release() implemented for scope_guard (fixes #4).

include/scope_guard.h

@@ -11,7 +11,8 @@ namespace sg
     {
     public:
 
-        explicit scope_guard_t(Deleter&& deleter) noexcept : m_deleter(std::move(deleter))
+        explicit scope_guard_t(Deleter&& deleter) noexcept : m_deleter(std::move(deleter)),
+                                                        m_execute_on_destruction(true)
         {
         }
 
@@ -20,7 +21,16 @@ namespace sg
 
         ~scope_guard_t()
         {
-            m_deleter();
+            if( m_execute_on_destruction == true )
+            {
+                m_deleter();
+            }
+        }
+
+
+        void release()
+        {
+            m_execute_on_destruction = false;
         }
 
 
@@ -31,6 +41,7 @@ namespace sg
     private:
 
         Deleter m_deleter;
+        bool m_execute_on_destruction;
     };
 
 

test/ScopeGuardTest.cpp

@@ -14,3 +14,15 @@ TEST_CASE("deleter called on destruction", "[ScopeGuard]")
     REQUIRE(executed == true);
 }
 
+TEST_CASE("deleter is not called if released", "[ScopeGuard]")
+{
+    bool executed = false;
+
+    {
+        auto guard = sg::scope_guard([&executed] { executed = true; });
+        guard.release();
+    }
+
+    REQUIRE(executed == false);
+}
+