diff --git a/clippy_lints/src/arc_with_non_send_sync.rs b/clippy_lints/src/arc_with_non_send_sync.rs index d57ab539fff42..4eafa330fafab 100644 --- a/clippy_lints/src/arc_with_non_send_sync.rs +++ b/clippy_lints/src/arc_with_non_send_sync.rs @@ -1,7 +1,7 @@ use clippy_utils::diagnostics::span_lint_and_then; +use clippy_utils::is_from_proc_macro; use clippy_utils::ty::{implements_trait, is_type_diagnostic_item}; -use clippy_utils::{is_from_proc_macro, last_path_segment}; -use rustc_hir::{Expr, ExprKind}; +use rustc_hir::{Expr, ExprKind, QPath}; use rustc_lint::{LateContext, LateLintPass}; use rustc_middle::ty; use rustc_middle::ty::print::with_forced_trimmed_paths; @@ -42,12 +42,11 @@ declare_lint_pass!(ArcWithNonSendSync => [ARC_WITH_NON_SEND_SYNC]); impl<'tcx> LateLintPass<'tcx> for ArcWithNonSendSync { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) { - if !expr.span.from_expansion() - && let ty = cx.typeck_results().expr_ty(expr) - && is_type_diagnostic_item(cx, ty, sym::Arc) - && let ExprKind::Call(func, [arg]) = expr.kind - && let ExprKind::Path(func_path) = func.kind - && last_path_segment(&func_path).ident.name == sym::new + if let ExprKind::Call(func, [arg]) = expr.kind + && let ExprKind::Path(QPath::TypeRelative(func_ty, func_name)) = func.kind + && func_name.ident.name == sym::new + && !expr.span.from_expansion() + && is_type_diagnostic_item(cx, cx.typeck_results().node_type(func_ty.hir_id), sym::Arc) && let arg_ty = cx.typeck_results().expr_ty(arg) // make sure that the type is not and does not contain any type parameters && arg_ty.walk().all(|arg| { diff --git a/clippy_lints/src/borrow_deref_ref.rs b/clippy_lints/src/borrow_deref_ref.rs index 0ca4a0e067d36..bd123a725a736 100644 --- a/clippy_lints/src/borrow_deref_ref.rs +++ b/clippy_lints/src/borrow_deref_ref.rs @@ -49,35 +49,31 @@ declare_lint_pass!(BorrowDerefRef => [BORROW_DEREF_REF]); impl<'tcx> LateLintPass<'tcx> for BorrowDerefRef { fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &rustc_hir::Expr<'tcx>) { - if !e.span.from_expansion() - && let ExprKind::AddrOf(_, Mutability::Not, addrof_target) = e.kind - && !addrof_target.span.from_expansion() + if let ExprKind::AddrOf(_, Mutability::Not, addrof_target) = e.kind && let ExprKind::Unary(UnOp::Deref, deref_target) = addrof_target.kind - && !deref_target.span.from_expansion() && !matches!(deref_target.kind, ExprKind::Unary(UnOp::Deref, ..)) + && !e.span.from_expansion() + && !deref_target.span.from_expansion() + && !addrof_target.span.from_expansion() && let ref_ty = cx.typeck_results().expr_ty(deref_target) && let ty::Ref(_, inner_ty, Mutability::Not) = ref_ty.kind() - { - if let Some(parent_expr) = get_parent_expr(cx, e) { - if matches!(parent_expr.kind, ExprKind::Unary(UnOp::Deref, ..)) - && !is_lint_allowed(cx, DEREF_ADDROF, parent_expr.hir_id) - { - return; + && get_parent_expr(cx, e).map_or(true, |parent| { + match parent.kind { + // `*&*foo` should lint `deref_addrof` instead. + ExprKind::Unary(UnOp::Deref, _) => is_lint_allowed(cx, DEREF_ADDROF, parent.hir_id), + // `&*foo` creates a distinct temporary from `foo` + ExprKind::AddrOf(_, Mutability::Mut, _) => !matches!( + deref_target.kind, + ExprKind::Path(..) + | ExprKind::Field(..) + | ExprKind::Index(..) + | ExprKind::Unary(UnOp::Deref, ..) + ), + _ => true, } - - // modification to `&mut &*x` is different from `&mut x` - if matches!( - deref_target.kind, - ExprKind::Path(..) | ExprKind::Field(..) | ExprKind::Index(..) | ExprKind::Unary(UnOp::Deref, ..) - ) && matches!(parent_expr.kind, ExprKind::AddrOf(_, Mutability::Mut, _)) - { - return; - } - } - if is_from_proc_macro(cx, e) { - return; - } - + }) + && !is_from_proc_macro(cx, e) + { span_lint_and_then( cx, BORROW_DEREF_REF, diff --git a/clippy_lints/src/collapsible_if.rs b/clippy_lints/src/collapsible_if.rs index 07b02c98df151..f311c052ad6ee 100644 --- a/clippy_lints/src/collapsible_if.rs +++ b/clippy_lints/src/collapsible_if.rs @@ -93,20 +93,14 @@ declare_lint_pass!(CollapsibleIf => [COLLAPSIBLE_IF, COLLAPSIBLE_ELSE_IF]); impl EarlyLintPass for CollapsibleIf { fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &ast::Expr) { - if !expr.span.from_expansion() { - check_if(cx, expr); - } - } -} - -fn check_if(cx: &EarlyContext<'_>, expr: &ast::Expr) { - if let ast::ExprKind::If(check, then, else_) = &expr.kind { - if let Some(else_) = else_ { - check_collapsible_maybe_if_let(cx, then.span, else_); - } else if let ast::ExprKind::Let(..) = check.kind { - // Prevent triggering on `if let a = b { if c { .. } }`. - } else { - check_collapsible_no_if_let(cx, expr, check, then); + if let ast::ExprKind::If(cond, then, else_) = &expr.kind + && !expr.span.from_expansion() + { + if let Some(else_) = else_ { + check_collapsible_maybe_if_let(cx, then.span, else_); + } else if !matches!(cond.kind, ast::ExprKind::Let(..)) { + check_collapsible_no_if_let(cx, expr, cond, then); + } } } } @@ -189,13 +183,10 @@ fn check_collapsible_no_if_let(cx: &EarlyContext<'_>, expr: &ast::Expr, check: & /// If the block contains only one expression, return it. fn expr_block(block: &ast::Block) -> Option<&ast::Expr> { - let mut it = block.stmts.iter(); - - if let (Some(stmt), None) = (it.next(), it.next()) { - match stmt.kind { - ast::StmtKind::Expr(ref expr) | ast::StmtKind::Semi(ref expr) => Some(expr), - _ => None, - } + if let [stmt] = &*block.stmts + && let ast::StmtKind::Expr(expr) | ast::StmtKind::Semi(expr) = &stmt.kind + { + Some(expr) } else { None } diff --git a/clippy_lints/src/collection_is_never_read.rs b/clippy_lints/src/collection_is_never_read.rs index 28d9f68d504cc..eebda3ff76fd9 100644 --- a/clippy_lints/src/collection_is_never_read.rs +++ b/clippy_lints/src/collection_is_never_read.rs @@ -59,9 +59,9 @@ static COLLECTIONS: [Symbol; 9] = [ impl<'tcx> LateLintPass<'tcx> for CollectionIsNeverRead { fn check_local(&mut self, cx: &LateContext<'tcx>, local: &'tcx LetStmt<'tcx>) { - // Look for local variables whose type is a container. Search surrounding bock for read access. - if match_acceptable_type(cx, local, &COLLECTIONS) - && let PatKind::Binding(_, local_id, _, _) = local.pat.kind + // Look for local variables whose type is a container. Search surrounding block for read access. + if let PatKind::Binding(_, local_id, _, _) = local.pat.kind + && match_acceptable_type(cx, local, &COLLECTIONS) && let Some(enclosing_block) = get_enclosing_block(cx, local.hir_id) && has_no_read_access(cx, local_id, enclosing_block) { diff --git a/clippy_lints/src/crate_in_macro_def.rs b/clippy_lints/src/crate_in_macro_def.rs index adf6f7c473757..678bdbc0ffb8a 100644 --- a/clippy_lints/src/crate_in_macro_def.rs +++ b/clippy_lints/src/crate_in_macro_def.rs @@ -53,10 +53,9 @@ declare_lint_pass!(CrateInMacroDef => [CRATE_IN_MACRO_DEF]); impl EarlyLintPass for CrateInMacroDef { fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) { - if item.attrs.iter().any(is_macro_export) - && let ItemKind::MacroDef(macro_def) = &item.kind - && let tts = macro_def.body.tokens.clone() - && let Some(span) = contains_unhygienic_crate_reference(&tts) + if let ItemKind::MacroDef(macro_def) = &item.kind + && item.attrs.iter().any(is_macro_export) + && let Some(span) = contains_unhygienic_crate_reference(¯o_def.body.tokens) { span_lint_and_sugg( cx, diff --git a/clippy_lints/src/else_if_without_else.rs b/clippy_lints/src/else_if_without_else.rs index bb6f9aac22363..7a6dc46972767 100644 --- a/clippy_lints/src/else_if_without_else.rs +++ b/clippy_lints/src/else_if_without_else.rs @@ -50,12 +50,9 @@ declare_lint_pass!(ElseIfWithoutElse => [ELSE_IF_WITHOUT_ELSE]); impl EarlyLintPass for ElseIfWithoutElse { fn check_expr(&mut self, cx: &EarlyContext<'_>, item: &Expr) { - if in_external_macro(cx.sess(), item.span) { - return; - } - if let ExprKind::If(_, _, Some(ref els)) = item.kind && let ExprKind::If(_, _, None) = els.kind + && !in_external_macro(cx.sess(), item.span) { span_lint_and_help( cx, diff --git a/clippy_lints/src/empty_enum.rs b/clippy_lints/src/empty_enum.rs index d16714695cb7e..1869faab1d326 100644 --- a/clippy_lints/src/empty_enum.rs +++ b/clippy_lints/src/empty_enum.rs @@ -64,25 +64,21 @@ declare_lint_pass!(EmptyEnum => [EMPTY_ENUM]); impl<'tcx> LateLintPass<'tcx> for EmptyEnum { fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) { - // Only suggest the `never_type` if the feature is enabled - if !cx.tcx.features().never_type { - return; - } - - if let ItemKind::Enum(..) = item.kind { - let ty = cx.tcx.type_of(item.owner_id).instantiate_identity(); - let adt = ty.ty_adt_def().expect("already checked whether this is an enum"); - if adt.variants().is_empty() { - span_lint_and_help( - cx, - EMPTY_ENUM, - item.span, - "enum with no variants", - None, - "consider using the uninhabited type `!` (never type) or a wrapper \ - around it to introduce a type which can't be instantiated", - ); - } + if let ItemKind::Enum(..) = item.kind + // Only suggest the `never_type` if the feature is enabled + && cx.tcx.features().never_type + && let Some(adt) = cx.tcx.type_of(item.owner_id).instantiate_identity().ty_adt_def() + && adt.variants().is_empty() + { + span_lint_and_help( + cx, + EMPTY_ENUM, + item.span, + "enum with no variants", + None, + "consider using the uninhabited type `!` (never type) or a wrapper \ + around it to introduce a type which can't be instantiated", + ); } } } diff --git a/clippy_lints/src/equatable_if_let.rs b/clippy_lints/src/equatable_if_let.rs index 37442bf3e2867..fb9f2b1526e38 100644 --- a/clippy_lints/src/equatable_if_let.rs +++ b/clippy_lints/src/equatable_if_let.rs @@ -70,9 +70,9 @@ fn is_structural_partial_eq<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, other: T impl<'tcx> LateLintPass<'tcx> for PatternEquality { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) { - if !in_external_macro(cx.sess(), expr.span) - && let ExprKind::Let(let_expr) = expr.kind + if let ExprKind::Let(let_expr) = expr.kind && unary_pattern(let_expr.pat) + && !in_external_macro(cx.sess(), expr.span) { let exp_ty = cx.typeck_results().expr_ty(let_expr.init); let pat_ty = cx.typeck_results().pat_ty(let_expr.pat); diff --git a/clippy_lints/src/error_impl_error.rs b/clippy_lints/src/error_impl_error.rs index 8e49138cd26ba..1e6447dc25370 100644 --- a/clippy_lints/src/error_impl_error.rs +++ b/clippy_lints/src/error_impl_error.rs @@ -36,15 +36,12 @@ declare_lint_pass!(ErrorImplError => [ERROR_IMPL_ERROR]); impl<'tcx> LateLintPass<'tcx> for ErrorImplError { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { - let Some(error_def_id) = cx.tcx.get_diagnostic_item(sym::Error) else { - return; - }; - match item.kind { ItemKind::TyAlias(..) if item.ident.name == sym::Error && is_visible_outside_module(cx, item.owner_id.def_id) && let ty = cx.tcx.type_of(item.owner_id).instantiate_identity() + && let Some(error_def_id) = cx.tcx.get_diagnostic_item(sym::Error) && implements_trait(cx, ty, error_def_id, &[]) => { span_lint( @@ -56,9 +53,9 @@ impl<'tcx> LateLintPass<'tcx> for ErrorImplError { }, ItemKind::Impl(imp) if let Some(trait_def_id) = imp.of_trait.and_then(|t| t.trait_def_id()) + && let Some(error_def_id) = cx.tcx.get_diagnostic_item(sym::Error) && error_def_id == trait_def_id && let Some(def_id) = path_res(cx, imp.self_ty).opt_def_id().and_then(DefId::as_local) - && let hir_id = cx.tcx.local_def_id_to_hir_id(def_id) && let Some(ident) = cx.tcx.opt_item_ident(def_id.to_def_id()) && ident.name == sym::Error && is_visible_outside_module(cx, def_id) => @@ -66,7 +63,7 @@ impl<'tcx> LateLintPass<'tcx> for ErrorImplError { span_lint_hir_and_then( cx, ERROR_IMPL_ERROR, - hir_id, + cx.tcx.local_def_id_to_hir_id(def_id), ident.span, "exported type named `Error` that implements `Error`", |diag| { diff --git a/clippy_lints/src/exhaustive_items.rs b/clippy_lints/src/exhaustive_items.rs index 436dc8611bdeb..0f4176ec73bb2 100644 --- a/clippy_lints/src/exhaustive_items.rs +++ b/clippy_lints/src/exhaustive_items.rs @@ -70,20 +70,24 @@ declare_lint_pass!(ExhaustiveItems => [EXHAUSTIVE_ENUMS, EXHAUSTIVE_STRUCTS]); impl LateLintPass<'_> for ExhaustiveItems { fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) { - if let ItemKind::Enum(..) | ItemKind::Struct(..) = item.kind - && cx.effective_visibilities.is_exported(item.owner_id.def_id) + let (lint, msg, fields) = match item.kind { + ItemKind::Enum(..) => ( + EXHAUSTIVE_ENUMS, + "exported enums should not be exhaustive", + [].as_slice(), + ), + ItemKind::Struct(v, ..) => ( + EXHAUSTIVE_STRUCTS, + "exported structs should not be exhaustive", + v.fields(), + ), + _ => return, + }; + if cx.effective_visibilities.is_exported(item.owner_id.def_id) && let attrs = cx.tcx.hir().attrs(item.hir_id()) && !attrs.iter().any(|a| a.has_name(sym::non_exhaustive)) + && fields.iter().all(|f| cx.tcx.visibility(f.def_id).is_public()) { - let (lint, msg) = if let ItemKind::Struct(ref v, ..) = item.kind { - if v.fields().iter().any(|f| !cx.tcx.visibility(f.def_id).is_public()) { - // skip structs with private fields - return; - } - (EXHAUSTIVE_STRUCTS, "exported structs should not be exhaustive") - } else { - (EXHAUSTIVE_ENUMS, "exported enums should not be exhaustive") - }; let suggestion_span = item.span.shrink_to_lo(); let indent = " ".repeat(indent_of(cx, item.span).unwrap_or(0)); span_lint_and_then(cx, lint, item.span, msg, |diag| { diff --git a/clippy_lints/src/exit.rs b/clippy_lints/src/exit.rs index 91c94d66458dc..f37d11f7eb9b7 100644 --- a/clippy_lints/src/exit.rs +++ b/clippy_lints/src/exit.rs @@ -1,6 +1,6 @@ use clippy_utils::diagnostics::span_lint; use clippy_utils::is_entrypoint_fn; -use rustc_hir::{Expr, ExprKind, Item, ItemKind, Node}; +use rustc_hir::{Expr, ExprKind, Item, ItemKind, OwnerNode}; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::declare_lint_pass; use rustc_span::sym; @@ -47,8 +47,8 @@ impl<'tcx> LateLintPass<'tcx> for Exit { && let ExprKind::Path(ref path) = path_expr.kind && let Some(def_id) = cx.qpath_res(path, path_expr.hir_id).opt_def_id() && cx.tcx.is_diagnostic_item(sym::process_exit, def_id) - && let parent = cx.tcx.hir().get_parent_item(e.hir_id).def_id - && let Node::Item(Item{kind: ItemKind::Fn(..), ..}) = cx.tcx.hir_node_by_def_id(parent) + && let parent = cx.tcx.hir().get_parent_item(e.hir_id) + && let OwnerNode::Item(Item{kind: ItemKind::Fn(..), ..}) = cx.tcx.hir_owner_node(parent) // If the next item up is a function we check if it is an entry point // and only then emit a linter warning && !is_entrypoint_fn(cx, parent.to_def_id()) diff --git a/clippy_lints/src/float_literal.rs b/clippy_lints/src/float_literal.rs index 2261fcdbdabc9..6adcd2235dc52 100644 --- a/clippy_lints/src/float_literal.rs +++ b/clippy_lints/src/float_literal.rs @@ -62,10 +62,9 @@ declare_lint_pass!(FloatLiteral => [EXCESSIVE_PRECISION, LOSSY_FLOAT_LITERAL]); impl<'tcx> LateLintPass<'tcx> for FloatLiteral { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) { - let ty = cx.typeck_results().expr_ty(expr); - if let ty::Float(fty) = *ty.kind() - && let hir::ExprKind::Lit(lit) = expr.kind + if let hir::ExprKind::Lit(lit) = expr.kind && let LitKind::Float(sym, lit_float_ty) = lit.node + && let ty::Float(fty) = *cx.typeck_results().expr_ty(expr).kind() { let sym_str = sym.as_str(); let formatter = FloatFormat::new(sym_str); diff --git a/clippy_lints/src/from_over_into.rs b/clippy_lints/src/from_over_into.rs index 150e9adf36330..b6c8437fb8f73 100644 --- a/clippy_lints/src/from_over_into.rs +++ b/clippy_lints/src/from_over_into.rs @@ -66,10 +66,6 @@ impl_lint_pass!(FromOverInto => [FROM_OVER_INTO]); impl<'tcx> LateLintPass<'tcx> for FromOverInto { fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) { - if !self.msrv.meets(msrvs::RE_REBALANCING_COHERENCE) || !span_is_local(item.span) { - return; - } - if let ItemKind::Impl(Impl { of_trait: Some(hir_trait_ref), self_ty, @@ -79,6 +75,8 @@ impl<'tcx> LateLintPass<'tcx> for FromOverInto { && let Some(into_trait_seg) = hir_trait_ref.path.segments.last() // `impl Into for self_ty` && let Some(GenericArgs { args: [GenericArg::Type(target_ty)], .. }) = into_trait_seg.args + && self.msrv.meets(msrvs::RE_REBALANCING_COHERENCE) + && span_is_local(item.span) && let Some(middle_trait_ref) = cx.tcx.impl_trait_ref(item.owner_id) .map(ty::EarlyBinder::instantiate_identity) && cx.tcx.is_diagnostic_item(sym::Into, middle_trait_ref.def_id) diff --git a/clippy_lints/src/from_str_radix_10.rs b/clippy_lints/src/from_str_radix_10.rs index 82ce501bac59b..9acb72b2e3729 100644 --- a/clippy_lints/src/from_str_radix_10.rs +++ b/clippy_lints/src/from_str_radix_10.rs @@ -47,9 +47,13 @@ impl<'tcx> LateLintPass<'tcx> for FromStrRadix10 { fn check_expr(&mut self, cx: &LateContext<'tcx>, exp: &Expr<'tcx>) { if let ExprKind::Call(maybe_path, [src, radix]) = &exp.kind && let ExprKind::Path(QPath::TypeRelative(ty, pathseg)) = &maybe_path.kind - // do not lint in constant context, because the suggestion won't work. - // NB: keep this check until a new `const_trait_impl` is available and stablized. - && !in_constant(cx, exp.hir_id) + + // check if the second argument is a primitive `10` + && is_integer_literal(radix, 10) + + // check if the second part of the path indeed calls the associated + // function `from_str_radix` + && pathseg.ident.name.as_str() == "from_str_radix" // check if the first part of the path is some integer primitive && let TyKind::Path(ty_qpath) = &ty.kind @@ -57,12 +61,9 @@ impl<'tcx> LateLintPass<'tcx> for FromStrRadix10 { && let def::Res::PrimTy(prim_ty) = ty_res && matches!(prim_ty, PrimTy::Int(_) | PrimTy::Uint(_)) - // check if the second part of the path indeed calls the associated - // function `from_str_radix` - && pathseg.ident.name.as_str() == "from_str_radix" - - // check if the second argument is a primitive `10` - && is_integer_literal(radix, 10) + // do not lint in constant context, because the suggestion won't work. + // NB: keep this check until a new `const_trait_impl` is available and stablized. + && !in_constant(cx, exp.hir_id) { let expr = if let ExprKind::AddrOf(_, _, expr) = &src.kind { let ty = cx.typeck_results().expr_ty(expr);