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996
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1 // Closure.h
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2
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3 #ifndef CLOSURE_H_RAIL_1
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4 #define CLOSURE_H_RAIL_1
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5
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6 #include "Binding.h"
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7 #include "Vec.h"
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8 #include "Dir.h"
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9 #include "Var.h"
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10 #include "Board.h"
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11
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12 class Closure : public Var
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13 {
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14 public:
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15 Closure(std::map<std::string, Binding> const & newEnv,
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16 Board const & newFunc,
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17 Vec newPos,
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18 Dir::t newDir)
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19 : environment(newEnv)
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20 , function(newFunc)
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21 , position(newPos)
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22 , direction(newDir) {}
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23 virtual ~Closure() {}
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24
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25 virtual StringVar * getString(void)
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26 {
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27 return NULL;
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28 }
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29
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30 virtual ListVar * getList(void)
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31 {
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32 return NULL;
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33 }
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34
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35 virtual NilVar * getNil(void)
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36 {
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37 return NULL;
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38 }
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39
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40 virtual Closure * getClosure(void)
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41 {
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42 return this;
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43 }
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44
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45 virtual std::string toString(void) const
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46 {
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47 return "(closure '" + function.getName() + "')";
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48 }
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49
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50 std::map<std::string, Binding> const & getEnvironment(void) const
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51 {
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52 return environment;
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53 }
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54
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55 Board const & getFunction(void) const
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56 {
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57 return function;
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58 }
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59
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60 Vec getPosition(void) const
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61 {
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62 return position;
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63 }
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64
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65 Dir::t getDirection(void) const
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66 {
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67 return direction;
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68 }
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69 private:
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70 Closure();
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71 Closure(Closure const &);
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72 Closure & operator=(Closure const &) { return *this; }
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73 private:
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74 std::map<std::string, Binding> environment;
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75 Board const & function;
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76 Vec position;
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77 Dir::t direction;
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78 };
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79
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80 #endif
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