/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef cmSetCommand_h
#define cmSetCommand_h

#include "cmStandardIncludes.h"
#include "cmCommand.h"

/** \class cmSetCommand
 * \brief Set a CMAKE variable
 *
 * cmSetCommand sets a variable to a value with expansion.  
 */
class cmSetCommand : public cmCommand
{
public:
  /**
   * This is a virtual constructor for the command.
   */
  virtual cmCommand* Clone() 
    {
    return new cmSetCommand;
    }

  /**
   * This is called when the command is first encountered in
   * the CMakeLists.txt file.
   */
  virtual bool InitialPass(std::vector<std::string> const& args);

  /**
   * This determines if the command gets propagated down
   * to makefiles located in subdirectories.
   */
  virtual bool IsInherited() {return true;}

  /**
   * The name of the command as specified in CMakeList.txt.
   */
  virtual const char* GetName() {return "SET";}
  
  /**
   * Succinct documentation.
   */
  virtual const char* GetTerseDocumentation() 
    {
    return "Set a CMAKE variable to a value";
    }
  
  /**
   * More documentation.
   */
  virtual const char* GetFullDocumentation()
    {
    return
      "SET(VAR [VALUE] [CACHE TYPE DOCSTRING])\n"
      "Within CMAKE sets VAR to the value VALUE. VALUE is expanded before VAR "
      "is set to it. If CACHE is present, then the VAR is put in the cache."
      " TYPE and DOCSTRING are required.  If TYPE is INTERNAL, then the "
      " VALUE is Always written into the cache, replacing any values "
      "existing in the cache.  If it is not a CACHE VAR, then this always "
      "writes into the current makefile.\n"
      "An optional syntax is SET(VAR VALUE1 ... VALUEN).\n"
      "In this case VAR is set to a ; separated list of values.";
    }
  
  cmTypeMacro(cmSetCommand, cmCommand);
};



#endif