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annotate src/luan/interp/SetStmt.java @ 11:b7d7069fee58

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add assignment statement and CmdLine git-svn-id: https://luan-java.googlecode.com/svn/trunk@12 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 22 Nov 2012 10:51:56 +0000
parents 24fd6381caca
children 3b22ffbdb83a
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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 java.util.List;
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4 import luan.Lua;
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5 import luan.LuaState;
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6 import luan.LuaException;
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7 import luan.LuaTable;
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10 final class SetStmt implements Stmt {
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12 static class Var {
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13 final Expr table;
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14 final Expr key;
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16 Var(Expr table,Expr key) {
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17 this.table = table;
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18 this.key = key;
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19 }
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20 }
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22 private final Var[] vars;
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23 private final Expressions expressions;
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25 SetStmt(Var[] vars,Expressions expressions) {
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26 this.vars = vars;
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27 this.expressions = expressions;
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28 }
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30 @Override public void eval(LuaState lua) throws LuaException {
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31 List vals = expressions.eval(lua);
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32 int n = vals.size();
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33 for( int i=0; i<vars.length; i++ ) {
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34 Var var = vars[i];
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35 Object t = var.table.eval(lua);
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36 if( !(t instanceof LuaTable) )
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37 throw new LuaException( "attempt to index a " + Lua.type(t) + " value" );
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38 LuaTable tbl = (LuaTable)t;
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39 Object key = var.key.eval(lua);
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40 Object val = i < n ? vals.get(i) : null;
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41 tbl.set(key,val);
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42 }
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43 }
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45 }