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; Part of Scheme 48 1.9. See file COPYING for notices and license.
; Authors: Richard Kelsey, Jonathan Rees, Mike Sperber
; This file has to be loaded into the initial-image before any use of
; DEFINE-STRUCTURE. Compare with alt/init-defpackage.scm.
; The procedure given to DEFINE-SYNTACTIC-TOWER-MAKER is called when
; a DEFINE-STRUCTURE form is evaluated.
(define-syntactic-tower-maker
(let ((comp-env-macro-eval
(*structure-ref compiler-envs 'comp-env-macro-eval))
(make-simple-interface
(*structure-ref interfaces 'make-simple-interface))
(env (interaction-environment)))
(lambda (clauses id)
(if (null? clauses)
;; (make-syntactic-tower eval (list scheme) id)
(comp-env-macro-eval (package->environment env))
(delay
(let ((package (eval `(a-package ,(if id
`(for-syntax ,id)
'(for-syntax))
,@clauses)
env)))
(ensure-loaded (make-structure package
(lambda ()
(make-simple-interface #f '()))
'for-syntax))
(cons eval package)))))))
(define-reader read)
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