From b138bc2bdc8d8b10f9aa438c9d869f72bb86f694 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 27 Apr 2020 09:41:22 +0200
Subject: Make rule non-copyable

---
 libbuild2/rule.hxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libbuild2/rule.hxx b/libbuild2/rule.hxx
index d11f46c..e5e53d1 100644
--- a/libbuild2/rule.hxx
+++ b/libbuild2/rule.hxx
@@ -29,6 +29,11 @@ namespace build2
 
     virtual recipe
     apply (action, target&) const = 0;
+
+    rule () = default;
+
+    rule (const rule&) = delete;
+    rule& operator= (const rule&) = delete;
   };
 
   // Fallback rule that only matches if the file exists. It will also match
-- 
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