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annotate src/luan/interp/GenericForStmt.java @ 49:8ede219cd111
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git-svn-id: https://luan-java.googlecode.com/svn/trunk@50 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Fri, 28 Dec 2012 19:35:04 +0000 |
parents | 64ecb7a3aad7 |
children | 6ca02b188dba |
rev | line source |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.interp; |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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2 |
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3 import luan.Luan; |
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4 import luan.LuanException; |
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5 import luan.LuanFunction; |
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6 import luan.LuanSource; |
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7 |
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8 |
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9 final class GenericForStmt extends CodeImpl implements Stmt { |
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10 private final int iVars; |
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11 private final int nVars; |
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12 private final Expr iterExpr; |
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13 private final Stmt block; |
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14 |
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15 GenericForStmt(LuanSource.Element se,int iVars,int nVars,Expr iterExpr,Stmt block) { |
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16 super(se); |
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17 this.iVars = iVars; |
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18 this.nVars = nVars; |
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19 this.iterExpr = iterExpr; |
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20 this.block = block; |
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21 } |
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22 |
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23 @Override public void eval(LuanStateImpl luan) throws LuanException { |
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24 LuanFunction iter = luan.checkFunction( se, iterExpr.eval(luan) ); |
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25 try { |
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26 while(true) { |
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27 Object[] vals = luan.call(iter,iterExpr.se(),iterExpr.se().text()); |
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28 if( vals.length==0 || vals[0]==null ) |
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29 break; |
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30 for( int i=0; i<nVars; i++ ) { |
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31 luan.stackSet( iVars+i, i < vals.length ? vals[i] : null ); |
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32 } |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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33 block.eval(luan); |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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34 } |
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35 } catch(BreakException e) { |
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36 } finally { |
49
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37 luan.stackClear(iVars,iVars+nVars); |
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38 } |
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39 } |
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40 |
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41 } |