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annotate src/luan/interp/EqExpr.java @ 37:8a57ebfdfd78
add JavaLib
git-svn-id: https://luan-java.googlecode.com/svn/trunk@38 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 20 Dec 2012 02:36:07 +0000 |
parents | e51906de0f11 |
children | e3624b7cd603 |
rev | line source |
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7
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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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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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2 |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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3 import luan.Lua; |
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4 import luan.LuaNumber; |
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5 import luan.LuaFunction; |
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6 import luan.LuaTable; |
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7 import luan.LuaException; |
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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 |
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12 EqExpr(Expr op1,Expr op2) { |
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13 super(op1,op2); |
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14 } |
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15 |
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16 @Override public Object eval(LuaStateImpl lua) throws LuaException { |
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17 Object o1 = op1.eval(lua); |
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18 Object o2 = op2.eval(lua); |
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19 if( o1 == o2 || o1 != null && o1.equals(o2) ) |
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20 return true; |
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21 if( !o1.getClass().equals(o2.getClass()) ) |
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22 return false; |
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23 LuaTable mt1 = lua.getMetatable(o1); |
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24 LuaTable mt2 = lua.getMetatable(o2); |
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25 if( mt1==null || mt2==null ) |
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26 return false; |
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27 Object f = mt1.get("__eq"); |
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28 if( f == null || !f.equals(mt2.get("__eq")) ) |
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29 return null; |
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30 LuaFunction fn = Lua.checkFunction(f); |
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31 return Lua.toBoolean( Utils.first(fn.call(lua,o1,o2)) ); |
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32 } |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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33 } |