From 569426d861ac9336f4083e55f98284b4c647c795 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Fri, 23 Aug 2019 11:54:20 -0700
Subject: [PATCH] [debug] Fix build with HB_DEBUG

Fixes https://github.com/harfbuzz/harfbuzz/issues/1923
---
 src/hb-debug.hh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/hb-debug.hh b/src/hb-debug.hh
index e6d06e310..09437db6b 100644
--- a/src/hb-debug.hh
+++ b/src/hb-debug.hh
@@ -296,7 +296,8 @@ struct hb_auto_trace_t
     if (plevel) --*plevel;
   }
 
-  ret_t ret (ret_t v,
+  template <typename T>
+  T ret (T&& v,
 	     const char *func = "",
 	     unsigned int line = 0)
   {
@@ -307,7 +308,7 @@ struct hb_auto_trace_t
 
     _hb_debug_msg<max_level> (what, obj, func, true, plevel ? *plevel : 1, -1,
 			      "return %s (line %d)",
-			      hb_printer_t<ret_t>().print (v), line);
+			      hb_printer_t<decltype (v)>().print (v), line);
     if (plevel) --*plevel;
     plevel = nullptr;
     returned = true;