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comparison src/luan/impl/SubExpr.java @ 166:4eaee12f6c65

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move luan/interp to impl git-svn-id: https://luan-java.googlecode.com/svn/trunk@167 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 22 Jun 2014 04:17:38 +0000
parents src/luan/interp/SubExpr.java@8ede219cd111
children
comparison
equal deleted inserted replaced
165:94bbc4cbc106 166:4eaee12f6c65
1 package luan.impl;
2
3 import luan.Luan;
4 import luan.LuanException;
5 import luan.LuanSource;
6
7
8 final class SubExpr extends BinaryOpExpr {
9
10 SubExpr(LuanSource.Element se,Expr op1,Expr op2) {
11 super(se,op1,op2);
12 }
13
14 @Override public Object eval(LuanStateImpl luan) throws LuanException {
15 Object o1 = op1.eval(luan);
16 Object o2 = op2.eval(luan);
17 Number n1 = Luan.toNumber(o1);
18 Number n2 = Luan.toNumber(o2);
19 if( n1 != null && n2 != null )
20 return n1.doubleValue() - n2.doubleValue();
21 return arithmetic(luan,"__sub",o1,o2);
22 }
23 }