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comparison src/luan/interp/ConcatExpr.java @ 49:8ede219cd111

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add WebShell 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>
date Fri, 28 Dec 2012 19:35:04 +0000
parents 64ecb7a3aad7
children d6c454b7f58c
comparison
equal deleted inserted replaced
48:64ecb7a3aad7 49:8ede219cd111
10 10
11 ConcatExpr(LuanSource.Element se,Expr op1,Expr op2) { 11 ConcatExpr(LuanSource.Element se,Expr op1,Expr op2) {
12 super(se,op1,op2); 12 super(se,op1,op2);
13 } 13 }
14 14
15 @Override public Object eval(LuanStateImpl lua) throws LuanException { 15 @Override public Object eval(LuanStateImpl luan) throws LuanException {
16 Object o1 = op1.eval(lua); 16 Object o1 = op1.eval(luan);
17 Object o2 = op2.eval(lua); 17 Object o2 = op2.eval(luan);
18 String s1 = Luan.asString(o1); 18 String s1 = Luan.asString(o1);
19 String s2 = Luan.asString(o2); 19 String s2 = Luan.asString(o2);
20 if( s1 != null && s2 != null ) 20 if( s1 != null && s2 != null )
21 return s1 + s2; 21 return s1 + s2;
22 LuanFunction fn = lua.getBinHandler(se,"__concat",o1,o2); 22 LuanFunction fn = luan.getBinHandler(se,"__concat",o1,o2);
23 if( fn != null ) 23 if( fn != null )
24 return Luan.first(lua.call(fn,se,"__concat",o1,o2)); 24 return Luan.first(luan.call(fn,se,"__concat",o1,o2));
25 String type = s1==null ? Luan.type(o1) : Luan.type(o2); 25 String type = s1==null ? Luan.type(o1) : Luan.type(o2);
26 throw new LuanException( lua, se, "attempt to concatenate a " + type + " value" ); 26 throw new LuanException( luan, se, "attempt to concatenate a " + type + " value" );
27 } 27 }
28 } 28 }