Mercurial Hosting > luan
annotate core/src/luan/impl/LeExpr.java @ 171:3dcb0f9bee82
add core component
git-svn-id: https://luan-java.googlecode.com/svn/trunk@172 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Sun, 22 Jun 2014 05:41:22 +0000 |
parents | src/luan/impl/LeExpr.java@4eaee12f6c65 |
children | f2c6c22cddc0 |
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1 package luan.impl; |
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2 |
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3 import luan.Luan; |
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4 import luan.LuanFunction; |
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5 import luan.LuanException; |
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6 import luan.LuanSource; |
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7 import luan.LuanBit; |
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8 |
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9 |
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10 final class LeExpr extends BinaryOpExpr { |
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11 |
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12 LeExpr(LuanSource.Element se,Expr op1,Expr op2) { |
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13 super(se,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 Object o1 = op1.eval(luan); |
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18 Object o2 = op2.eval(luan); |
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19 if( o1 instanceof Number && o2 instanceof Number ) { |
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20 Number n1 = (Number)o1; |
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21 Number n2 = (Number)o2; |
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22 return n1.doubleValue() <= n2.doubleValue(); |
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23 } |
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24 if( o1 instanceof String && o2 instanceof String ) { |
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25 String s1 = (String)o1; |
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26 String s2 = (String)o2; |
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27 return s1.compareTo(s2) <= 0; |
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28 } |
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29 LuanBit bit = luan.bit(se); |
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30 LuanFunction fn = bit.getBinHandler("__le",o1,o2); |
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31 if( fn != null ) |
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32 return Luan.toBoolean( Luan.first(bit.call(fn,"__le",new Object[]{o1,o2})) ); |
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33 fn = bit.getBinHandler("__lt",o1,o2); |
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34 if( fn != null ) |
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35 return !Luan.toBoolean( Luan.first(bit.call(fn,"__lt",new Object[]{o2,o1})) ); |
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36 throw bit.exception( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) ); |
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37 } |
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38 } |