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annotate core/src/luan/impl/SetTableEntry.java @ 404:d55e873e1f0d

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metatables now only apply to tables
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 29 Apr 2015 07:04:40 -0600
parents 05eb2837ddbf
children 3e68917a0dc6
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 112
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1 package luan.impl;
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3 import luan.LuanException;
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4 import luan.LuanTable;
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5 import luan.Luan;
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6 import luan.LuanFunction;
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7 import luan.LuanSource;
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8 import luan.modules.JavaLuan;
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11 final class SetTableEntry extends CodeImpl implements Settable {
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12 private final Expr tableExpr;
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13 private final Expr keyExpr;
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15 SetTableEntry(LuanSource.Element se,Expr tableExpr,Expr keyExpr) {
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16 super(se);
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17 this.tableExpr = tableExpr;
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18 this.keyExpr = keyExpr;
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19 }
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21 @Override public void set(LuanStateImpl luan,Object value) throws LuanException {
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22 newindex( luan, tableExpr.eval(luan), keyExpr.eval(luan), value );
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23 }
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25 private void newindex(LuanStateImpl luan,Object t,Object key,Object value) throws LuanException {
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26 if( t instanceof LuanTable ) {
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27 LuanTable table = (LuanTable)t;
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28 Object h = luan.getHandler("__newindex",table);
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29 if( h==null || table.get(key)!=null ) {
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30 try {
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31 table.put(key,value);
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32 } catch(IllegalArgumentException e) {
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33 throw luan.bit(se).exception(e);
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34 } catch(UnsupportedOperationException e) {
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35 throw luan.bit(se).exception(e);
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36 }
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37 return;
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38 }
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39 if( h instanceof LuanFunction ) {
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40 LuanFunction fn = (LuanFunction)h;
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41 luan.bit(se).call(fn,"__newindex",new Object[]{t,key,value});
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42 return;
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43 }
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44 newindex(luan,h,key,value);
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45 }
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46 if( !JavaLuan.__newindex(luan,t,key,value) )
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47 throw luan.bit(se).exception( "attempt to index '"+tableExpr.se().text()+"' (a " + Luan.type(t) + " value)" );
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48 }
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50 }