/*

 * Copyright 2017 WebAssembly Community Group participants

 *

 * 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.

 */

#ifndef WABT_RESULT_H_

#define WABT_RESULT_H_

namespace wabt {

struct Result {

  enum Enum {

    Ok,

    Error,

  };

  Result() : Result(Ok) {}

  Result(Enum e) : enum_(e) {}

  operator Enum() const { return enum_; }

  Result& operator|=(Result rhs);

 private:

  Enum enum_;

};

inline Result operator|(Result lhs, Result rhs) {

  return (lhs == Result::Error || rhs == Result::Error) ? Result::Error

                                                        : Result::Ok;

}

inline Result& Result::operator|=(Result rhs) {

  enum_ = *this | rhs;

  return *this;

}

inline bool Succeeded(Result result) {

  return result == Result::Ok;

}

inline bool Failed(Result result) {

  return result == Result::Error;

}

#define CHECK_RESULT(expr)          \

  do {                              \

    if (Failed(expr)) {             \

      return ::wabt::Result::Error; \

    }                               \

  } while (0)

}  // namespace wabt

#endif  // WABT_RESULT_H_