fe37cc1d97
Renamings: - find -> opt_hir_node - get -> hir_node - find_by_def_id -> opt_hir_node_by_def_id - get_by_def_id -> hir_node_by_def_id Fix rebase changes using removed methods Use `tcx.hir_node_by_def_id()` whenever possible in compiler Fix clippy errors Fix compiler Apply suggestions from code review Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com> Add FIXME for `tcx.hir()` returned type about its removal Simplify with with `tcx.hir_node_by_def_id`
58 lines
2.0 KiB
Rust
58 lines
2.0 KiB
Rust
use clippy_utils::diagnostics::span_lint;
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use clippy_utils::is_entrypoint_fn;
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use rustc_hir::{Expr, ExprKind, Item, ItemKind, Node};
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use rustc_lint::{LateContext, LateLintPass};
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use rustc_session::declare_lint_pass;
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use rustc_span::sym;
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declare_clippy_lint! {
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/// ### What it does
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/// Detects calls to the `exit()` function which terminates the program.
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///
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/// ### Why is this bad?
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/// Exit terminates the program at the location it is called. For unrecoverable
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/// errors `panics` should be used to provide a stacktrace and potentially other
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/// information. A normal termination or one with an error code should happen in
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/// the main function.
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///
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/// ### Example
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/// ```no_run
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/// std::process::exit(0)
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/// ```
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///
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/// Use instead:
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///
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/// ```ignore
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/// // To provide a stacktrace and additional information
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/// panic!("message");
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///
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/// // or a main method with a return
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/// fn main() -> Result<(), i32> {
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/// Ok(())
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/// }
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/// ```
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#[clippy::version = "1.41.0"]
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pub EXIT,
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restriction,
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"detects `std::process::exit` calls"
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}
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declare_lint_pass!(Exit => [EXIT]);
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impl<'tcx> LateLintPass<'tcx> for Exit {
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fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) {
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if let ExprKind::Call(path_expr, _args) = e.kind
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&& let ExprKind::Path(ref path) = path_expr.kind
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&& let Some(def_id) = cx.qpath_res(path, path_expr.hir_id).opt_def_id()
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&& cx.tcx.is_diagnostic_item(sym::process_exit, def_id)
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&& let parent = cx.tcx.hir().get_parent_item(e.hir_id).def_id
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&& let Some(Node::Item(Item{kind: ItemKind::Fn(..), ..})) = cx.tcx.opt_hir_node_by_def_id(parent)
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// If the next item up is a function we check if it is an entry point
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// and only then emit a linter warning
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&& !is_entrypoint_fn(cx, parent.to_def_id())
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{
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span_lint(cx, EXIT, e.span, "usage of `process::exit`");
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}
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}
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}
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