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Justin Ethier 2016-10-24 07:39:12 +00:00
parent 1451bf7f8e
commit 0feb1b1054
1 changed files with 36 additions and 0 deletions
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36
scheme/base.sld
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@ -316,6 +316,42 @@
(er-macro-transformer
;; Based on the cond-expand macro from Chibi scheme
(lambda (expr rename compare)
;; TODO: port to this macro, so we can use below for library form
;(define (library-exists? import . ext)
; (file-exists?
; (lib:import->filename
; (lib:import->library-name import)
; (if (null? ext) ".sld" (car ext)))))
;(define (lib:import->filename import . ext)
; (let* ((file-ext
; (if (null? ext)
; ".sld"
; (car ext)))
; (filename*
; (string-append
; (apply
; string-append
; (map
; (lambda (i)
; (string-append "/" (lib:atom->string i)))
; import))
; file-ext))
; (filename
; (substring filename* 1 (string-length filename*))))
; (if (or (tagged-list? 'scheme import)
; (tagged-list? 'srfi import))
; (string-append (Cyc-installation-dir 'sld) "/" filename) ;; Built-in library
; filename)))
;(define (lib:import->library-name import)
; (cond
; ((or (tagged-list? 'only import)
; (tagged-list? 'except import)
; (tagged-list? 'prefix import)
; (tagged-list? 'rename import))
; (lib:import->library-name
; (cadr import)))
; (else
; import)))
(define (check x)
(if (pair? x)
(case (car x)