Mercurial Hosting > luan
annotate core/src/luan/impl/UpValue.java @ 664:71f8f5075df8
compile FnDef
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 07 Apr 2016 15:11:52 -0600 |
parents | c6bcb8859b93 |
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1 package luan.impl; |
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2 |
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3 import luan.DeepCloner; |
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4 import luan.DeepCloneable; |
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5 import luan.LuanException; |
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6 |
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7 |
664 | 8 public final class UpValue implements DeepCloneable { |
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9 private Object[] stack; |
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10 private int index; |
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11 private boolean isClosed = false; |
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12 private Object value; |
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13 |
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14 UpValue(Object[] stack,int index) { |
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15 this.stack = stack; |
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16 this.index = index; |
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17 } |
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18 |
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19 UpValue(Object value) { |
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20 this.value = value; |
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21 this.isClosed = true; |
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22 } |
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23 |
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24 private UpValue() {} |
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25 |
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26 @Override public UpValue shallowClone() { |
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27 return new UpValue(); |
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28 } |
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29 |
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30 @Override public void deepenClone(DeepCloneable dc,DeepCloner cloner) { |
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31 UpValue clone = (UpValue)dc; |
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32 clone.isClosed = isClosed; |
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33 if( isClosed ) { |
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34 clone.value = cloner.get(value); |
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35 } else { |
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36 clone.stack = cloner.deepClone(stack); |
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37 clone.index = index; |
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38 } |
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39 } |
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40 |
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41 Object get() { |
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42 return isClosed ? value : stack[index]; |
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43 } |
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44 |
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45 void set(Object value) { |
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46 if( isClosed ) { |
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47 this.value = value; |
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48 } else { |
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49 stack[index] = value; |
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50 } |
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51 } |
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52 |
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53 void close() { |
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54 value = stack[index]; |
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55 isClosed = true; |
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56 stack = null; |
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57 } |
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664 | 59 public static interface Getter { |
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60 public UpValue get(LuanStateImpl luan) throws LuanException; |
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61 } |
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62 |
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63 static final class StackGetter implements Getter { |
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64 private final int index; |
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65 |
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66 StackGetter(int index) { |
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67 this.index = index; |
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68 } |
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69 |
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70 public UpValue get(LuanStateImpl luan) { |
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71 return luan.getUpValue(index); |
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72 } |
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73 } |
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74 |
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75 static final class NestedGetter implements Getter { |
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76 private final int index; |
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78 NestedGetter(int index) { |
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79 this.index = index; |
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80 } |
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81 |
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82 public UpValue get(LuanStateImpl luan) { |
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83 return luan.closure().upValues()[index]; |
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84 } |
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85 } |
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86 |
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87 static final class ValueGetter implements Getter { |
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88 private final UpValue upValue; |
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89 |
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90 ValueGetter(Object value) { |
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91 this.upValue = new UpValue(value); |
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92 } |
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93 |
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94 public UpValue get(LuanStateImpl luan) { |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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95 return upValue; |
34
0cdc1da466ee
implement _G and _ENV
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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96 } |
86
6db8f286fa6c
_ENV is per module, not global
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
78
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changeset
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97 } |
34
0cdc1da466ee
implement _G and _ENV
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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98 |
32
c3eab5a3ce3c
implement closures
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
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99 } |