Mercurial Hosting > luan
diff src/luan/impl/ConcatExpr.java @ 166:4eaee12f6c65
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 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/luan/impl/ConcatExpr.java Sun Jun 22 04:17:38 2014 +0000 @@ -0,0 +1,31 @@ +package luan.impl; + +import luan.Luan; +import luan.LuanFunction; +import luan.LuanException; +import luan.LuanSource; + + +final class ConcatExpr extends BinaryOpExpr { + + ConcatExpr(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); + String s1 = luan.bit(op1.se()).toString(o1); + String s2 = luan.bit(op2.se()).toString(o2); +/* + if( s1 != null && s2 != null ) + return s1 + s2; + LuanFunction fn = luan.getBinHandler(se,"__concat",o1,o2); + if( fn != null ) + return Luan.first(luan.call(fn,se,"__concat",o1,o2)); + String type = s1==null ? Luan.type(o1) : Luan.type(o2); + throw new LuanException( luan, se, "attempt to concatenate a " + type + " value" ); +*/ + return s1 + s2; + } +}