From d2ac6d4d9f57b34eeb94bd6302b54a632051ce64 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 22 Dec 2019 14:45:42 +0900
Subject: [PATCH] Manage deprecation warning by the flag

---
 compile.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/compile.c b/compile.c
index c19112c853..56b91bfb46 100644
--- a/compile.c
+++ b/compile.c
@@ -7108,8 +7108,10 @@ check_yield_place(const rb_iseq_t *iseq, int line)
         return FALSE;
       case ISEQ_TYPE_CLASS:
         file = rb_iseq_path(iseq);
-        rb_compile_warn(RSTRING_PTR(file), line,
-                        "`yield' in class syntax will not be supported from Ruby 3.0. [Feature #15575]");
+        if (rb_warning_category_enabled_p(RB_WARN_CATEGORY_DEPRECATED)) {
+            rb_compile_warn(RSTRING_PTR(file), line,
+                            "`yield' in class syntax will not be supported from Ruby 3.0. [Feature #15575]");
+        }
         return TRUE;
       default:
         return TRUE;