text: /**
   * Copyright 2021 Huawei Technologies Co., Ltd
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include "ops/sign.h"
  #include <string>
  #include <algorithm>
  #include <set>
  #include "ops/op_utils.h"
  #include "utils/check_convert_utils.h"
  #include "abstract/primitive_infer_map.h"
  
  namespace mindspore {
  namespace ops {
  namespace {
  abstract::ShapePtr SignInferShape(const PrimitivePtr &primitive, const std::vector<AbstractBasePtr> &input_args) {
    MS_EXCEPTION_IF_NULL(primitive);
    auto prim_name = primitive->name();
    (void)CheckAndConvertUtils::CheckInteger("input number", SizeToLong(input_args.size()), kEqual, 1, prim_name);
    MS_EXCEPTION_IF_NULL(input_args[0]);
    CheckAndConvertUtils::CheckArgs<abstract::AbstractTensor>(prim_name, input_args, 0);
    auto x = input_args[0]->BuildShape();
    MS_EXCEPTION_IF_NULL(x);
    auto shape_element = x->cast<abstract::ShapePtr>();
    MS_EXCEPTION_IF_NULL(shape_element);
    return shape_element;
  }
  
  TypePtr SignInferType(const PrimitivePtr &primitive, const std::vector<AbstractBasePtr> &input_args) {
    auto x_type = input_args[0]->BuildType();
    (void)CheckAndConvertUtils::CheckTensorTypeValid("x", x_type, common_valid_types, primitive->name());
    return x_type;
  }
  }  // namespace
  
  AbstractBasePtr SignInfer(const abstract::AnalysisEnginePtr &, const PrimitivePtr &primitive,
                            const std::vector<AbstractBasePtr> &input_args) {
    MS_EXCEPTION_IF_NULL(primitive);
    const int64_t input_num = 1;
    CheckAndConvertUtils::CheckInputArgs(input_args, kEqual, input_num, primitive->name());
  
    return abstract::MakeAbstract(SignInferShape(primitive, input_args), SignInferType(primitive, input_args));
  }
  REGISTER_PRIMITIVE_EVAL_IMPL(Sign, prim::kPrimSign, SignInfer, nullptr, true);
  }  // namespace ops
  }  // namespace mindspore
  