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annotate src/luan/interp/LeExpr.java @ 112:f5af13062b10

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fix previous rev git-svn-id: https://luan-java.googlecode.com/svn/trunk@113 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 23 May 2014 22:52:39 +0000
parents 6ca02b188dba
children
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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 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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10 final class LeExpr extends BinaryOpExpr {
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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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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 }