text: //////////////////////////////////////////////////////////////////////////
  //
  //  Copyright (c) 2007-2010, Image Engine Design Inc. All rights reserved.
  //
  //  Redistribution and use in source and binary forms, with or without
  //  modification, are permitted provided that the following conditions are
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  //       notice, this list of conditions and the following disclaimer.
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  //       notice, this list of conditions and the following disclaimer in the
  //       documentation and/or other materials provided with the distribution.
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  //////////////////////////////////////////////////////////////////////////
  
  #ifndef IE_CORE_VALIDATEDSTRINGPARAMETER_H
  #define IE_CORE_VALIDATEDSTRINGPARAMETER_H
  
  #include "IECore/Export.h"
  #include "IECore/SimpleTypedParameter.h"
  
  namespace IECore
  {
  
  /// This class implements a StringParameter object with validation
  /// of the value based on regular expressions.
  class IECORE_API ValidatedStringParameter : public StringParameter
  {
  	public :
  
  		IE_CORE_DECLARERUNTIMETYPED( ValidatedStringParameter, StringParameter );
  
  		ValidatedStringParameter( const std::string &name, const std::string &description,
  			const std::string &regex, const std::string &regexDescription = "", const std::string &defaultValue = "", bool allowEmptyString = true,
  			const StringParameter::PresetsContainer &presets = StringParameter::PresetsContainer(), bool presetsOnly = false, ConstCompoundObjectPtr userData = nullptr );
  
  		const std::string &regex() const;
  		const std::string &regexDescription() const;
  		bool allowEmptyString() const;
  
  		/// Implemented to return true only if value is an instance of StringData and
  		/// the contained string matches the regular expression specified in the constructor.
  		bool valueValid( const Object *value, std::string *reason = nullptr ) const override;
  
  	private :
  
  		std::string m_regex;
  		std::string m_regexDescription;
  		bool m_allowEmptyString;
  
  };
  
  IE_CORE_DECLAREPTR( ValidatedStringParameter )
  
  } // namespace IECore
  
  #endif // IE_CORE_VALIDATEDSTRINGPARAMETER_H
  