Add an imlementation of VL_CAST_DYNAMIC for VlNull

antmicro · Oct 27, 2023 · e3a5171 · e3a5171
1 parent 58b50b7
commit e3a5171
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diff --git a/include/verilated_types.h b/include/verilated_types.h
@@ -1698,6 +1698,12 @@ static inline bool VL_CAST_DYNAMIC(VlClassRef<T> in, VlClassRef<U>& outr) {
     }
 }
 
+template <typename T>
+static inline bool VL_CAST_DYNAMIC(VlNull in, VlClassRef<T>& outr) {
+    outr = VlNull{};
+    return true;
+}
+
 //=============================================================================
 // VlSampleQueue stores samples for input clockvars in clocking blocks. At a clocking event,
 // samples from this queue should be written to the correct input clockvar.

diff --git a/test_regress/t/t_castdyn.v b/test_regress/t/t_castdyn.v
@@ -55,6 +55,12 @@ module t (/*AUTOARG*/);
       if (i != 1) $stop;
       if (b != bb) $stop;
 
+      bb = null;
+      b = bb;
+      i = $cast(bbo, b);
+      if (i != 1) $stop;
+      if (b != bb) $stop;
+
       bb = new;
       b = bb;
       bao = ba;