From accffbff8bf0072b69abaaf9010c3563af86b8d3 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Thu, 12 May 2022 22:03:14 -0700
Subject: [PATCH] Fix unused macro rule in no-default-features mode

    warning: 1st rule of macro `ast_struct` is never used
     --> src/macros.rs:2:5
      |
    2 | /     (
    3 | |         [$($attrs_pub:tt)*]
    4 | |         struct $name:ident #full $($rest:tt)*
    5 | |     ) => {
      | |_____^
      |
      = note: `#[warn(unused_macro_rules)]` on by default
---
 src/macros.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/macros.rs b/src/macros.rs
index 5473dd3faf..353b9a2c3c 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -1,3 +1,5 @@
+#[allow(unknown_lints)]
+#[cfg_attr(not(any(feature = "full", feature = "derive")), allow(unused_macro_rules))]
 macro_rules! ast_struct {
     (
         [$($attrs_pub:tt)*]