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[rust.git] / src / tools / clippy / clippy_lints / src / methods / suspicious_map.rs
1 use crate::utils::span_lint_and_help;
2 use rustc_hir as hir;
3 use rustc_lint::LateContext;
4
5 use super::SUSPICIOUS_MAP;
6
7 pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>) {
8     span_lint_and_help(
9         cx,
10         SUSPICIOUS_MAP,
11         expr.span,
12         "this call to `map()` won't have an effect on the call to `count()`",
13         None,
14         "make sure you did not confuse `map` with `filter` or `for_each`",
15     );
16 }