From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 28 Oct 2016 11:24:40 +0000 (+0300)
Subject: Add a construct to create conditional RAII objects
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=dd522da4782ec2dab70bc80f7edab89db0ad826b;p=libs%2Fcore.git

Add a construct to create conditional RAII objects
---

diff --git a/source/core/raii.h b/source/core/raii.h
index fde7e3e..6cb24a9 100644
--- a/source/core/raii.h
+++ b/source/core/raii.h
@@ -25,6 +25,24 @@ public:
 	SetFlag(bool &r, bool v = true): SetForScope<bool>(r, v) { }
 };
 
+
+template<typename T>
+class Conditional
+{
+private:
+	char buf[sizeof(T)];
+	T *obj;
+
+public:
+	template<typename A>
+	Conditional(bool c, const A &a): obj(c ? new(buf) T(a) : 0) { }
+
+	template<typename A0, typename A1>
+	Conditional(bool c, const A0 &a0, const A1 &a1): obj(c ? new(buf) T(a0, a1) : 0) { }
+
+	~Conditional() { if(obj) obj->~T(); }
+};
+
 } // namespace Msp
 
 #endif