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-rw-r--r--module/system/base/syntax.scm12
1 files changed, 9 insertions, 3 deletions
diff --git a/module/system/base/syntax.scm b/module/system/base/syntax.scm
index 8b0ba5969..0e02ba06a 100644
--- a/module/system/base/syntax.scm
+++ b/module/system/base/syntax.scm
@@ -29,7 +29,12 @@
;;;
(define-macro (define-type name . rest)
- `(begin ,@(map (lambda (def) `(define-record ,def)) rest)))
+ (let ((name (if (pair? name) (car name) name))
+ (opts (if (pair? name) (cdr name) '())))
+ (let ((printer (kw-arg-ref opts #:printer)))
+ `(begin ,@(map (lambda (def) `(define-record ,def
+ ,@(if printer (list printer) '())))
+ rest)))))
;;;
@@ -39,13 +44,14 @@
(define (symbol-trim-both sym pred)
(string->symbol (string-trim-both (symbol->string sym) pred)))
-(define-macro (define-record def)
+(define-macro (define-record def . printer)
(let* ((name (car def)) (slots (cdr def))
(slot-names (map (lambda (slot) (if (pair? slot) (car slot) slot))
slots))
(stem (symbol-trim-both name (list->char-set '(#\< #\>)))))
`(begin
- (define ,name (make-record-type ,(symbol->string name) ',slot-names))
+ (define ,name (make-record-type ,(symbol->string name) ',slot-names
+ ,@printer))
(define ,(symbol-append 'make- stem)
(let ((slots (list ,@(map (lambda (slot)
(if (pair? slot)