20 lines
642 B
Rust
20 lines
642 B
Rust
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use crate::consts::{constant, Constant};
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use crate::utils::{match_trait_method, paths, span_lint};
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use rustc_hir as hir;
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use rustc_lint::LateContext;
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use super::ITERATOR_STEP_BY_ZERO;
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pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &hir::Expr<'_>, args: &'tcx [hir::Expr<'_>]) {
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if match_trait_method(cx, expr, &paths::ITERATOR) {
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if let Some((Constant::Int(0), _)) = constant(cx, cx.typeck_results(), &args[1]) {
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span_lint(
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cx,
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ITERATOR_STEP_BY_ZERO,
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expr.span,
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"`Iterator::step_by(0)` will panic at runtime",
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);
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}
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}
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}
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