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view src/luan/interp/AddExpr.java @ 43:80b67b1a653c
implement string lib
git-svn-id: https://luan-java.googlecode.com/svn/trunk@44 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Tue, 25 Dec 2012 03:42:42 +0000 |
parents | e3624b7cd603 |
children | 57054fa43189 |
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package luan.interp; import luan.Lua; import luan.LuaNumber; import luan.LuaException; import luan.LuaSource; final class AddExpr extends BinaryOpExpr { AddExpr(LuaSource.Element se,Expr op1,Expr op2) { super(se,op1,op2); } @Override public Object eval(LuaStateImpl lua) throws LuaException { Object o1 = op1.eval(lua); Object o2 = op2.eval(lua); LuaNumber n1 = Lua.toNumber(o1); LuaNumber n2 = Lua.toNumber(o2); if( n1 != null && n2 != null ) return new LuaNumber( n1.value() + n2.value() ); return arithmetic(lua,"__add",o1,o2); } }