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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)
}
}
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