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Auto merge of #80679 - jackh726:predicate-kind-take2, r=lcnr

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Remove PredicateKind and instead only use Binder<PredicateAtom>

Originally brought up in https://github.com/rust-lang/rust/pull/76814#discussion_r546858171

r? `@lcnr`
This commit is contained in:
bors 2021-01-17 20:49:11 +00:00
commit e477105405
6 changed files with 24 additions and 26 deletions
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4
clippy_lints/src/future_not_send.rs
View File

@ -4,7 +4,7 @@ use rustc_hir::{Body, FnDecl, HirId};
use rustc_infer::infer::TyCtxtInferExt;
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::ty::subst::Subst;
use rustc_middle::ty::{Opaque, PredicateAtom::Trait};
use rustc_middle::ty::{Opaque, PredicateKind::Trait};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::{sym, Span};
use rustc_trait_selection::traits::error_reporting::suggestions::InferCtxtExt;
@ -97,7 +97,7 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend {
&obligation,
);
if let Trait(trait_pred, _) =
obligation.predicate.skip_binders()
obligation.predicate.kind().skip_binder()
{
db.note(&format!(
"`{}` doesn't implement `{}`",

2
clippy_lints/src/methods/mod.rs
View File

@ -1697,7 +1697,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods {
if let ty::Opaque(def_id, _) = *ret_ty.kind() {
// one of the associated types must be Self
for &(predicate, _span) in cx.tcx.explicit_item_bounds(def_id) {
if let ty::PredicateAtom::Projection(projection_predicate) = predicate.skip_binders() {
if let ty::PredicateKind::Projection(projection_predicate) = predicate.kind().skip_binder() {
// walk the associated type and check for Self
if contains_ty(projection_predicate.ty, self_ty) {
return;

12
clippy_lints/src/needless_pass_by_value.rs
View File

@ -115,13 +115,11 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue {
.filter(|p| !p.is_global())
.filter_map(|obligation| {
// Note that we do not want to deal with qualified predicates here.
if let ty::PredicateKind::Atom(ty::PredicateAtom::Trait(pred, _)) = obligation.predicate.kind() {
if pred.def_id() == sized_trait {
return None;
}
Some(pred)
} else {
None
match obligation.predicate.kind().no_bound_vars() {
Some(ty::PredicateKind::Trait(pred, _)) if pred.def_id() != sized_trait => {
Some(pred)
},
_ => None,
}
})
.collect::<Vec<_>>();

6
clippy_lints/src/unit_return_expecting_ord.rs
View File

@ -4,7 +4,7 @@ use rustc_hir::def_id::DefId;
use rustc_hir::{Expr, ExprKind, StmtKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::ty;
use rustc_middle::ty::{GenericPredicates, PredicateAtom, ProjectionPredicate, TraitPredicate};
use rustc_middle::ty::{GenericPredicates, PredicateKind, ProjectionPredicate, TraitPredicate};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::{BytePos, Span};
@ -42,7 +42,7 @@ fn get_trait_predicates_for_trait_id<'tcx>(
let mut preds = Vec::new();
for (pred, _) in generics.predicates {
if_chain! {
if let PredicateAtom::Trait(poly_trait_pred, _) = pred.skip_binders();
if let PredicateKind::Trait(poly_trait_pred, _) = pred.kind().skip_binder();
let trait_pred = cx.tcx.erase_late_bound_regions(ty::Binder::bind(poly_trait_pred));
if let Some(trait_def_id) = trait_id;
if trait_def_id == trait_pred.trait_ref.def_id;
@ -60,7 +60,7 @@ fn get_projection_pred<'tcx>(
pred: TraitPredicate<'tcx>,
) -> Option<ProjectionPredicate<'tcx>> {
generics.predicates.iter().find_map(|(proj_pred, _)| {
if let ty::PredicateAtom::Projection(proj_pred) = proj_pred.skip_binders() {
if let ty::PredicateKind::Projection(proj_pred) = proj_pred.kind().skip_binder() {
let projection_pred = cx.tcx.erase_late_bound_regions(ty::Binder::bind(proj_pred));
if projection_pred.projection_ty.substs == pred.trait_ref.substs {
return Some(projection_pred);

2
clippy_lints/src/utils/mod.rs
View File

@ -1470,7 +1470,7 @@ pub fn is_must_use_ty<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool {
ty::Tuple(ref substs) => substs.types().any(|ty| is_must_use_ty(cx, ty)),
ty::Opaque(ref def_id, _) => {
for (predicate, _) in cx.tcx.explicit_item_bounds(*def_id) {
if let ty::PredicateAtom::Trait(trait_predicate, _) = predicate.skip_binders() {
if let ty::PredicateKind::Trait(trait_predicate, _) = predicate.kind().skip_binder() {
if must_use_attr(&cx.tcx.get_attrs(trait_predicate.trait_ref.def_id)).is_some() {
return true;
}

24
clippy_lints/src/utils/qualify_min_const_fn.rs
View File

@ -19,18 +19,18 @@ pub fn is_min_const_fn(tcx: TyCtxt<'tcx>, body: &'a Body<'tcx>) -> McfResult {
loop {
let predicates = tcx.predicates_of(current);
for (predicate, _) in predicates.predicates {
match predicate.skip_binders() {
ty::PredicateAtom::RegionOutlives(_)
| ty::PredicateAtom::TypeOutlives(_)
| ty::PredicateAtom::WellFormed(_)
| ty::PredicateAtom::Projection(_)
| ty::PredicateAtom::ConstEvaluatable(..)
| ty::PredicateAtom::ConstEquate(..)
| ty::PredicateAtom::TypeWellFormedFromEnv(..) => continue,
ty::PredicateAtom::ObjectSafe(_) => panic!("object safe predicate on function: {:#?}", predicate),
ty::PredicateAtom::ClosureKind(..) => panic!("closure kind predicate on function: {:#?}", predicate),
ty::PredicateAtom::Subtype(_) => panic!("subtype predicate on function: {:#?}", predicate),
ty::PredicateAtom::Trait(pred, _) => {
match predicate.kind().skip_binder() {
ty::PredicateKind::RegionOutlives(_)
| ty::PredicateKind::TypeOutlives(_)
| ty::PredicateKind::WellFormed(_)
| ty::PredicateKind::Projection(_)
| ty::PredicateKind::ConstEvaluatable(..)
| ty::PredicateKind::ConstEquate(..)
| ty::PredicateKind::TypeWellFormedFromEnv(..) => continue,
ty::PredicateKind::ObjectSafe(_) => panic!("object safe predicate on function: {:#?}", predicate),
ty::PredicateKind::ClosureKind(..) => panic!("closure kind predicate on function: {:#?}", predicate),
ty::PredicateKind::Subtype(_) => panic!("subtype predicate on function: {:#?}", predicate),
ty::PredicateKind::Trait(pred, _) => {
if Some(pred.def_id()) == tcx.lang_items().sized_trait() {
continue;
}