X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fvariant.h;h=fccf891850f8045a528ad723b7fd781c7df72c09;hb=83fcabb1fc1acff5d115f07253f801fc3f7cca9a;hp=5de5a726f2dde80ee987c582851bbac2ca0523e6;hpb=5d51c374869f13f762039f58c03f3c5d75c12f07;p=libs%2Fcore.git

diff --git a/source/core/variant.h b/source/core/variant.h
index 5de5a72..fccf891 100644
--- a/source/core/variant.h
+++ b/source/core/variant.h
@@ -5,17 +5,18 @@
 #include <type_traits>
 #include <typeinfo>
 #include "meta.h"
+#include "mspcore_api.h"
 
 namespace Msp {
 
-class type_mismatch: public std::runtime_error
+class MSPCORE_API type_mismatch: public std::runtime_error
 {
 public:
 	type_mismatch(const std::type_info &, const std::type_info &);
 };
 
 
-class Variant
+class MSPCORE_API Variant
 {
 public:
 	static constexpr unsigned INTERNAL_SIZE = 2*sizeof(void *);
@@ -37,13 +38,15 @@ public:
 	template<typename T>
 	Variant(const T &v) { assign(v); }
 	Variant(const Variant &v) { copy_from(v); }
-	~Variant() { if(funcs) funcs->destroy(storage); }
+	~Variant() { clear(); }
 
 	template<typename T>
 	Variant &operator=(const T &v) { assign(v); return *this; }
 
 	Variant &operator=(const Variant &v) { if(&v!=this) copy_from(v); return *this; }
 
+	void clear();
+
 private:
 	template<typename T>
 	void assign(const T &);
@@ -132,23 +135,25 @@ private:
 };
 
 
-template<typename T>
-inline void Variant::assign(const T &v)
+inline void Variant::clear()
 {
 	if(funcs)
 		funcs->destroy(storage);
+	funcs = nullptr;
+}
 
+template<typename T>
+inline void Variant::assign(const T &v)
+{
+	clear();
 	funcs = get_functions<typename std::remove_cv<T>::type>();
 	create(storage, v);
 }
 
 inline void Variant::copy_from(const Variant &v)
 {
-	if(funcs)
-		funcs->destroy(storage);
-
-	funcs = v.funcs;
-	if(funcs)
+	clear();
+	if((funcs = v.funcs))
 		funcs->clone(storage, v.storage);
 }