Remove Op::Clone method

It is used by NetOp before.

paddle/fluid/framework/op_registry.h

@@ -186,13 +186,7 @@ struct OpKernelRegistrarFunctorEx<PlaceType, false, I,
   STATIC_ASSERT_GLOBAL_NAMESPACE(                                        \
       __reg_op__##op_type,                                               \
       "REGISTER_OPERATOR must be called in global namespace");           \
-  class _OpClass_##op_type##_ : public op_class {                      \
-   public:                                                             \
-    DEFINE_OP_CLONE_METHOD(_OpClass_##op_type##_);                     \
-    DEFINE_OP_CONSTRUCTOR(_OpClass_##op_type##_, op_class);            \
-  };                                                                   \
-  static ::paddle::framework::OperatorRegistrar<_OpClass_##op_type##_, \
-                                                ##__VA_ARGS__>         \
+  static ::paddle::framework::OperatorRegistrar<op_class, ##__VA_ARGS__> \
       __op_registrar_##op_type##__(#op_type);                            \
   int TouchOpRegistrar_##op_type() {                                     \
     __op_registrar_##op_type##__.Touch();                                \

paddle/fluid/framework/op_registry_test.cc

@@ -193,15 +193,10 @@ TEST(OpRegistry, CustomChecker) {
   ASSERT_EQ(test_attr, 4);
 }
 
-class CosineOpComplete : public paddle::framework::CosineOp {
- public:
-  DEFINE_OP_CONSTRUCTOR(CosineOpComplete, paddle::framework::CosineOp);
-  DEFINE_OP_CLONE_METHOD(CosineOpComplete);
-};
-
 TEST(OperatorRegistrar, Test) {
   paddle::framework::OperatorRegistrar<
-      CosineOpComplete, paddle::framework::CosineOpProtoAndCheckerMaker>
+      paddle::framework::CosineOp,
+      paddle::framework::CosineOpProtoAndCheckerMaker>
       reg("cos");
 }
 

paddle/fluid/framework/operator.h

@@ -121,10 +121,6 @@ class OperatorBase {
   //! Get all outputs variable names
   virtual std::vector<std::string> OutputVars(bool has_intermediate) const;
 
-  // Return a new operator instance, which is as same as this.
-  // Use unique_ptr to prevent caller forget to delete this pointer.
-  virtual std::unique_ptr<OperatorBase> Clone() const = 0;
-
  protected:
   std::string type_;
   // NOTE: in case of OpGrad, inputs_ contains:
@@ -145,37 +141,6 @@ class OperatorBase {
                        const platform::Place& place) const = 0;
 };
 
-// Macro for define a clone method.
-// If you are writing an kernel operator, `Clone` will be defined when you
-// register it. i.e. `Clone` method is not needed to define by yourself.
-#define DEFINE_OP_CLONE_METHOD(cls)                                            \
-  std::unique_ptr<::paddle::framework::OperatorBase> Clone() const final {     \
-    return std::unique_ptr<::paddle::framework::OperatorBase>(new cls(*this)); \
-  }
-
-// Macro for define a default constructor for Operator.
-// You can also use
-//   using PARENT_CLASS::PARENT_CLASS;
-// to use parent's constructor.
-#define DEFINE_OP_CONSTRUCTOR(cls, parent_cls)             \
-  cls(const std::string& type,                             \
-      const ::paddle::framework::VariableNameMap& inputs,  \
-      const ::paddle::framework::VariableNameMap& outputs, \
-      const paddle::framework::AttributeMap& attrs)        \
-      : parent_cls(type, inputs, outputs, attrs) {}
-
-class NOP : public OperatorBase {
- public:
-  using OperatorBase::OperatorBase;
-  std::unique_ptr<OperatorBase> Clone() const override {
-    return std::unique_ptr<OperatorBase>(new NOP(*this));
-  }
-
- private:
-  void RunImpl(const Scope& scope,
-               const platform::Place& place) const override {}
-};
-
 class ExecutionContext {
  public:
   ExecutionContext(const OperatorBase& op, const Scope& scope,

paddle/fluid/framework/operator_test.cc

@@ -247,26 +247,3 @@ TEST(OpKernel, multi_inputs) {
   auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   op->Run(scope, cpu_place);
 }
-
-class OperatorClone : public paddle::framework::OperatorBase {
- public:
-  DEFINE_OP_CLONE_METHOD(OperatorClone);
-  OperatorClone(const std::string& type,
-                const paddle::framework::VariableNameMap& inputs,
-                const paddle::framework::VariableNameMap& outputs,
-                const paddle::framework::AttributeMap& attrs)
-      : OperatorBase(type, inputs, outputs, attrs) {}
-
- private:
-  void RunImpl(const paddle::framework::Scope& scope,
-               const paddle::platform::Place& place) const override {}
-};
-
-TEST(Operator, Clone) {
-  paddle::framework::InitDevices(true);
-  OperatorClone a("ABC", paddle::framework::VariableNameMap{},
-                  paddle::framework::VariableNameMap{},
-                  paddle::framework::AttributeMap{});
-  auto b = a.Clone();
-  ASSERT_EQ(a.Type(), b->Type());
-}

paddle/fluid/framework/var_type_inference_test.cc

@@ -22,6 +22,17 @@ limitations under the License. */
 namespace paddle {
 namespace framework {
 
+class NOP : public OperatorBase {
+ public:
+  NOP(const std::string &type, const VariableNameMap &inputs,
+      const VariableNameMap &outputs, const AttributeMap &attrs)
+      : OperatorBase(type, inputs, outputs, attrs) {}
+
+ private:
+  void RunImpl(const Scope &scope,
+               const platform::Place &place) const override {}
+};
+
 class SumOpMaker : public OpProtoAndCheckerMaker {
  public:
   void Make() {