39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
;;;; srfi-7.stk -- SRFI-7 (PROGRAM)
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;;;;
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;;;; Copyright © 1999 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
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;;;;
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;;;; Permission to use, copy, modify, distribute,and license this
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;;;; software and its documentation for any purpose is hereby granted,
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;;;; provided that existing copyright notices are retained in all
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;;;; copies and that this notice is included verbatim in any
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;;;; distributions. No written agreement, license, or royalty fee is
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;;;; required for any of the authorized uses.
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;;;; This software is provided ``AS IS'' without express or implied
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;;;; warranty.
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;;;;
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;;;; This is an implementation of SRFI-7 (Richard Kelsey). This implementation
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;;;; corresponds to the second implementation given in the reference document.
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;;;;
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;;;; Author: Erick Gallesio [eg@unice.fr]
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;;;; Creation date: 31-Aug-1999 16:10 (eg)
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;;;; Last file update: 3-Sep-1999 19:54 (eg)
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(require "defsyntax")
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(define-syntax program
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(syntax-rules (requires files code feature-cond)
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((program)
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(begin))
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((program (requires feature-id ...) more ...)
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(begin (cond-expand ((and feature-id ...) 'okay)) (program more ...)))
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((program (files filename ...) more ...)
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(begin (load filename) ... (program more ...)))
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((program (code stuff ...) more ...)
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(begin stuff ... (program more ...)))
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((program (feature-cond (requirement stuff ...) ...) more ...)
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(begin (cond-expand (requirement (program stuff ...)) ...)
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(program more ...)))))
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(provide "srfi-7")
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