From 1111a8b005308087101daf7facabfee1a473d420 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 4 Dec 2020 19:27:28 +0000
Subject: Better detection first param is a stream

Also works around weirdness with ubsan
---
 libadhocutil/compileTimeFormatter.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libadhocutil/compileTimeFormatter.h b/libadhocutil/compileTimeFormatter.h
index 1d47ef7..b454863 100644
--- a/libadhocutil/compileTimeFormatter.h
+++ b/libadhocutil/compileTimeFormatter.h
@@ -207,7 +207,7 @@ namespace AdHoc {
 		 * @return the stream.
 		 */
 		template<typename stream, typename... Pn>
-		inline typename std::enable_if<(bool)&stream::write, stream>::type &
+		inline typename std::enable_if<std::is_base_of_v<std::basic_ostream<char_type>, stream>, stream>::type &
 		operator()(stream & s, const Pn &... pn) const
 		{
 			return write(s, pn...);
-- 
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