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annotate core/src/luan/impl/ForStmt.java @ 576:4723d22062ce

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remove LuanBit
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 13 Jul 2015 20:38:26 -0600
parents 55f9f74f1e55
children d7a85fbe15f1
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.impl;
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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.LuanElement;
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8
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9 final class ForStmt 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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15 ForStmt(LuanElement el,int iVars,int nVars,Expr iterExpr,Stmt block) {
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16 super(el);
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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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23 @Override public void eval(LuanStateImpl luan) throws LuanException {
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24 luan.push( iterExpr.el(), iterExpr.el().text() );
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25 try {
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26 LuanFunction iter = luan.checkFunction( iterExpr.eval(luan) );
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27 String name = iterExpr.el().text();
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28 while(true) {
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29 Object vals = iter.call(luan);
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30 if( vals==null )
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31 break;
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32 if( vals instanceof Object[] ) {
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33 Object[] a = (Object[])vals;
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34 if( a.length==0 || a[0]==null )
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35 break;
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36 for( int i=0; i<nVars; i++ ) {
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37 luan.stackSet( iVars+i, i < a.length ? a[i] : null );
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38 }
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39 } else {
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40 luan.stackSet( iVars, vals );
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41 for( int i=1; i<nVars; i++ ) {
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42 luan.stackSet( iVars+i, null );
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43 }
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44 }
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45 block.eval(luan);
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46 }
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47 } catch(BreakException e) {
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48 } finally {
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49 luan.stackClear(iVars,iVars+nVars);
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50 luan.pop();
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51 }
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52 }
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54 }