VariantN.opBinaryRight

VariantN opBinaryRight(string op,  T)(T lhs) if ((op ==  "+" ||  op ==  "*")  &&
         is(typeof(opArithmetic!(T,  op)(lhs))))

ditto

VariantN opBinaryRight(string op,  T)(T lhs) if ((op ==  "&" ||  op ==  "|" ||  op ==  "^")  &&
         is(typeof(opLogic!(T,  op)(lhs))))

ditto