From 9d71185a55558c80c85a65e13427dd491a2f4451 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 18 Dec 2022 12:59:32 +0200
Subject: [PATCH] Disable the templated constructor of Value if the source type
 is Value

Microsoft's std::vector uses a T & (without const) for copying, which
resolves to the templated constructor instead of the copy constructor
unless the former is disabled for that signature.
---
 source/value.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/value.h b/source/value.h
index bcddd6e..ba61181 100644
--- a/source/value.h
+++ b/source/value.h
@@ -2,6 +2,7 @@
 #define MSP_DATAFILE_VALUE_H_
 
 #include <vector>
+#include <type_traits>
 #include <msp/core/attributes.h>
 #include <msp/core/meta.h>
 #include <msp/core/variant.h>
@@ -18,7 +19,7 @@ private:
 
 public:
 	template<typename T>
-	Value(T &&d):
+	Value(T &&d, typename std::enable_if<!std::is_same<typename std::remove_reference<T>::type, Value>::value, int>::type = 0):
 		sig(TypeInfo<T>::signature),
 		data(static_cast<typename TypeInfo<T>::Store>(std::forward<T>(d)))
 	{ }
-- 
2.45.2