From baf232379877b63fc36cdfd1065b9ab366fb390c Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 9 Feb 2022 10:07:54 -0700
Subject: [PATCH] add PBD::PropertyChange::dump (std::ostream&) to make it
 easier to see what changed

---
 libs/pbd/pbd/property_basics.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/pbd/pbd/property_basics.h b/libs/pbd/pbd/property_basics.h
index da064c90a9..68b9bf2619 100644
--- a/libs/pbd/pbd/property_basics.h
+++ b/libs/pbd/pbd/property_basics.h
@@ -24,6 +24,7 @@
 #include <glib.h>
 #include <set>
 #include <vector>
+#include <ostream>
 
 #include "pbd/libpbd_visibility.h"
 #include "pbd/xml++.h"
@@ -79,6 +80,8 @@ public:
 	void add (PropertyID id)               { insert (id); }
 	void add (const PropertyChange& other) { insert (other.begin (), other.end ()); }
 	template<typename T> void add (PropertyDescriptor<T> p);
+
+	void dump (std::ostream& out) const { int n = 0; for (auto const & what_changed : *this) { if (n > 0) { out << ',' ; } out << g_quark_to_string (what_changed); ++n; } }
 };
 
 /** Base (non template) part of Property