Adding an AutoDesired type for use in cases where exception robustnes…

…s is desired

autowiring/Autowired.h

@@ -273,6 +273,31 @@ class AutoRequired:
   bool IsAutowired(void) const {return std::shared_ptr<T>::get() != nullptr;}
 };
 
+/// <summary>
+/// Convenience class which attempts to inject type T and discards any exceptions
+/// </summary>
+/// <remarks>
+/// Use of this type is functionally equivalent to the following:
+///
+///  try {
+///    AutoCurrentContext()->Inject&lt;T&gt;();
+///  catch(...) {}
+///  Autowired&lt;T&gt; foo;
+///
+/// Users who wish to know whether an exception was thrown may replace uses of AutoDesired with the above
+/// and perform their own handling.
+/// </remarks>
+template<class T>
+class AutoDesired:
+  public Autowired<T>
+{
+public:
+  AutoDesired(void) {
+    try { AutoRequired<T>(); }
+    catch(...) {}
+  }
+};
+
 /// <summary>
 /// Convenience class functionally identical to AutoRequired, but specialized to forward ctor arguments
 /// </summary>