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    use Emacs::Lisp qw(%booboo %upcase_region);
    $booboo{\*error_conditions} = [\*booboo, \*error];
    $can_upcase = ! $upcase_region{\*disabled};

    ; Lisp fragment
    (put 'booboo 'error-conditions '(booboo error))
    (setq can-upcase (not (get 'upcase-region 'disabled)))

See also the C<setq> function below.

=head2 Macros

Lisp I<macros>, such as C<setq> and C<defun>, do not work the same way
functions do, although they are invoked using the function syntax.
(Here you see the vast philosophical chasm separating Perl from Lisp.
While Perl might have five syntaxes to mean the same thing, Lisp has
one syntax with two meanings!)

Some macros are equivalent to Perl operators, such as C<if> and
C<while>.  Others have meanings peculiar to Lisp.  A few macros are
implemented in Emacs::Lisp.  They are described below.  If you try to