From 44b6aca96b48299adf0ab44307c40d7f3392d060 Mon Sep 17 00:00:00 2001
From: koka <koka.code@gmail.com>
Date: Sat, 30 Sep 2023 23:56:11 +0900
Subject: [PATCH] Avoid linting in external/proc macro

---
 clippy_lints/src/std_instead_of_core.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/clippy_lints/src/std_instead_of_core.rs b/clippy_lints/src/std_instead_of_core.rs
index 5f54a10d1c4..b7396535eed 100644
--- a/clippy_lints/src/std_instead_of_core.rs
+++ b/clippy_lints/src/std_instead_of_core.rs
@@ -1,9 +1,11 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::is_from_proc_macro;
 use rustc_errors::Applicability;
 use rustc_hir::def::Res;
 use rustc_hir::def_id::DefId;
 use rustc_hir::{HirId, Path, PathSegment};
-use rustc_lint::{LateContext, LateLintPass};
+use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_middle::lint::in_external_macro;
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::symbol::kw;
 use rustc_span::{sym, Span};
@@ -99,6 +101,8 @@ impl<'tcx> LateLintPass<'tcx> for StdReexports {
         if let Res::Def(_, def_id) = path.res
             && let Some(first_segment) = get_first_segment(path)
             && is_stable(cx, def_id)
+            && !in_external_macro(cx.sess(), path.span)
+            && !is_from_proc_macro(cx, &first_segment.ident)
         {
             let (lint, used_mod, replace_with) = match first_segment.ident.name {
                 sym::std => match cx.tcx.crate_name(def_id.krate) {