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annotate src/luan/interp/SetTableEntry.java @ 40:e3624b7cd603

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implement stack trace git-svn-id: https://luan-java.googlecode.com/svn/trunk@41 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 21 Dec 2012 10:45:54 +0000
parents 8a57ebfdfd78
children 64ecb7a3aad7
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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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3 import luan.LuaException;
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4 import luan.LuaTable;
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5 import luan.Lua;
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6 import luan.LuaFunction;
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7 import luan.LuaSource;
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10 final class SetTableEntry extends CodeImpl implements Settable {
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11 private final Expr tableExpr;
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12 private final Expr keyExpr;
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14 SetTableEntry(LuaSource.Element se,Expr tableExpr,Expr keyExpr) {
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15 super(se);
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16 this.tableExpr = tableExpr;
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17 this.keyExpr = keyExpr;
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18 }
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20 @Override public void set(LuaStateImpl lua,Object value) throws LuaException {
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21 newindex( lua, tableExpr.eval(lua), keyExpr.eval(lua), value );
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22 }
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24 private void newindex(LuaStateImpl lua,Object t,Object key,Object value) throws LuaException {
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25 Object h;
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26 if( t instanceof LuaTable ) {
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27 LuaTable table = (LuaTable)t;
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28 Object old = table.put(key,value);
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29 if( old != null )
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30 return;
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31 h = lua.getHandler("__newindex",t);
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32 if( h==null )
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33 return;
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34 table.put(key,old);
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35 } else {
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36 h = lua.getHandler("__newindex",t);
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37 if( h==null )
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38 throw new LuaException( lua, se, "attempt to index a " + Lua.type(t) + " value" );
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39 }
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40 if( h instanceof LuaFunction ) {
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41 LuaFunction fn = (LuaFunction)h;
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42 lua.call(fn,se,"__newindex",t,key,value);
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43 }
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44 newindex(lua,h,key,value);
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45 }
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47 }