Question on TREE_CODE_CLASS of 's'

[Richard Kenner]

    > Because I thought it would be useful to use the class to distinguish
    > statements.  Also, if they aren't in that class, then what's it for?

    Nothing anymore, AFAIK.

Is there any reason *not* to use that class and put the language-defined
statement nodes in that class?  That's what I'm doing for Ada, for example,
and I'm wondering why we can't do it for every language.