It'd be good if etags recognised perl constants like

    use constant FOO => 123;

which defines a subroutine called FOO, basically the same as if you
wrote

    sub FOO () { return 123 }


"constant::defer" in the diff below is one of my things.  Is it too
cheeky to slip that in?  It's on cpan, but probably used only by me as
yet :-).


2009-11-27  Kevin Ryde  <user42@zip.com.au>

	* etags.c (Perl_functions): Tag "use constant" subs too.

	* maintaining.texi (Tag Syntax): Add Perl "use constant".