get_param_result.hpp

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#pragma once

#include <string>
#include <type_traits>

#include <ros/console_backend.h>

namespace cras
{

struct GetParamResultInfo
{
  bool defaultUsed {false};

  bool convertFailed {false};

  bool requiredMissing {false};

  ::std::string message{};

  ::ros::console::Level messageLevel {::ros::console::Level::Count};
};

template <typename T>
struct GetParamResult
{
  GetParamResult(const T& value, const ::cras::GetParamResultInfo& info) : value(value), info(info) {}

  operator T() const  // NOLINT(google-explicit-constructor)
  {
    return this->value;
  }

  template <typename = ::std::enable_if<::std::is_same<T, char*>::value>>
  operator ::std::string() const  // NOLINT(google-explicit-constructor)
  {
    return {this->value};
  }

  template <int I, typename = ::std::enable_if<::std::is_same<T, char[I]>::value>>
  operator ::std::string() const  // NOLINT(google-explicit-constructor)
  {
    return {this->value};
  }

  T value;

  ::cras::GetParamResultInfo info {};
};

}