use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_note, span_lint_and_then};
use clippy_utils::paths;
use clippy_utils::ty::{implements_trait, is_copy};
-use clippy_utils::{get_trait_def_id, is_allowed, is_automatically_derived, match_def_path};
+use clippy_utils::{get_trait_def_id, is_automatically_derived, is_lint_allowed, match_def_path};
use if_chain::if_chain;
-use rustc_hir::def_id::DefId;
-use rustc_hir::intravisit::{walk_expr, walk_fn, walk_item, FnKind, NestedVisitorMap, Visitor};
+use rustc_hir::intravisit::{walk_expr, walk_fn, walk_item, FnKind, Visitor};
use rustc_hir::{
BlockCheckMode, BodyId, Expr, ExprKind, FnDecl, HirId, Impl, Item, ItemKind, TraitRef, UnsafeSource, Unsafety,
};
use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::hir::map::Map;
+use rustc_middle::hir::nested_filter;
use rustc_middle::ty::{self, Ty};
use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::{def_id::LOCAL_CRATE, source_map::Span};
+use rustc_span::source_map::Span;
declare_clippy_lint! {
- /// **What it does:** Checks for deriving `Hash` but implementing `PartialEq`
+ /// ### What it does
+ /// Checks for deriving `Hash` but implementing `PartialEq`
/// explicitly or vice versa.
///
- /// **Why is this bad?** The implementation of these traits must agree (for
+ /// ### Why is this bad?
+ /// The implementation of these traits must agree (for
/// example for use with `HashMap`) so it’s probably a bad idea to use a
/// default-generated `Hash` implementation with an explicitly defined
/// `PartialEq`. In particular, the following must hold for any type:
/// k1 == k2 ⇒ hash(k1) == hash(k2)
/// ```
///
- /// **Known problems:** None.
- ///
- /// **Example:**
+ /// ### Example
/// ```ignore
/// #[derive(Hash)]
/// struct Foo;
/// ...
/// }
/// ```
+ #[clippy::version = "pre 1.29.0"]
pub DERIVE_HASH_XOR_EQ,
correctness,
"deriving `Hash` but implementing `PartialEq` explicitly"
}
declare_clippy_lint! {
- /// **What it does:** Checks for deriving `Ord` but implementing `PartialOrd`
+ /// ### What it does
+ /// Checks for deriving `Ord` but implementing `PartialOrd`
/// explicitly or vice versa.
///
- /// **Why is this bad?** The implementation of these traits must agree (for
+ /// ### Why is this bad?
+ /// The implementation of these traits must agree (for
/// example for use with `sort`) so it’s probably a bad idea to use a
/// default-generated `Ord` implementation with an explicitly defined
/// `PartialOrd`. In particular, the following must hold for any type
/// k1.cmp(&k2) == k1.partial_cmp(&k2).unwrap()
/// ```
///
- /// **Known problems:** None.
- ///
- /// **Example:**
- ///
+ /// ### Example
/// ```rust,ignore
/// #[derive(Ord, PartialEq, Eq)]
/// struct Foo;
/// #[derive(Ord, PartialOrd, PartialEq, Eq)]
/// struct Foo;
/// ```
+ #[clippy::version = "1.47.0"]
pub DERIVE_ORD_XOR_PARTIAL_ORD,
correctness,
"deriving `Ord` but implementing `PartialOrd` explicitly"
}
declare_clippy_lint! {
- /// **What it does:** Checks for explicit `Clone` implementations for `Copy`
+ /// ### What it does
+ /// Checks for explicit `Clone` implementations for `Copy`
/// types.
///
- /// **Why is this bad?** To avoid surprising behaviour, these traits should
+ /// ### Why is this bad?
+ /// To avoid surprising behaviour, these traits should
/// agree and the behaviour of `Copy` cannot be overridden. In almost all
/// situations a `Copy` type should have a `Clone` implementation that does
/// nothing more than copy the object, which is what `#[derive(Copy, Clone)]`
/// gets you.
///
- /// **Known problems:** Bounds of generic types are sometimes wrong: https://github.com/rust-lang/rust/issues/26925
- ///
- /// **Example:**
+ /// ### Example
/// ```rust,ignore
/// #[derive(Copy)]
/// struct Foo;
/// // ..
/// }
/// ```
+ #[clippy::version = "pre 1.29.0"]
pub EXPL_IMPL_CLONE_ON_COPY,
pedantic,
"implementing `Clone` explicitly on `Copy` types"
}
declare_clippy_lint! {
- /// **What it does:** Checks for deriving `serde::Deserialize` on a type that
+ /// ### What it does
+ /// Checks for deriving `serde::Deserialize` on a type that
/// has methods using `unsafe`.
///
- /// **Why is this bad?** Deriving `serde::Deserialize` will create a constructor
+ /// ### Why is this bad?
+ /// Deriving `serde::Deserialize` will create a constructor
/// that may violate invariants hold by another constructor.
///
- /// **Known problems:** None.
- ///
- /// **Example:**
- ///
+ /// ### Example
/// ```rust,ignore
/// use serde::Deserialize;
///
/// }
/// }
/// ```
+ #[clippy::version = "1.45.0"]
pub UNSAFE_DERIVE_DESERIALIZE,
pedantic,
"deriving `serde::Deserialize` on a type that has methods using `unsafe`"
then {
// Look for the PartialEq implementations for `ty`
cx.tcx.for_each_relevant_impl(peq_trait_def_id, ty, |impl_id| {
- let peq_is_automatically_derived = is_automatically_derived(&cx.tcx.get_attrs(impl_id));
+ let peq_is_automatically_derived = is_automatically_derived(cx.tcx.get_attrs(impl_id));
if peq_is_automatically_derived == hash_is_automatically_derived {
return;
then {
// Look for the PartialOrd implementations for `ty`
cx.tcx.for_each_relevant_impl(partial_ord_trait_def_id, ty, |impl_id| {
- let partial_ord_is_automatically_derived = is_automatically_derived(&cx.tcx.get_attrs(impl_id));
+ let partial_ord_is_automatically_derived = is_automatically_derived(cx.tcx.get_attrs(impl_id));
if partial_ord_is_automatically_derived == ord_is_automatically_derived {
return;
// there's a Copy impl for any instance of the adt.
if !is_copy(cx, ty) {
if ty_subs.non_erasable_generics().next().is_some() {
- let has_copy_impl = cx
- .tcx
- .all_local_trait_impls(LOCAL_CRATE)
- .get(©_id)
- .map_or(false, |impls| {
- impls
- .iter()
- .any(|&id| matches!(cx.tcx.type_of(id).kind(), ty::Adt(adt, _) if ty_adt.did == adt.did))
- });
+ let has_copy_impl = cx.tcx.all_local_trait_impls(()).get(©_id).map_or(false, |impls| {
+ impls
+ .iter()
+ .any(|&id| matches!(cx.tcx.type_of(id).kind(), ty::Adt(adt, _) if ty_adt.did == adt.did))
+ });
if !has_copy_impl {
return;
}
trait_ref: &TraitRef<'_>,
ty: Ty<'tcx>,
) {
- fn item_from_def_id<'tcx>(cx: &LateContext<'tcx>, def_id: DefId) -> &'tcx Item<'tcx> {
- let hir_id = cx.tcx.hir().local_def_id_to_hir_id(def_id.expect_local());
- cx.tcx.hir().expect_item(hir_id)
- }
-
fn has_unsafe<'tcx>(cx: &LateContext<'tcx>, item: &'tcx Item<'_>) -> bool {
let mut visitor = UnsafeVisitor { cx, has_unsafe: false };
walk_item(&mut visitor, item);
if let ty::Adt(def, _) = ty.kind();
if let Some(local_def_id) = def.did.as_local();
let adt_hir_id = cx.tcx.hir().local_def_id_to_hir_id(local_def_id);
- if !is_allowed(cx, UNSAFE_DERIVE_DESERIALIZE, adt_hir_id);
+ if !is_lint_allowed(cx, UNSAFE_DERIVE_DESERIALIZE, adt_hir_id);
if cx.tcx.inherent_impls(def.did)
.iter()
- .map(|imp_did| item_from_def_id(cx, *imp_did))
+ .map(|imp_did| cx.tcx.hir().expect_item(imp_did.expect_local()))
.any(|imp| has_unsafe(cx, imp));
then {
span_lint_and_help(
}
impl<'tcx> Visitor<'tcx> for UnsafeVisitor<'_, 'tcx> {
- type Map = Map<'tcx>;
+ type NestedFilter = nested_filter::All;
fn visit_fn(&mut self, kind: FnKind<'tcx>, decl: &'tcx FnDecl<'_>, body_id: BodyId, span: Span, id: HirId) {
if self.has_unsafe {
if_chain! {
if let Some(header) = kind.header();
- if let Unsafety::Unsafe = header.unsafety;
+ if header.unsafety == Unsafety::Unsafe;
then {
self.has_unsafe = true;
}
}
if let ExprKind::Block(block, _) = expr.kind {
- match block.rules {
- BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided)
- | BlockCheckMode::PushUnsafeBlock(UnsafeSource::UserProvided)
- | BlockCheckMode::PopUnsafeBlock(UnsafeSource::UserProvided) => {
- self.has_unsafe = true;
- },
- _ => {},
+ if block.rules == BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided) {
+ self.has_unsafe = true;
}
}
walk_expr(self, expr);
}
- fn nested_visit_map(&mut self) -> NestedVisitorMap<Self::Map> {
- NestedVisitorMap::All(self.cx.tcx.hir())
+ fn nested_visit_map(&mut self) -> Self::Map {
+ self.cx.tcx.hir()
}
}
projects / rust.git / blobdiff