I have the following user customisation declaration.
(defgroup px-initial-frame nil
"Customisation group for position of initial frame."
:group 'convenience)
(defcustom px-frame-pos (cons 8 8)
"Position of initial frame."
:type 'sexp
:group 'px-initial-frame)
At some point I want to save some computed values. I aw using
(custom-declare-variable 'px-frame-pos (cons lft top))
Which is reporting
Debugger entered--Lisp error: (wrong-number-of-arguments (3 . 3) 2)
custom-declare-variable(typex-frame-pos (1270 . 1223))
What is going wrong and how can this problem get fixed?