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Rollup merge of #124957 - compiler-errors:builtin-deref, r=michaelwoerister

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Make `Ty::builtin_deref` just return a `Ty`

Nowhere in the compiler are we using the mutability part of the `TyAndMut` that we used to return.
This commit is contained in:
Matthias Krüger 2024-05-10 16:10:47 +02:00 committed by GitHub
commit 44c29bd7d1
3 changed files with 6 additions and 6 deletions
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8
clippy_lints/src/matches/significant_drop_in_scrutinee.rs
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@ -6,7 +6,7 @@ use rustc_errors::{Applicability, Diag};
use rustc_hir::intravisit::{walk_expr, Visitor};
use rustc_hir::{Arm, Expr, ExprKind, MatchSource};
use rustc_lint::{LateContext, LintContext};
use rustc_middle::ty::{GenericArgKind, Ty, TypeAndMut};
use rustc_middle::ty::{GenericArgKind, Ty};
use rustc_span::Span;
use super::SIGNIFICANT_DROP_IN_SCRUTINEE;
@ -234,9 +234,9 @@ impl<'a, 'tcx> SigDropHelper<'a, 'tcx> {
}
let ty = self.sig_drop_checker.get_type(expr);
if ty.is_ref() {
// We checked that the type was ref, so builtin_deref will return Some TypeAndMut,
// but let's avoid any chance of an ICE
if let Some(TypeAndMut { ty, .. }) = ty.builtin_deref(true) {
// We checked that the type was ref, so builtin_deref will return Some,
// but let's avoid any chance of an ICE.
if let Some(ty) = ty.builtin_deref(true) {
if ty.is_trivially_pure_clone_copy() {
self.replace_current_sig_drop(expr.span, false, LintSuggestion::MoveAndDerefToCopy);
} else if allow_move_and_clone {

2
clippy_lints/src/operators/cmp_owned.rs
View File

@ -70,7 +70,7 @@ fn check_op(cx: &LateContext<'_>, expr: &Expr<'_>, other: &Expr<'_>, left: bool)
let without_deref = symmetric_partial_eq(cx, arg_ty, other_ty).unwrap_or_default();
let with_deref = arg_ty
.builtin_deref(true)
.and_then(|tam| symmetric_partial_eq(cx, tam.ty, other_ty))
.and_then(|ty| symmetric_partial_eq(cx, ty, other_ty))
.unwrap_or_default();
if !with_deref.is_implemented() && !without_deref.is_implemented() {

2
clippy_utils/src/qualify_min_const_fn.rs
View File

@ -134,7 +134,7 @@ fn check_rvalue<'tcx>(
) => Err((span, "function pointer casts are not allowed in const fn".into())),
Rvalue::Cast(CastKind::PointerCoercion(PointerCoercion::Unsize), op, cast_ty) => {
let pointee_ty = if let Some(deref_ty) = cast_ty.builtin_deref(true) {
deref_ty.ty
deref_ty
} else {
// We cannot allow this for now.
return Err((span, "unsizing casts are only allowed for references right now".into()));