defer and struct hooks

example/src/main.nub

@@ -1,6 +1,8 @@
 module "main"
 
 extern "puts" func puts(text: cstring)
+extern "malloc" func malloc(size: u64): ^u64
+extern "free" func free(address: ^u64)
 
 struct Human
 {
@@ -9,28 +11,49 @@ struct Human
 
 extern "main" func main(args: []cstring): i64
 {
-    let x = [2]cstring
+    let x: ref = {}
 
-    x[0] = "test1"
-    x[1] = "test2"
-
-    for u in x
-    {
-        puts(u)
-    }
-
-    let me: Human = {
-        name = "test"
-    }
-
-    puts(me.name)
-
-    test(32)
+    test(x)
 
     return 0
 }
 
-
-func test(x: u8)
+func test(x: ref)
 {
+
+}
+
+struct ref
+{
+    value: ^u64
+    count: ^u64
+
+    @oncreate
+    func on_create()
+    {
+        puts("on_create")
+        this.value = malloc(8)
+        this.count = malloc(8)
+        this.count^ = 1
+    }
+
+    @oncopy
+    func on_copy()
+    {
+        puts("on_copy")
+        this.count^ = this.count^ + 1
+    }
+
+    @ondestroy
+    func on_destroy()
+    {
+        puts("on_destroy")
+        this.count^ = this.count^ - 1
+        if this.count^ <= 0
+        {
+            puts("free")
+            free(this.value)
+            free(this.count)
+        }
+    }
 }