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view src/luan/interp/LeExpr.java @ 49:8ede219cd111
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git-svn-id: https://luan-java.googlecode.com/svn/trunk@50 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Fri, 28 Dec 2012 19:35:04 +0000 |
parents | 64ecb7a3aad7 |
children | 6ca02b188dba |
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package luan.interp; import luan.Luan; import luan.LuanFunction; import luan.LuanException; import luan.LuanSource; final class LeExpr extends BinaryOpExpr { LeExpr(LuanSource.Element se,Expr op1,Expr op2) { super(se,op1,op2); } @Override public Object eval(LuanStateImpl luan) throws LuanException { Object o1 = op1.eval(luan); Object o2 = op2.eval(luan); if( o1 instanceof Number && o2 instanceof Number ) { Number n1 = (Number)o1; Number n2 = (Number)o2; return n1.doubleValue() <= n2.doubleValue(); } if( o1 instanceof String && o2 instanceof String ) { String s1 = (String)o1; String s2 = (String)o2; return s1.compareTo(s2) <= 0; } LuanFunction fn = luan.getBinHandler(se,"__le",o1,o2); if( fn != null ) return Luan.toBoolean( Luan.first(luan.call(fn,se,"__le",o1,o2)) ); fn = luan.getBinHandler(se,"__lt",o1,o2); if( fn != null ) return !Luan.toBoolean( Luan.first(luan.call(fn,se,"__lt",o2,o1)) ); throw new LuanException( luan, se, "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) ); } }