Add autowiring of concrete types in existing instances

source/poodinis/autowire.d

@@ -0,0 +1,16 @@
+module poodinis.autowire;
+
+public import poodinis.container;
+
+enum Autowire;
+
+public void autowire(Type)(Container container, Type instance) {
+	import std.stdio;
+	foreach (member ; __traits(derivedMembers, Type)) {
+		foreach (attribute; mixin(`__traits(getAttributes, Type.` ~ member ~ `)`) ) {
+			if (is(attribute : Autowire)){
+				__traits(getMember, instance, member) = container.resolve!(typeof(__traits(getMember, instance, member)));
+			}
+		}
+	}
+}

test/poodinis/autowiretest.d

@@ -0,0 +1,23 @@
+import poodinis.autowire;
+
+version(unittest) {
+	class ComponentA {
+	}
+	
+	class ComponentB {
+		public @Autowire ComponentA componentA;
+		
+		public bool componentIsNull() {
+			return componentA is null;
+		}
+	}
+	
+	// Test autowiring concrete type to existing instance
+	unittest {
+		auto container = new Container();
+		container.register!ComponentA;
+		ComponentB componentB = new ComponentB();
+		container.autowire!(ComponentB)(componentB);
+		assert(!componentB.componentIsNull(), "Autowirable dependency failed to autowire");
+	}
+}