From 26838f8552bcb6bf38a10b56d0548580bf82c706 Mon Sep 17 00:00:00 2001
From: lapla-cogito <me@lapla.dev>
Date: Wed, 22 Jan 2025 04:55:42 +0900
Subject: [PATCH] don't trigger `needless_late_init` when the first usage is in
 macro

---
 clippy_lints/src/needless_late_init.rs |  4 ++++
 tests/ui/needless_late_init.fixed      | 11 +++++++++++
 tests/ui/needless_late_init.rs         | 11 +++++++++++
 3 files changed, 26 insertions(+)

diff --git a/clippy_lints/src/needless_late_init.rs b/clippy_lints/src/needless_late_init.rs
index a67addea9486..dca3c0b10cdb 100644
--- a/clippy_lints/src/needless_late_init.rs
+++ b/clippy_lints/src/needless_late_init.rs
@@ -107,6 +107,10 @@ struct LocalAssign {
 
 impl LocalAssign {
     fn from_expr(expr: &Expr<'_>, span: Span) -> Option<Self> {
+        if expr.span.from_expansion() {
+            return None;
+        }
+
         if let ExprKind::Assign(lhs, rhs, _) = expr.kind {
             if lhs.span.from_expansion() {
                 return None;
diff --git a/tests/ui/needless_late_init.fixed b/tests/ui/needless_late_init.fixed
index 6db870490445..b4bd53ce7bf7 100644
--- a/tests/ui/needless_late_init.fixed
+++ b/tests/ui/needless_late_init.fixed
@@ -270,3 +270,14 @@ fn issue8911() -> u32 {
 
     3
 }
+
+macro_rules! issue13776_mac {
+    ($var:expr, $val:literal) => {
+        $var = $val;
+    };
+}
+
+fn issue13776() {
+    let x;
+    issue13776_mac!(x, 10); // should not lint
+}
diff --git a/tests/ui/needless_late_init.rs b/tests/ui/needless_late_init.rs
index c1e86212a08b..e25483625a68 100644
--- a/tests/ui/needless_late_init.rs
+++ b/tests/ui/needless_late_init.rs
@@ -270,3 +270,14 @@ fn issue8911() -> u32 {
 
     3
 }
+
+macro_rules! issue13776_mac {
+    ($var:expr, $val:literal) => {
+        $var = $val;
+    };
+}
+
+fn issue13776() {
+    let x;
+    issue13776_mac!(x, 10); // should not lint
+}