use rustc_middle::hir::nested_filter;
use rustc_middle::traits::Reveal;
use rustc_middle::ty::{
- self, Binder, BoundConstness, GenericParamDefKind, ImplPolarity, ParamEnv, PredicateKind, TraitPredicate, TraitRef,
- Ty, TyCtxt,
+ self, Binder, BoundConstness, Clause, GenericArgKind, GenericParamDefKind, ImplPolarity, ParamEnv, PredicateKind,
+ TraitPredicate, Ty, TyCtxt,
};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::source_map::Span;
/// }
/// ```
#[clippy::version = "pre 1.29.0"]
- pub DERIVE_HASH_XOR_EQ,
+ pub DERIVED_HASH_WITH_MANUAL_EQ,
correctness,
"deriving `Hash` but implementing `PartialEq` explicitly"
}
/// ```
#[clippy::version = "1.63.0"]
pub DERIVE_PARTIAL_EQ_WITHOUT_EQ,
- style,
+ nursery,
"deriving `PartialEq` on a type that can implement `Eq`, without implementing `Eq`"
}
declare_lint_pass!(Derive => [
EXPL_IMPL_CLONE_ON_COPY,
- DERIVE_HASH_XOR_EQ,
+ DERIVED_HASH_WITH_MANUAL_EQ,
DERIVE_ORD_XOR_PARTIAL_ORD,
UNSAFE_DERIVE_DESERIALIZE,
DERIVE_PARTIAL_EQ_WITHOUT_EQ
..
}) = item.kind
{
- let ty = cx.tcx.type_of(item.def_id);
- let is_automatically_derived = cx.tcx.has_attr(item.def_id.to_def_id(), sym::automatically_derived);
+ let ty = cx.tcx.type_of(item.owner_id);
+ let is_automatically_derived = cx.tcx.has_attr(item.owner_id.to_def_id(), sym::automatically_derived);
check_hash_peq(cx, item.span, trait_ref, ty, is_automatically_derived);
check_ord_partial_ord(cx, item.span, trait_ref, ty, is_automatically_derived);
}
}
-/// Implementation of the `DERIVE_HASH_XOR_EQ` lint.
+/// Implementation of the `DERIVED_HASH_WITH_MANUAL_EQ` lint.
fn check_hash_peq<'tcx>(
cx: &LateContext<'tcx>,
span: Span,
cx.tcx.for_each_relevant_impl(peq_trait_def_id, ty, |impl_id| {
let peq_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived);
- if peq_is_automatically_derived == hash_is_automatically_derived {
+ if !hash_is_automatically_derived || peq_is_automatically_derived {
return;
}
- let trait_ref = cx.tcx.impl_trait_ref(impl_id).expect("must be a trait implementation");
+ let trait_ref = cx.tcx.bound_impl_trait_ref(impl_id).expect("must be a trait implementation");
// Only care about `impl PartialEq<Foo> for Foo`
// For `impl PartialEq<B> for A, input_types is [A, B]
- if trait_ref.substs.type_at(1) == ty {
- let mess = if peq_is_automatically_derived {
- "you are implementing `Hash` explicitly but have derived `PartialEq`"
- } else {
- "you are deriving `Hash` but have implemented `PartialEq` explicitly"
- };
-
+ if trait_ref.subst_identity().substs.type_at(1) == ty {
span_lint_and_then(
cx,
- DERIVE_HASH_XOR_EQ,
+ DERIVED_HASH_WITH_MANUAL_EQ,
span,
- mess,
+ "you are deriving `Hash` but have implemented `PartialEq` explicitly",
|diag| {
if let Some(local_def_id) = impl_id.as_local() {
let hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_def_id);
return;
}
- let trait_ref = cx.tcx.impl_trait_ref(impl_id).expect("must be a trait implementation");
+ let trait_ref = cx.tcx.bound_impl_trait_ref(impl_id).expect("must be a trait implementation");
// Only care about `impl PartialOrd<Foo> for Foo`
// For `impl PartialOrd<B> for A, input_types is [A, B]
- if trait_ref.substs.type_at(1) == ty {
+ if trait_ref.subst_identity().substs.type_at(1) == ty {
let mess = if partial_ord_is_automatically_derived {
"you are implementing `Ord` explicitly but have derived `PartialOrd`"
} else {
Some(id) if trait_ref.trait_def_id() == Some(id) => id,
_ => return,
};
- let copy_id = match cx.tcx.lang_items().copy_trait() {
- Some(id) => id,
- None => return,
- };
+ let Some(copy_id) = cx.tcx.lang_items().copy_trait() else { return };
let (ty_adt, ty_subs) = match *ty.kind() {
// Unions can't derive clone.
ty::Adt(adt, subs) if !adt.is_union() => (adt, subs),
if ty_subs.types().any(|ty| !implements_trait(cx, ty, clone_id, &[])) {
return;
}
+ // `#[repr(packed)]` structs with type/const parameters can't derive `Clone`.
+ // https://github.com/rust-lang/rust-clippy/issues/10188
+ if ty_adt.repr().packed()
+ && ty_subs
+ .iter()
+ .any(|arg| matches!(arg.unpack(), GenericArgKind::Type(_) | GenericArgKind::Const(_)))
+ {
+ return;
+ }
span_lint_and_note(
cx,
if let Some(def_id) = trait_ref.trait_def_id();
if cx.tcx.is_diagnostic_item(sym::PartialEq, def_id);
let param_env = param_env_for_derived_eq(cx.tcx, adt.did(), eq_trait_def_id);
- if !implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, &[]);
+ if !implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, []);
// If all of our fields implement `Eq`, we can implement `Eq` too
if adt
.all_fields()
.map(|f| f.ty(cx.tcx, substs))
- .all(|ty| implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, &[]));
+ .all(|ty| implements_trait_with_env(cx.tcx, param_env, ty, eq_trait_def_id, []));
then {
span_lint_and_sugg(
cx,
let ty_predicates = tcx.predicates_of(did).predicates;
for (p, _) in ty_predicates {
- if let PredicateKind::Trait(p) = p.kind().skip_binder()
+ if let PredicateKind::Clause(Clause::Trait(p)) = p.kind().skip_binder()
&& p.trait_ref.def_id == eq_trait_id
&& let ty::Param(self_ty) = p.trait_ref.self_ty().kind()
&& p.constness == BoundConstness::NotConst
ParamEnv::new(
tcx.mk_predicates(ty_predicates.iter().map(|&(p, _)| p).chain(
params.iter().filter(|&&(_, needs_eq)| needs_eq).map(|&(param, _)| {
- tcx.mk_predicate(Binder::dummy(PredicateKind::Trait(TraitPredicate {
- trait_ref: TraitRef::new(
- eq_trait_id,
- tcx.mk_substs(std::iter::once(tcx.mk_param_from_def(param))),
- ),
+ tcx.mk_predicate(Binder::dummy(PredicateKind::Clause(Clause::Trait(TraitPredicate {
+ trait_ref: tcx.mk_trait_ref(eq_trait_id, [tcx.mk_param_from_def(param)]),
constness: BoundConstness::NotConst,
polarity: ImplPolarity::Positive,
- })))
+ }))))
}),
)),
Reveal::UserFacing,
projects / rust.git / blobdiff