anchor.diff:    (unless (null-pointer-p gvalue)
       (when free-content
         (funcall
  -       (get-destroy-function (gvalue-type gvalue))
  +       (intern-destroy-function (gvalue-type gvalue))
          gvalue +gvalue-value-offset+))
       (deallocate-memory gvalue)))
   
  
positive.code: ;; License along with this library; if not, write to the Free Software
  ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  
  ;; $Id: gparam.lisp,v 1.1 2001-01-28 14:18:44 espen Exp $
  
  (in-package "GLIB")
  
  
negative.code: 
  (defun gvalue-get (gvalue)
    (funcall
     (intern-reader-function (gvalue-type gvalue))
     gvalue +gvalue-value-offset+))
  
  (defun gvalue-set (gvalue value)
    (funcall
     (intern-writer-function (gvalue-type gvalue))
     value gvalue +gvalue-value-offset+)
    value)
  
  
  (deftype param-flag-type ()
    '(flags
      :readable
      :writable
      :construct
      :construct-only
      :lax-validation
      :private))
  
  (eval-when (:compile-toplevel :load-toplevel :execute)
    (defclass param (ginstance)
      ((name
        :allocation :alien
        :reader param-name
        :type string)
       (nickname
        :allocation :alien
        :reader param-nickname
        :type string)
       (documentation
        :allocation :alien
        :reader param-documentation
        :type string)
       (flags
        :allocation :alien
        :reader param-flags
        :type param-flag-type)
       (type
        :allocation :alien
        :reader param-type
        :type type-number))
      (:metaclass ginstance-class)
      (:ref "g_param_spec_ref")
      (:unref "g_param_spec_unref")))
  
  
  (defclass param-char (param)
    ((minimum
      :allocation :alien
      :reader param-char-minimum
      :type char)
     (maximum
      :allocation :alien
      :reader param-char-maximum
      :type char)
     (default-value
      :allocation :alien
      :reader param-char-default-value
      :type char))
    (:metaclass ginstance-class))
  
  (defclass param-unsigned-char (param)
    (
  ; (minimum
  ;     :allocation :alien
  ;     :reader param-unsigned-char-minimum
  ;     :type unsigned-char)
  ;    (maximum
  ;     :allocation :alien
  ;     :reader param-unsigned-char-maximum
  ;     :type unsigned-char)
  ;    (default-value
  ;     :allocation :alien
  ;     :reader param-unsigned-char-default-value
  ;     :type unsigned-char)
     )
    (:metaclass ginstance-class)
    (:alien-name "GParamUChar"))
  
  (defclass param-boolean (param)
    ((default-value
       :allocation :alien
       :reader param-boolean-default-value
       :type boolean))
    (:metaclass ginstance-class))
  
  (defclass param-int (param)
    ((minimum
      :allocation :alien
      :reader param-int-minimum
      :type int)
     (maximum
      :allocation :alien
      :reader param-int-maximum
      :type int)
     (default-value
      :allocation :alien
      :reader param-int-default-value
      :type int))
    (:metaclass ginstance-class))
  
  (defclass param-unsigned-int (param)
    ((minimum
      :allocation :alien
      :reader param-unsigned-int-minimum
      :type unsigned-int)
     (maximum
      :allocation :alien
      :reader param-unsigned-int-maximum
      :type unsigned-int)
     (default-value
      :allocation :alien
      :reader param-unsigned-int-default-value
      :type unsigned-int))
    (:metaclass ginstance-class)
    (:alien-name "GParamUInt"))
  
  (defclass param-long (param)
    ((minimum
      :allocation :alien
      :reader param-long-minimum
      :type long)
     (maximum
      :allocation :alien
      :reader param-long-maximum
      :type long)
     (default-value
      :allocation :alien
      :reader param-long-default-value
      :type long))
    (:metaclass ginstance-class))
  
  (defclass param-unsigned-long (param)
    ((minimum
      :allocation :alien
      :reader param-unsigned-long-minimum
      :type unsigned-long)
     (maximum
      :allocation :alien
      :reader param-unsigned-long-maximum
      :type unsigned-long)
     (default-value
      :allocation :alien
      :reader param-unsigned-long-default-value
      :type unsigned-long))
    (:metaclass ginstance-class)
    (:alien-name "GParamULong"))
  
  (defclass param-unichar (param)
    ()
    (:metaclass ginstance-class))
  
  (defclass param-enum (param)
    ((class
      :allocation :alien
      :reader param-enum-class
      :type pointer)
     (default-value
      :allocation :alien
      :reader param-enum-default-value
      :type long))
    (:metaclass ginstance-class))
  
  (defclass param-flags (param)
    ((class
      :allocation :alien
      :reader param-flags-class
      :type pointer)
     (default-value
      :allocation :alien
      :reader param-flags-default-value
      :type long))
    (:metaclass ginstance-class))
  
  (defclass param-single-float (param)
    ((minimum
      :allocation :alien
      :reader param-single-float-minimum
      :type single-float)
     (maximum
      :allocation :alien
      :reader param-single-float-maximum
      :type single-float)
     (default-value
      :allocation :alien
      :reader param-single-float-default-value
      :type single-float)
     (epsilon
      :allocation :alien
      :reader param-single-float-epsilon
      :type single-float))
    (:metaclass ginstance-class)
    (:alien-name "GParamFloat"))
  
  (defclass param-double-float (param)
    ((minimum
      :allocation :alien
      :reader param-double-float-minimum
      :type double-float)
     (maximum
      :allocation :alien
      :reader param-double-float-maximum
      :type double-float)
     (default-value
      :allocation :alien
      :reader param-double-float-default-value
      :type double-float)
     (epsilon
      :allocation :alien
      :reader param-double-float-epsilon
      :type double-float))
    (:metaclass ginstance-class)
    (:alien-name "GParamDouble"))
  
  (defclass param-string (param)
    ((default-value
      :allocation :alien
      :reader param-string-default-value
      :type string))
    (:metaclass ginstance-class))
  
  (defclass param-param (param)
    ()
    (:metaclass ginstance-class))
  
  (defclass param-boxed (param)
    ()
    (:metaclass ginstance-class))
  
  (defclass param-pointer (param)
    ()
    (:metaclass ginstance-class))
  
  (defclass param-value-array (param)
    ((element-spec
      :allocation :alien
      :reader param-value-array-element-spec
      :type param)
     (length
      :allocation :alien
      :reader param-value-array-length
      :type unsigned-int))
    (:metaclass ginstance-class))
  
  (defclass param-closure (param)
    ()
    (:metaclass ginstance-class))
  
  (defclass param-object (param)
    ()
    (:metaclass ginstance-class))
  
  
  
  