WrapperCommand.h

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// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.
 
#pragma once
 
#ifdef _WIN32
#pragma warning(push)
#pragma warning(disable : 4521)
#endif
 
#include <memory>
#include <utility>
 
#include "frc2/command/CommandBase.h"
#include "frc2/command/CommandHelper.h"
 
namespace frc2 {
/**
 * A class used internally to wrap commands while overriding a specific method;
 * all other methods will call through to the wrapped command.
 *
 * <p>Wrapped commands may only be used through the wrapper, trying to directly
 * schedule them or add them to a group will throw an exception.
 */
class WrapperCommand : public CommandHelper<CommandBase, WrapperCommand> {
 public:
  /**
   * Wrap a command.
   *
   * @param command the command being wrapped. Trying to directly schedule this
   * command or add it to a group will throw an exception.
   */
  explicit WrapperCommand(std::unique_ptr<Command>&& command);
 
  /**
   * Wrap a command.
   *
   * @param command the command being wrapped. Trying to directly schedule this
   * command or add it to a group will throw an exception.
   */
  template <class T, typename = std::enable_if_t<std::is_base_of_v<
                         Command, std::remove_reference_t<T>>>>
  explicit WrapperCommand(T&& command)
      : WrapperCommand(std::make_unique<std::remove_reference_t<T>>(
            std::forward<T>(command))) {}
 
  WrapperCommand(WrapperCommand&& other) = default;
 
  // No copy constructors for command groups
  WrapperCommand(const WrapperCommand& other) = delete;
 
  // Prevent template expansion from emulating copy ctor
  WrapperCommand(WrapperCommand&) = delete;
 
  void Initialize() override;
 
  void Execute() override;
 
  bool IsFinished() override;
 
  void End(bool interrupted) override;
 
  bool RunsWhenDisabled() const override;
 
  InterruptionBehavior GetInterruptionBehavior() const override;
 
  wpi::SmallSet<Subsystem*, 4> GetRequirements() const override;
 
 protected:
  std::unique_ptr<Command> m_command;
};
}  // namespace frc2
 
#ifdef _WIN32
#pragma warning(pop)
#endif