68 lines
2.1 KiB
Scheme
68 lines
2.1 KiB
Scheme
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; Copyright (c) 1993-1999 by Richard Kelsey and Jonathan Rees. See file COPYING.
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(define (start structs-to-open)
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(lambda (structs-thunk)
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(usual-resumer
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(lambda (arg)
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(let* ((structs (structs-thunk))
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(b (make-built-in-structures structs)))
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(initialize-interaction-environment! b)
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(with-interaction-environment
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(make-initial-package b structs-to-open)
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(lambda ()
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(command-processor (cond ((assq 'usual-commands structs)
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=> (lambda (z)
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(structure-package (cdr z))))
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(else #f))
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arg))))))))
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; The structs argument is an a-list of (name . structure), as computed
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; by the expression returned by reify-structures.
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(define (make-built-in-structures structs)
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(let* ((p (make-simple-package '() #f #f 'built-in-structures))
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(s (make-structure p
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(lambda ()
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(make-simple-interface
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#f ;name
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(cons 'built-in-structures (map car structs))))
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'built-in-structures)))
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(for-each (lambda (name+struct)
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(environment-define! p
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(car name+struct)
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(cdr name+struct)))
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structs)
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(environment-define! p 'built-in-structures s)
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s))
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(define (initialize-interaction-environment! built-in-structures)
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(let ((scheme (*structure-ref built-in-structures 'scheme))
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(tower (make-tower built-in-structures 'interaction)))
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(set-interaction-environment!
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(make-simple-package (list scheme) #t tower 'interaction))
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(set-scheme-report-environment!
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5
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(make-simple-package (list scheme) #t tower 'r5rs))))
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; Intended for bootstrapping the command processor.
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(define (make-initial-package built-in-structures structs-to-open)
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(let ((p (make-simple-package
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(cons built-in-structures
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(map (lambda (name)
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(*structure-ref built-in-structures name))
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structs-to-open))
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eval
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(make-tower built-in-structures 'initial)
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'initial)))
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(environment-define! p 'built-in-structures built-in-structures)
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p))
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(define (make-tower built-in-structures id)
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(make-reflective-tower eval
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(list (*structure-ref built-in-structures
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'scheme))
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id))
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