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diff src/luan/interp/SubExpr.java @ 2:4da26b11d12a
start interp
git-svn-id: https://luan-java.googlecode.com/svn/trunk@3 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Wed, 14 Nov 2012 08:53:25 +0000 |
parents | |
children | 7a2cdbc5767f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/luan/interp/SubExpr.java Wed Nov 14 08:53:25 2012 +0000 @@ -0,0 +1,19 @@ +package luan.interp; + +import luan.Lua; +import luan.LuaNumber; +import luan.LuaException; + + +final class SubExpr extends BinaryOpExpr { + + SubExpr(Expr op1,Expr op2) { + super(op1,op2); + } + + @Override Object eval() throws LuaException { + double n1 = Lua.toNumber(op1.eval()).value(); + double n2 = Lua.toNumber(op2.eval()).value(); + return new LuaNumber( n1 - n2 ); + } +}