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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmVariableWatchCommand_h
#define cmVariableWatchCommand_h
#include "cmConfigure.h"
#include <set>
#include <string>
#include <vector>
#include "cmCommand.h"
class cmExecutionStatus;
/** \class cmVariableWatchCommand
* \brief Watch when the variable changes and invoke command
*
*/
class cmVariableWatchCommand : public cmCommand
{
public:
/**
* This is a virtual constructor for the command.
*/
cmCommand* Clone() CM_OVERRIDE { return new cmVariableWatchCommand; }
//! Default constructor
cmVariableWatchCommand();
//! Destructor.
~cmVariableWatchCommand() CM_OVERRIDE;
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
bool InitialPass(std::vector<std::string> const& args,
cmExecutionStatus& status) CM_OVERRIDE;
/** This command does not really have a final pass but it needs to
stay alive since it owns variable watch callback information. */
bool HasFinalPass() const CM_OVERRIDE { return true; }
protected:
std::set<std::string> WatchedVariables;
};
#endif
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