State_Class.h

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#pragma once
#ifndef __STATE_CLASS_H__
#define __STATE_CLASS_H__
 
#include <memory>
#include <string>
 
 
namespace DesignPatternExamples_cpp
{
 
    enum CurrentState
    {
        Initial,                
        NormalText,             
        DoubleQuotedText,       
        SingleQuotedText,       
        EscapedDoubleQuoteText, 
        EscapedSingleQuoteText, 
        StartComment,           
        LineComment,            
        BlockComment,           
        EndBlockComment,        
        Done                    
    };
 
 
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    // Interface definitions
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
    const char EOF_CHAR = static_cast<char>(0xff);
 
 
    //########################################################################
    //########################################################################
 
 
    struct IStateContext
    {
        using shared_ptr_t = std::shared_ptr<IStateContext>;
 
        virtual ~IStateContext() {}
 
        virtual char GetNextCharacter() = 0;
 
        virtual void OutputCharacter(char character) = 0;
    };
 
 
    //########################################################################
    //########################################################################
 
 
    struct IStateBehavior
    {
        using shared_ptr_t = std::shared_ptr<IStateBehavior>;
 
        virtual ~IStateBehavior() {}
 
        virtual CurrentState GoNext(IStateContext* context) = 0;
    };
 
 
 
 
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    // State context definition
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 
    class StateContext_Class
    {
    private:
        std::unique_ptr<IStateContext> _stateContextimpl;
 
    public:
        StateContext_Class();
 
 
        //--------------------------------------------------------------------
        // StateContext_Class public entry points.
        //--------------------------------------------------------------------
 
        std::string RemoveComments(std::string text);
    };
 
} // end namespace
 
#endif // __STATE_CLASS_H__