stk/Lib/bigloo.stk

;;;;
;;;; b i g l o o . s t k			-- Bigloo compatibility file
;;;;
;;;; Copyright <20> 1997-1999 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
;;;; 
;;;; Permission to use, copy, modify, distribute,and license this
;;;; software and its documentation for any purpose is hereby granted,
;;;; provided that existing copyright notices are retained in all
;;;; copies and that this notice is included verbatim in any
;;;; distributions.  No written agreement, license, or royalty fee is
;;;; required for any of the authorized uses.
;;;; This software is provided ``AS IS'' without express or implied
;;;; warranty.
;;;;
;;;;           Author: Erick Gallesio [eg@unice.fr]
;;;;    Creation date: 28-Oct-1997 11:09
;;;; Last file update:  3-Sep-1999 19:49 (eg)


;;;
;;; define-inline 
;;;

#|
(define-macro (define-inline args . body)
  `(define-macro ,args
     (list (lambda ,(copy-tree (cdr args)) ,@body) ,@(cdr args))))

  This definition works but is not more efficient than not inlining the function
  (since it calls in fact an internal lambda)
|#

(define define-inline define)


;;;
;;; labels
;;;

(define-macro (labels bindings . body)
  (define (expand binding)
    (when (< (length binding) 3)
      (error "labels: bad binding ~S" binding))
    `(,(car binding) (lambda ,(cadr binding) ,@(cddr binding))))

  `(letrec ,(map expand bindings)
     ,@body))

;;;
;;; A macro for parsing the Bigloo MODULE directive
;;; This macro has been written for the MATCH-CASE and MATCH-LAMBDA
;;; primitives.
;;; Alas, the problem is that we don't have match-case here :-)
;;;

(define-macro (module name . clauses)
  (define (import-directive x)
    `(import ,@(map (lambda (x) (if (pair? x) (car x) x)) x)))

  (define (export-directive x)
    `(export ,@(map (lambda (x) 
		      (if (pair? x) 
			  ( (if (eq? (car x) 'inline) cadr car)  x)
			  x)) 
		    x)))

  `(begin 
     (define-module ,name
       ,@(map (lambda (clause)
		(case (car clause)
		  ((export) (export-directive (cdr clause)))
		  ((import) (import-directive (cdr clause)))
		  ((use)    '())
		  (else     (error "module" "Unknown clause" (cons name clause)))))
	      clauses)
       (define error bigloo:error))
     (select-module ,name)))

;;;
;;; Error
;;;
(define (bigloo:error proc msg obj)
  (error "~A: ~A ~S" proc msg obj))

(define-module __error)


(provide "bigloo")