1 files changed, 29 insertions, 0 deletions
diff --git a/tensorflow/core/user_ops/fact.cc b/tensorflow/core/user_ops/fact.cc
new file mode 100644
index 0000000000..7b6932244d
--- /dev/null
+++ b/tensorflow/core/user_ops/fact.cc
@@ -0,0 +1,29 @@
+// An example Op.
+
+#include "tensorflow/core/framework/op.h"
+#include "tensorflow/core/framework/op_kernel.h"
+
+using namespace tensorflow;
+
+REGISTER_OP("Fact")
+    .Output("fact: string")
+    .Doc(R"doc(
+Output a fact about factorials.
+)doc");
+
+class FactOp : public OpKernel {
+ public:
+  explicit FactOp(OpKernelConstruction* context) : OpKernel(context) {}
+
+  void Compute(OpKernelContext* context) override {
+    // Output a scalar string.
+    Tensor* output_tensor = NULL;
+    OP_REQUIRES_OK(context,
+                   context->allocate_output(0, TensorShape(), &output_tensor));
+    auto output = output_tensor->template scalar<string>();
+
+    output() = "0! == 1";
+  }
+};
+
+REGISTER_KERNEL_BUILDER(Name("Fact").Device(DEVICE_CPU), FactOp);