expression_node_interface.h

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// Based on "Design Patterns: Elements of Reusable Object-Oriented Software"
// book by Erich Gamma, John Vlissides, Ralph Johnson, and Richard Helm 
//
// Created by Bartosz Rachwal. The National Institute of Advanced Industrial Science and Technology, Japan.

#ifndef STRUCTURAL_FACADE_EXPRESSION_NODE_INTERFACE_H_
#define STRUCTURAL_FACADE_EXPRESSION_NODE_INTERFACE_H_

#include <string>

namespace structural
{
namespace facade
{
class ExpressionNodeInterface
{
    public:
    virtual ~ExpressionNodeInterface() { }

    virtual std::string expression() const = 0;
};
}
}

#endif