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annotate core/src/luan/impl/EqExpr.java @ 363:17b02b56d806

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fix LuanPropertyTable.asMap(); fix binary==binary;
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 16 Apr 2015 10:12:58 -0600
parents 2456ef7ada02
children d55e873e1f0d
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1 package luan.impl;
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3 import java.util.Arrays;
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4 import luan.Luan;
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5 import luan.LuanFunction;
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6 import luan.LuanTable;
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7 import luan.LuanException;
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8 import luan.LuanSource;
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9 import luan.LuanBit;
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12 final class EqExpr extends BinaryOpExpr {
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14 EqExpr(LuanSource.Element se,Expr op1,Expr op2) {
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15 super(se,op1,op2);
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16 }
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18 @Override public Object eval(LuanStateImpl luan) throws LuanException {
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19 return eq(luan);
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20 }
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22 private boolean eq(LuanStateImpl luan) throws LuanException {
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23 Object o1 = op1.eval(luan);
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24 Object o2 = op2.eval(luan);
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25 if( o1 == o2 || o1 != null && o1.equals(o2) )
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26 return true;
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27 if( o1 instanceof Number && o2 instanceof Number ) {
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28 Number n1 = (Number)o1;
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29 Number n2 = (Number)o2;
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30 return n1.doubleValue() == n2.doubleValue();
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31 }
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32 if( o1 instanceof byte[] && o2 instanceof byte[] ) {
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33 byte[] b1 = (byte[])o1;
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34 byte[] b2 = (byte[])o2;
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35 return Arrays.equals(b1,b2);
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36 }
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37 if( o1==null || o2==null || !o1.getClass().equals(o2.getClass()) )
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38 return false;
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39 LuanTable mt1 = luan.getMetatable(o1);
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40 LuanTable mt2 = luan.getMetatable(o2);
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41 if( mt1==null || mt2==null )
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42 return false;
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43 Object f = mt1.get("__eq");
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44 if( f == null || !f.equals(mt2.get("__eq")) )
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45 return false;
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46 LuanBit bit = luan.bit(se);
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47 LuanFunction fn = bit.checkFunction(f);
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48 return Luan.toBoolean( Luan.first(bit.call(fn,"__eq",new Object[]{o1,o2})) );
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49 }
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51 @Override public String toString() {
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52 return "(EqExpr "+op1+" "+op2+")";
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53 }
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54 }