse>> {
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T::type_op_method(tcx, canonicalized)
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}
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}
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pub trait Normalizable<'tcx>: fmt::Debug + TypeFoldable<'tcx> + Lift<'tcx> + Copy {
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fn type_op_method(
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tcx: TyCtxt<'tcx>,
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canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
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) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>>;
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}
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impl Normalizable<'tcx> for Ty<'tcx> {
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fn type_op_method(
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tcx: TyCtxt<'tcx>,
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canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
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) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
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tcx.type_op_normalize_ty(canonicalized)
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}
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}
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impl Normalizable<'tcx> for ty::Predicate<'tcx> {
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fn type_op_method(
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tcx: TyCtxt<'tcx>,
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canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
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) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
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tcx.type_op_normalize_predicate(canonicalized)
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}
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}
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impl Normalizable<'tcx> for ty::PolyFnSig<'tcx> {
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fn type_op_method(
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tcx: TyCtxt<'tcx>,
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canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
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) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
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tcx.type_op_normalize_poly_fn_sig(canonicalized)
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}
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}
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impl Normalizable<'tcx> for ty::FnSig<'tcx> {
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fn type_op_method(
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tcx: TyCtxt<'tcx>,
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canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
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) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
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tcx.type_op_normalize_fn_sig(canonicalized)
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}
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}
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