1 use crate::consts::{constant, Constant};
2 use crate::utils::{match_trait_method, paths, span_lint};
4 use rustc_lint::LateContext;
6 use super::ITERATOR_STEP_BY_ZERO;
8 pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &hir::Expr<'_>, args: &'tcx [hir::Expr<'_>]) {
9 if match_trait_method(cx, expr, &paths::ITERATOR) {
10 if let Some((Constant::Int(0), _)) = constant(cx, cx.typeck_results(), &args[1]) {
13 ITERATOR_STEP_BY_ZERO,
15 "`Iterator::step_by(0)` will panic at runtime",