Implement InvalidShapeException

include/shape.hpp

@@ -6,4 +6,21 @@ namespace CUDANet {
 
 typedef std::vector<size_t> Shape;
 
-} // namespace CUDANet
+class InvalidShapeException : public std::runtime_error {
+  public:
+    InvalidShapeException(
+        const std::string& param_name,
+        size_t             expected,
+        size_t             actual
+    )
+        : std::runtime_error(
+              std::format(
+                  "Invalid {} shape. Expected {}, actual {}",
+                  param_name,
+                  expected,
+                  actual
+              )
+          ) {}
+};
+
+}  // namespace CUDANet