idlwave-last-valid-char

idlwave-last-valid-char is a compiled Lisp function in `idlwave.el'.

(idlwave-last-valid-char)

Return the last character before point which is not white or a comment
and also not part of the current identifier. Since we do this in
order to identify places where keywords are, we consider the initial
`/' of a keyword as part of the identifier.
This function is not general, can only be used for completion stuff.