fn check_mul(cx: &LateContext<'_>, span: Span, lit: &Expr<'_>, exp: &Expr<'_>) {
if_chain! {
if let ExprKind::Lit(ref l) = lit.kind;
- if let Constant::Int(1) = consts::lit_to_constant(&l.node, cx.typeck_results().expr_ty_opt(lit));
+ if consts::lit_to_constant(&l.node, cx.typeck_results().expr_ty_opt(lit)) == Constant::Int(1);
if cx.typeck_results().expr_ty(exp).is_integral();
then {
span_lint(cx, NEG_MULTIPLY, span, "negation by multiplying with `-1`");