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1 //
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2 // ノードクラス
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3 //
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4 // Chihiro.SAKAMOTO
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5 //
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6 #ifndef __NODE_H__
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7 #define __NODE_H__
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8
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9 #include <string>
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10
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11 // ノードの命令・トークン種別
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12 enum {
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13 OP_EOF = -1,
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14 OP_NEG,
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15 OP_PLUS,
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16 OP_MINUS,
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17 OP_TIMES,
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18 OP_DIVIDE,
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19 OP_VALUE,
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20 OP_CONST,
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21 OP_OPAR,
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22 OP_CPAR,
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23 OP_EQU,
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24 OP_NEWLINE,
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25 OP_PRINT,
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26 OP_LIST,
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27 OP_ERROR,
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28 } ;
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29
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30 // ノード
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31
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32 class calc_driver;
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33 class cnode {
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34 public:
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35 cnode(int op, cnode *left, cnode *right=0)
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36 : op_(op), left_(left), right_(right), value_(0), string_(0)
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37 {
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38 }
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39 cnode(int op, int value)
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40 : op_(op), left_(0), right_(0), value_(value), string_(0)
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41 {
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42 }
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43 cnode(int op, std::string *str)
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44 : op_(op), left_(0), right_(0), value_(0), string_(str)
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45 {
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46 }
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47 virtual ~cnode()
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48 {
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49 delete left_;
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50 delete right_;
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51 delete string_;
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52 }
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53
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54 int expr(calc_driver *driver) const;
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55
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56 int op() const { return op_; }
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57 int value() const { return value_; }
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58 const std::string &string() const { return *string_; }
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59 const cnode *left() const { return left_; }
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60 const cnode *right() const { return right_; }
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61
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62 protected:
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63 int op_;
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64 int value_;
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65 std::string *string_;
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66 cnode *left_;
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67 cnode *right_;
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68 } ;
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69
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70 #endif
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