Frank Goenninger wrote:
Hi all:
I do have a strange behaviour of a small code snippet ...: (the used macro with-html-output is from CL-WHO - see http://www.weitz.de/cl-who - it generates HTML markup)
(defmacro as-html (&body body) `(with-html-output (*standard-output*) ,@body))
(defmodel simple (family) ((slot-1 :accessor slot-1 :initform (c-in nil) :initarg :slot-1)) (:default-initargs :value (c? (as-html (:h1 (^slot-1))))))
Now when inspecting the result of
(make-instance 'simple :slot-1 "Hi")
I get no value back for slot-1 but simply see
<h1></h1>
... - what the f*ck am I doing wrong ???
Inspecting the instance reveals:
SIMPLE15 is a standard-object. [type: SIMPLE]
Class: #<STANDARD-CLASS SIMPLE> .MD-STATE: :AWAKE .AWAKEN-ON-INIT-P: NIL .CELLS: ((.KIDS . =0/.KIDS/SIMPLE15])) .CELLS-FLUSHED: ((.VALUE . <vld>=1/.VALUE/SIMPLE15])) ADOPT-CT: 0 .MD-NAME: SIMPLE15 .FM-PARENT: NIL .VALUE: "</h1>" ZDBG: NIL .KID-SLOTS: NIL .KIDS: NIL SLOT-1: "Hallo"
Hunh? Slot ".value" is "</h1>" ??
Any help really appreciated ...
The first problem was writing the html to standard output instead of a string, the second problem is that cl-who does not quite work the way you think. What I did was replace as-html with the appropriate with-html-output form and then macroexpand. Give it a try. Meanwhile, this works:
(defpackage #:whofix (:use #:common-lisp #:cells #:cl-who))
(in-package :whofix)
(defmacro as-html (var &body body) `(with-output-to-string (,var) (with-html-output (,var) ,@body) ))
(defmodel simple (family) ((slot-1 :accessor slot-1 :initform (c-in nil) :initarg :slot-1)) (:default-initargs :value (c? (trc "enetering rule" (^slot-1)) (as-html xxx (:h1 (write-string (^slot-1) xxx))))))
(describe (make-instance 'simple :slot-1 "booters"))
;;;0> 4331 enetering rule "booters" ;;;SIMPLE8054 is an instance of #<STANDARD-CLASS SIMPLE>: ;;; The following slots have :INSTANCE allocation: ;;; .MD-STATE :AWAKE ;;; .AWAKEN-ON-INIT-P NIL ;;; .CELLS ((.KIDS . =0/.KIDS/SIMPLE8054])) ;;; .CELLS-FLUSHED ((.VALUE . <vld>=10966/.VALUE/SIMPLE8054])) ;;; ADOPT-CT 0 ;;; .MD-NAME SIMPLE8054 ;;; .FM-PARENT NIL ;;; .VALUE " ;;; ;;;<h1>booters</h1>" ;;; ZDBG NIL ;;; .KID-SLOTS NIL ;;; .KIDS NIL ;;; SLOT-1 "booters"