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#ifndef VARIABLES_H
#define VARIABLES_H
#include <boost/shared_ptr.hpp>
#include <boost/optional.hpp>
#include <glibmm/ustring.h>
#include <libxml++/nodes/element.h>
#include <libxml++/attribute.h>
class RowUser;
class VariableImpl {
public:
virtual const Glib::ustring & value() const = 0;
protected:
VariableImpl(const Glib::ustring & src);
const Glib::ustring source;
Glib::ustring name;
boost::optional<Glib::ustring> defaultValue;
};
class Variable {
public:
typedef boost::shared_ptr<VariableImpl> VariableImplPtr;
Variable(xmlpp::Attribute *);
Variable(xmlpp::Element *);
Variable(const Glib::ustring & s);
operator const Glib::ustring & () const { return var->value(); }
const Glib::ustring & operator()() const { return var->value(); }
private:
friend class VariableParse;
static VariableImplPtr create(const Glib::ustring & s, RowUser * dep = NULL);
VariableImplPtr var;
};
#endif
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