+use clippy_utils::diagnostics::span_lint;
use if_chain::if_chain;
use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp};
use rustc_lint::{LateContext, LateLintPass};
use rustc_span::source_map::Span;
use crate::consts::{self, Constant};
-use crate::utils::span_lint;
declare_clippy_lint! {
/// **What it does:** Checks for multiplication by -1 as a form of negation.
#[allow(clippy::match_same_arms)]
impl<'tcx> LateLintPass<'tcx> for NegMultiply {
fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) {
- if let ExprKind::Binary(ref op, ref left, ref right) = e.kind {
+ if let ExprKind::Binary(ref op, left, right) = e.kind {
if BinOpKind::Mul == op.node {
match (&left.kind, &right.kind) {
(&ExprKind::Unary(..), &ExprKind::Unary(..)) => {},
- (&ExprKind::Unary(UnOp::Neg, ref lit), _) => check_mul(cx, e.span, lit, right),
- (_, &ExprKind::Unary(UnOp::Neg, ref lit)) => check_mul(cx, e.span, lit, left),
+ (&ExprKind::Unary(UnOp::Neg, lit), _) => check_mul(cx, e.span, lit, right),
+ (_, &ExprKind::Unary(UnOp::Neg, lit)) => check_mul(cx, e.span, lit, left),
_ => {},
}
}