mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-23 03:23:33 +00:00
17 lines
790 B
Rust
17 lines
790 B
Rust
use super::EMPTY_LOOP;
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use crate::utils::{is_in_panic_handler, is_no_std_crate, span_lint_and_help};
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use rustc_hir::{Block, Expr};
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use rustc_lint::LateContext;
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pub(super) fn check(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, loop_block: &'tcx Block<'_>) {
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if loop_block.stmts.is_empty() && loop_block.expr.is_none() && !is_in_panic_handler(cx, expr) {
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let msg = "empty `loop {}` wastes CPU cycles";
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let help = if is_no_std_crate(cx.tcx.hir().krate()) {
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"you should either use `panic!()` or add a call pausing or sleeping the thread to the loop body"
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} else {
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"you should either use `panic!()` or add `std::thread::sleep(..);` to the loop body"
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};
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span_lint_and_help(cx, EMPTY_LOOP, expr.span, msg, None, help);
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}
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}
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