diff options
Diffstat (limited to 'src/tools/clippy/clippy_lints/src/operators')
3 files changed, 26 insertions, 18 deletions
diff --git a/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs b/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs index cff82b875..87a8a2ed1 100644 --- a/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs +++ b/src/tools/clippy/clippy_lints/src/operators/arithmetic_side_effects.rs @@ -1,8 +1,8 @@ use super::ARITHMETIC_SIDE_EFFECTS; use clippy_utils::{ - consts::{constant, constant_simple}, + consts::{constant, constant_simple, Constant}, diagnostics::span_lint, - peel_hir_expr_refs, peel_hir_expr_unary, + is_lint_allowed, peel_hir_expr_refs, peel_hir_expr_unary, }; use rustc_ast as ast; use rustc_data_structures::fx::{FxHashMap, FxHashSet}; @@ -97,17 +97,19 @@ impl ArithmeticSideEffects { self.expr_span = Some(expr.span); } - /// If `expr` is not a literal integer like `1`, returns `None`. + /// Returns the numeric value of a literal integer originated from `expr`, if any. /// - /// Returns the absolute value of the expression, if this is an integer literal. - fn literal_integer(expr: &hir::Expr<'_>) -> Option<u128> { + /// Literal integers can be originated from adhoc declarations like `1`, associated constants + /// like `i32::MAX` or constant references like `N` from `const N: i32 = 1;`, + fn literal_integer(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<u128> { let actual = peel_hir_expr_unary(expr).0; if let hir::ExprKind::Lit(ref lit) = actual.kind && let ast::LitKind::Int(n, _) = lit.node { - Some(n) + return Some(n) } - else { - None + if let Some((Constant::Int(n), _)) = constant(cx, cx.typeck_results(), expr) { + return Some(n); } + None } /// Manages when the lint should be triggered. Operations in constant environments, hard coded @@ -143,7 +145,10 @@ impl ArithmeticSideEffects { let has_valid_op = if Self::is_integral(lhs_ty) && Self::is_integral(rhs_ty) { let (actual_lhs, lhs_ref_counter) = peel_hir_expr_refs(lhs); let (actual_rhs, rhs_ref_counter) = peel_hir_expr_refs(rhs); - match (Self::literal_integer(actual_lhs), Self::literal_integer(actual_rhs)) { + match ( + Self::literal_integer(cx, actual_lhs), + Self::literal_integer(cx, actual_rhs), + ) { (None, None) => false, (None, Some(n)) | (Some(n), None) => match (&op.node, n) { (hir::BinOpKind::Div | hir::BinOpKind::Rem, 0) => false, @@ -180,20 +185,22 @@ impl ArithmeticSideEffects { return; } let actual_un_expr = peel_hir_expr_refs(un_expr).0; - if Self::literal_integer(actual_un_expr).is_some() { + if Self::literal_integer(cx, actual_un_expr).is_some() { return; } self.issue_lint(cx, expr); } - fn should_skip_expr(&mut self, expr: &hir::Expr<'_>) -> bool { - self.expr_span.is_some() || self.const_span.map_or(false, |sp| sp.contains(expr.span)) + fn should_skip_expr(&mut self, cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool { + is_lint_allowed(cx, ARITHMETIC_SIDE_EFFECTS, expr.hir_id) + || self.expr_span.is_some() + || self.const_span.map_or(false, |sp| sp.contains(expr.span)) } } impl<'tcx> LateLintPass<'tcx> for ArithmeticSideEffects { fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &hir::Expr<'tcx>) { - if self.should_skip_expr(expr) { + if self.should_skip_expr(cx, expr) { return; } match &expr.kind { @@ -209,7 +216,8 @@ impl<'tcx> LateLintPass<'tcx> for ArithmeticSideEffects { fn check_body(&mut self, cx: &LateContext<'_>, body: &hir::Body<'_>) { let body_owner = cx.tcx.hir().body_owner(body.id()); - let body_owner_def_id = cx.tcx.hir().local_def_id(body_owner); + let body_owner_def_id = cx.tcx.hir().body_owner_def_id(body.id()); + let body_owner_kind = cx.tcx.hir().body_owner_kind(body_owner_def_id); if let hir::BodyOwnerKind::Const | hir::BodyOwnerKind::Static(_) = body_owner_kind { let body_span = cx.tcx.hir().span_with_body(body_owner); diff --git a/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs b/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs index 24aeb82a3..d3de9699f 100644 --- a/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs +++ b/src/tools/clippy/clippy_lints/src/operators/cmp_owned.rs @@ -49,10 +49,10 @@ fn check_op(cx: &LateContext<'_>, expr: &Expr<'_>, other: &Expr<'_>, left: bool) (arg, arg.span) }, ExprKind::Call(path, [arg]) - if path_def_id(cx, path).map_or(false, |id| { - if match_def_path(cx, id, &paths::FROM_STR_METHOD) { + if path_def_id(cx, path).map_or(false, |did| { + if match_def_path(cx, did, &paths::FROM_STR_METHOD) { true - } else if cx.tcx.lang_items().from_fn() == Some(id) { + } else if cx.tcx.is_diagnostic_item(sym::from_fn, did) { !is_copy(cx, typeck.expr_ty(expr)) } else { false diff --git a/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs b/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs index 0830a106f..777395f45 100644 --- a/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs +++ b/src/tools/clippy/clippy_lints/src/operators/numeric_arithmetic.rs @@ -96,7 +96,7 @@ impl Context { pub fn enter_body(&mut self, cx: &LateContext<'_>, body: &hir::Body<'_>) { let body_owner = cx.tcx.hir().body_owner(body.id()); - let body_owner_def_id = cx.tcx.hir().local_def_id(body_owner); + let body_owner_def_id = cx.tcx.hir().body_owner_def_id(body.id()); match cx.tcx.hir().body_owner_kind(body_owner_def_id) { hir::BodyOwnerKind::Static(_) | hir::BodyOwnerKind::Const => { |