(define (readable? obj)
(hashq-ref readables obj))
+;;;
+;;; Writer helpers
+;;;
+
+(define (write-component-procedure o file env)
+ "Return #f if circular reference"
+ (cond ((immediate? o) (write o file) #t)
+ ((readable? o) (write (readable-expression o) file) #t)
+ ((excluded? o env) (display #f file) #t)
+ (else
+ (let ((info (object-info o env)))
+ (cond ((not (binding? info)) (write-readably o file env) #t)
+ ((not (eq? (visiting info) #:defined)) #f) ;forward reference
+ (else (display (binding info) file) #t))))))
+
+;;; write-component OBJECT PATCHER FILE ENV
+;;;
+(define-macro (write-component object patcher file env)
+ `(or (write-component-procedure ,object ,file ,env)
+ (begin
+ (display #f ,file)
+ (add-patcher! ,patcher ,env))))
+
;;;
;;; Strings
;;;
(pop-ref! env)
(set! (objects env) (cons o (objects env)))))))
-(define (write-component-procedure o file env)
- "Return #f if circular reference"
- (cond ((immediate? o) (write o file) #t)
- ((readable? o) (write (readable-expression o) file) #t)
- ((excluded? o env) (display #f file) #t)
- (else
- (let ((info (object-info o env)))
- (cond ((not (binding? info)) (write-readably o file env) #t)
- ((not (eq? (visiting info) #:defined)) #f) ;forward reference
- (else (display (binding info) file) #t))))))
-
-;;; write-component OBJECT PATCHER FILE ENV
-;;;
-(define-macro (write-component object patcher file env)
- `(or (write-component-procedure ,object ,file ,env)
- (begin
- (display #f ,file)
- (add-patcher! ,patcher ,env))))
;;;
;;; Main engine