use crate::utils::{span_lint, SpanlessEq};
use if_chain::if_chain;
-use rustc::hir::*;
-use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
-use rustc::{declare_lint_pass, declare_tool_lint};
+use rustc_hir::*;
+use rustc_lint::{LateContext, LateLintPass};
+use rustc_session::{declare_lint_pass, declare_tool_lint};
declare_clippy_lint! {
/// **What it does:** Detects classic underflow/overflow checks.
///
/// **Example:**
/// ```rust
- /// a + b < a
+ /// # let a = 1;
+ /// # let b = 2;
+ /// a + b < a;
/// ```
pub OVERFLOW_CHECK_CONDITIONAL,
complexity,
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for OverflowCheckConditional {
// a + b < a, a > a + b, a < a - b, a - b > a
- fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
+ fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
let eq = |l, r| SpanlessEq::new(cx).eq_path_segment(l, r);
if_chain! {
- if let ExprKind::Binary(ref op, ref first, ref second) = expr.node;
- if let ExprKind::Binary(ref op2, ref ident1, ref ident2) = first.node;
- if let ExprKind::Path(QPath::Resolved(_, ref path1)) = ident1.node;
- if let ExprKind::Path(QPath::Resolved(_, ref path2)) = ident2.node;
- if let ExprKind::Path(QPath::Resolved(_, ref path3)) = second.node;
+ if let ExprKind::Binary(ref op, ref first, ref second) = expr.kind;
+ if let ExprKind::Binary(ref op2, ref ident1, ref ident2) = first.kind;
+ if let ExprKind::Path(QPath::Resolved(_, ref path1)) = ident1.kind;
+ if let ExprKind::Path(QPath::Resolved(_, ref path2)) = ident2.kind;
+ if let ExprKind::Path(QPath::Resolved(_, ref path3)) = second.kind;
if eq(&path1.segments[0], &path3.segments[0]) || eq(&path2.segments[0], &path3.segments[0]);
if cx.tables.expr_ty(ident1).is_integral();
if cx.tables.expr_ty(ident2).is_integral();
}
if_chain! {
- if let ExprKind::Binary(ref op, ref first, ref second) = expr.node;
- if let ExprKind::Binary(ref op2, ref ident1, ref ident2) = second.node;
- if let ExprKind::Path(QPath::Resolved(_, ref path1)) = ident1.node;
- if let ExprKind::Path(QPath::Resolved(_, ref path2)) = ident2.node;
- if let ExprKind::Path(QPath::Resolved(_, ref path3)) = first.node;
+ if let ExprKind::Binary(ref op, ref first, ref second) = expr.kind;
+ if let ExprKind::Binary(ref op2, ref ident1, ref ident2) = second.kind;
+ if let ExprKind::Path(QPath::Resolved(_, ref path1)) = ident1.kind;
+ if let ExprKind::Path(QPath::Resolved(_, ref path2)) = ident2.kind;
+ if let ExprKind::Path(QPath::Resolved(_, ref path3)) = first.kind;
if eq(&path1.segments[0], &path3.segments[0]) || eq(&path2.segments[0], &path3.segments[0]);
if cx.tables.expr_ty(ident1).is_integral();
if cx.tables.expr_ty(ident2).is_integral();