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Auto merge of #9015 - kyoto7250:issue_8493, r=Jarcho

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ignore item in `thread_local!` macro

close #8493

This PR ignores `thread_local` macro in `declare_interior_mutable_const`.

changelog: ignore `thread_local!` macro in `declare_interior_mutable_const`
This commit is contained in:
bors 2022-06-25 02:40:30 +00:00
commit 93ebd0e2db
2 changed files with 15 additions and 3 deletions
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13
clippy_lints/src/non_copy_const.rs
View file

@ -6,6 +6,7 @@ use std::ptr;
use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::in_constant;
use clippy_utils::macros::macro_backtrace;
use if_chain::if_chain;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::DefId;
@ -18,7 +19,7 @@ use rustc_middle::mir::interpret::{ConstValue, ErrorHandled};
use rustc_middle::ty::adjustment::Adjust;
use rustc_middle::ty::{self, Ty};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::{InnerSpan, Span, DUMMY_SP};
use rustc_span::{sym, InnerSpan, Span, DUMMY_SP};
use rustc_typeck::hir_ty_to_ty;
// FIXME: this is a correctness problem but there's no suitable
@ -250,8 +251,14 @@ impl<'tcx> LateLintPass<'tcx> for NonCopyConst {
fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx Item<'_>) {
if let ItemKind::Const(hir_ty, body_id) = it.kind {
let ty = hir_ty_to_ty(cx.tcx, hir_ty);
if is_unfrozen(cx, ty) && is_value_unfrozen_poly(cx, body_id, ty) {
if !macro_backtrace(it.span).last().map_or(false, |macro_call| {
matches!(
cx.tcx.get_diagnostic_name(macro_call.def_id),
Some(sym::thread_local_macro)
)
}) && is_unfrozen(cx, ty)
&& is_value_unfrozen_poly(cx, body_id, ty)
{
lint(cx, Source::Item { item: it.span });
}
}

5
tests/ui/declare_interior_mutable_const/others.rs
View file

@ -31,4 +31,9 @@ const NO_ANN: &dyn Display = &70;
static STATIC_TUPLE: (AtomicUsize, String) = (ATOMIC, STRING);
//^ there should be no lints on this line
// issue #8493
thread_local! {
static THREAD_LOCAL: Cell<i32> = const { Cell::new(0) };
}
fn main() {}