Peter Dalgaard wrote: > > (*) unless you mess with match.call() or substitute() and the like. But > that's a different story. >
different or not, it is a story that happens quite often -- too often, perhaps -- to the degree that one may be tempted to say that the semantics of argument passing in r is a mess. which of course is not true, but since it is possible to mess with match.call & co, people (including r core) do mess with them, and the result is obviously a mess. on top of the clear call-by-need semantics -- and on the surface, you cannot tell how the arguments of a function will be taken (by value? by reference? not at all?), which in effect looks like a messy semantics. vQ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
