(setf (file-size "nonexistent") 10)

[Sam S. <sd...@gn...>]

What should (setf (file-size "nonexistent") 10) do?
(for nonexistent file "nonexistent").
it can either signal an error (like truncate(2) does)
or create the file.
I prefer useful behavior to an error, so unless I hear strong opposing 
opinions, I will implement the latter behavior.