Fix #247

Assigning RefCounted to RefCounted fails at compile time.

https://issues.caraus.io/issues/247

codecov.yml

@@ -1,3 +1,4 @@
 ignore:
   - "source/tanya/async/event/iocp.d"
   - "source/tanya/async/iocp.d"
+  - "source/tanya/memory/types.d"

source/tanya/memory/smartref.d

@@ -63,6 +63,15 @@ package final class RefCountedStore(T)
             return 0;
         }
     }
+
+    private unittest
+    {
+        auto rcs = defaultAllocator.make!(RefCountedStore!int);
+        assert(rcs >= 1);
+        assert(rcs > 0);
+        assert(!(rcs > 2));
+        defaultAllocator.dispose(rcs);
+    }
 }
 
 package void separateDeleter(T)(RefCountedStore!T storage,
@@ -180,7 +189,7 @@ struct RefCounted(T)
      *
      * Returns: $(D_KEYWORD this).
      */
-    ref typeof(this) opAssign()(auto ref Payload!T rhs)
+    ref typeof(this) opAssign(Payload!T rhs)
     {
         if (this.storage is null)
         {
@@ -198,18 +207,18 @@ struct RefCounted(T)
             finalize(this.storage.payload);
             this.storage.payload = Payload!T.init;
         }
-        move(rhs, this.storage.payload);
+        this.storage.payload = rhs;
         return this;
     }
 
-    private unittest
+    private @nogc unittest
     {
         auto rc = defaultAllocator.refCounted!int(5);
         rc = defaultAllocator.make!int(7);
         assert(*rc == 7);
     }
 
-    private unittest
+    private @nogc unittest
     {
         auto rc = defaultAllocator.refCounted!int(5);
 
@@ -340,6 +349,12 @@ unittest
     assert(*rc.storage.payload == 9);
 }
 
+private unittest
+{
+    RefCounted!int rc1, rc2;
+    static assert(is(typeof(rc1 = rc2)));
+}
+
 version (unittest)
 {
     private class A
@@ -690,11 +705,10 @@ struct Unique(T)
      *
      * Returns: $(D_KEYWORD this).
      */
-    ref typeof(this) opAssign()(auto ref Payload!T rhs)
+    ref typeof(this) opAssign(Payload!T rhs)
     {
         allocator.dispose(this.payload);
-        move(rhs, this.payload);
-
+        this.payload = rhs;
         return this;
     }
 
@@ -761,7 +775,7 @@ struct Unique(T)
     }
 
     /**
-     * Resets this $(D_PARAM Unique) to its initial state.
+     * Sets the internal pointer to $(D_KEYWORD). The allocator isn't changed.
      *
      * Returns: Reference to the owned object.
      */