lightly_edge_error.h

/* © 2024 Lightly AI. All rights reserved. */
 
#ifndef LIGHTLY_EDGE_ERROR_H
#define LIGHTLY_EDGE_ERROR_H
 
#include "tl/expected.hpp"
#include <cstdint>
#include <string>
 
// Note: We add a namespace Doxygen comment so that documentation is generated
// for functions outside classes.
namespace lightly_edge_sdk {
 
struct Error {
  uint16_t code;
 
  std::string message;
 
  Error(uint16_t code, std::string message) : code(code), message(std::move(message)) {}
};
 
class Exception : public std::exception {
private:
  std::string message_;
 
public:
  explicit Exception(std::string message) : message_(std::move(message)) {}
  [[nodiscard]] auto what() const noexcept -> const char * override {
    return message_.c_str();
  }
};
 
template <typename T>
inline auto value_or_throw(tl::expected<T, lightly_edge_sdk::Error> &&result) -> T {
  if (!result.has_value()) {
    throw Exception(std::move(result).error().message);
  }
  return std::move(*result);
}
 
// Specialization of `value_or_throw` for `void` return type.
template <>
inline void value_or_throw(tl::expected<void, lightly_edge_sdk::Error> &&result) {
  if (!result.has_value()) {
    throw Exception(std::move(result).error().message);
  }
}
 
} // namespace lightly_edge_sdk
 
#endif // LIGHTLY_EDGE_ERROR_H