Mercurial Hosting > luan
annotate core/src/luan/impl/EqExpr.java @ 645:859c0dedc8b6
remove LuanSource
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 29 Mar 2016 18:09:51 -0600 |
parents | 4723d22062ce |
children | 8e8c30b72e9b |
rev | line source |
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1 package luan.impl; |
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2 |
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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 |
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9 |
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10 final class EqExpr extends BinaryOpExpr { |
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11 |
645 | 12 EqExpr(Expr op1,Expr op2) { |
13 super(op1,op2); | |
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14 } |
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15 |
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16 @Override public Object eval(LuanStateImpl luan) throws LuanException { |
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17 return eq(luan); |
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18 } |
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19 |
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20 private boolean eq(LuanStateImpl luan) throws LuanException { |
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21 Object o1 = op1.eval(luan); |
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22 Object o2 = op2.eval(luan); |
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23 if( o1 == o2 || o1 != null && o1.equals(o2) ) |
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24 return true; |
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25 if( o1 instanceof Number && o2 instanceof Number ) { |
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26 Number n1 = (Number)o1; |
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27 Number n2 = (Number)o2; |
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28 return n1.doubleValue() == n2.doubleValue(); |
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29 } |
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30 if( o1 instanceof byte[] && o2 instanceof byte[] ) { |
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31 byte[] b1 = (byte[])o1; |
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32 byte[] b2 = (byte[])o2; |
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33 return Arrays.equals(b1,b2); |
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34 } |
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35 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) ) |
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36 return false; |
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37 LuanTable t1 = (LuanTable)o1; |
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38 LuanTable t2 = (LuanTable)o2; |
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39 LuanTable mt1 = t1.getMetatable(); |
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40 LuanTable mt2 = t2.getMetatable(); |
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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.rawGet("__eq"); |
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44 if( f == null || !f.equals(mt2.rawGet("__eq")) ) |
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45 return false; |
645 | 46 LuanFunction fn = luan.checkFunction(f); |
47 return luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) ); | |
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48 } |
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49 |
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50 @Override public String toString() { |
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51 return "(EqExpr "+op1+" "+op2+")"; |
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52 } |
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53 } |