IVGCVSW-5410 Add front-end support for CAST
IVGCVSW-5415 Add TfLiteParser support for CAST

 * Added front end support for CAST, including support in the
Reference workload, Serialization, Deserializtion, Unit tests, and
TfLiteParser.

Signed-off-by: mathad01 <matthew.haddon@arm.com>
Change-Id: Iaf670ca5912a21ed6bc84f7f83a68b42154846bb
diff --git a/src/backends/reference/RefLayerSupport.hpp b/src/backends/reference/RefLayerSupport.hpp
index b75b778..7a95bb0 100644
--- a/src/backends/reference/RefLayerSupport.hpp
+++ b/src/backends/reference/RefLayerSupport.hpp
@@ -46,6 +46,10 @@
                                    const BatchToSpaceNdDescriptor& descriptor,
                                    Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
+    bool IsCastSupported(const TensorInfo& input,
+                         const TensorInfo& output,
+                         Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
+
     bool IsComparisonSupported(const TensorInfo& input0,
                                const TensorInfo& input1,
                                const TensorInfo& output,