Mercurial Hosting > luan
view src/luan/interp/BinaryOpExpr.java @ 36:2a35154aec14
implement more basic lib functions
git-svn-id: https://luan-java.googlecode.com/svn/trunk@37 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
---|---|
date | Tue, 18 Dec 2012 09:53:42 +0000 |
parents | e51906de0f11 |
children | 8a57ebfdfd78 |
line wrap: on
line source
package luan.interp; import luan.Lua; import luan.LuaTable; import luan.LuaFunction; import luan.LuaException; abstract class BinaryOpExpr implements Expr { final Expr op1; final Expr op2; BinaryOpExpr(Expr op1,Expr op2) { this.op1 = op1; this.op2 = op2; } static final LuaFunction getBinHandler(String op,Object o1,Object o2) throws LuaException { LuaFunction f1 = Utils.getHandlerFunction(op,o1); if( f1 != null ) return f1; return Utils.getHandlerFunction(op,o2); } static final Object arithmetic(LuaStateImpl lua,String op,Object o1,Object o2) throws LuaException { LuaFunction fn = getBinHandler(op,o1,o2); if( fn != null ) return Utils.first(fn.call(lua,o1,o2)); String type = Lua.toNumber(o1)==null ? Lua.type(o1) : Lua.type(o2); throw new LuaException("attempt to perform arithmetic on a "+type+" value"); } }