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comparison src/luan/impl/ConcatExpr.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/ConcatExpr.java@6ca02b188dba
children
comparison
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165:94bbc4cbc106 166:4eaee12f6c65
1 package luan.impl;
2
3 import luan.Luan;
4 import luan.LuanFunction;
5 import luan.LuanException;
6 import luan.LuanSource;
7
8
9 final class ConcatExpr extends BinaryOpExpr {
10
11 ConcatExpr(LuanSource.Element se,Expr op1,Expr op2) {
12 super(se,op1,op2);
13 }
14
15 @Override public Object eval(LuanStateImpl luan) throws LuanException {
16 Object o1 = op1.eval(luan);
17 Object o2 = op2.eval(luan);
18 String s1 = luan.bit(op1.se()).toString(o1);
19 String s2 = luan.bit(op2.se()).toString(o2);
20 /*
21 if( s1 != null && s2 != null )
22 return s1 + s2;
23 LuanFunction fn = luan.getBinHandler(se,"__concat",o1,o2);
24 if( fn != null )
25 return Luan.first(luan.call(fn,se,"__concat",o1,o2));
26 String type = s1==null ? Luan.type(o1) : Luan.type(o2);
27 throw new LuanException( luan, se, "attempt to concatenate a " + type + " value" );
28 */
29 return s1 + s2;
30 }
31 }