From d69dab7433f8215aed78eddcb8244ceda2381ab6 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Thu, 17 Jun 2021 19:51:52 +0100
Subject: Add wrapper for writing a DbValueV to a stream

---
 lib/dbTypes.cpp | 19 +++++++++++++++++++
 lib/dbTypes.h   |  4 ++++
 2 files changed, 23 insertions(+)
 create mode 100644 lib/dbTypes.cpp

(limited to 'lib')

diff --git a/lib/dbTypes.cpp b/lib/dbTypes.cpp
new file mode 100644
index 0000000..7a428ae
--- /dev/null
+++ b/lib/dbTypes.cpp
@@ -0,0 +1,19 @@
+#include "dbTypes.h"
+
+namespace std {
+	struct write {
+		template<typename T>
+		std::ostream &
+		operator()(const T & v) const
+		{
+			return strm << v;
+		}
+		std::ostream & strm;
+	};
+
+	std::ostream &
+	operator<<(std::ostream & strm, const MyGrate::DbValueV & v)
+	{
+		return std::visit(write {strm}, v);
+	}
+}
diff --git a/lib/dbTypes.h b/lib/dbTypes.h
index 332b896..0b7185c 100644
--- a/lib/dbTypes.h
+++ b/lib/dbTypes.h
@@ -131,4 +131,8 @@ namespace MyGrate {
 	};
 }
 
+namespace std {
+	std::ostream & operator<<(std::ostream & strm, const MyGrate::DbValueV & v);
+}
+
 #endif
-- 
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