value.h

////////////////////////////////////////////////////////////////////////////////
// DScript Scripting Language
// Copyright (C) 2003 Bryan "daerid" Ross
//
// Permission to copy, use, modify, sell and distribute this software is
// granted provided this copyright notice appears in all copies. This
// software is provided "as is" without express or implied warranty, and
// with no claim as to its suitability for any purpose.
////////////////////////////////////////////////////////////////////////////////

#ifndef __DSCRIPT_VALUE_H__
#define __DSCRIPT_VALUE_H__

////////////////////////////////////////////////////////////////////////////////
// Standard Library Includes
#include <string>
#include <map>
////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////////
// DScript Includes
#include "instruction.h"
////////////////////////////////////////////////////////////////////////////////

namespace dscript
{
    /// This is the actual value data type that DScript works with.
    struct value
    {
        enum ty
        {
            type_str,
            type_int,
            type_flt        
        };
        ty type;

        value();
        value(int i);
        value(double d);
        value(const std::string& s);
        value(string_table::entry s);

        value(const value& other);
        value& operator = (const value& other);

        value& operator = (const std::string& s);
        value& operator = (string_table::entry s);
        value& operator = (int i);
        value& operator = (double d);

        std::string to_str() const;
        int to_int() const;
        double to_flt() const;

        void set_type(ty new_type);
        void clear() { strval = ""; intval = 0; fltval = 0.0; type = type_str; }

        std::string strval;
        int intval;
        double fltval;
    };

    typedef std::map<string_table::entry,value,cmp_ste> dictionary_t;
}

inline std::ostream& operator << (std::ostream& out, const dscript::value& v)
{
    switch(v.type)
    {
    case dscript::value::type_str:
        out << v.strval;
        break;
    case dscript::value::type_int:
        out << v.intval;
        break;
    case dscript::value::type_flt:
        out << v.fltval;
        break;
    }
    return out;
}

#endif//__DSCRIPT_VALUE_H__