56 lines
1.3 KiB
Scheme
56 lines
1.3 KiB
Scheme
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; Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees. See file COPYING.
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; run
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(define-command-syntax 'run "<exp>" "evaluate an expression" '(expression))
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(define (run exp)
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(evaluate-and-select exp (environment-for-commands)))
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; exit
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(define-command-syntax 'exit "[<status>]" "leave Scheme" '(&opt expression))
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(define (exit . exp-option)
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(let ((status (if (null? exp-option)
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0
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(evaluate (car exp-option) (environment-for-commands)))))
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(exit-command-processor (lambda () status))))
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; go
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(define-command-syntax 'go "<exp>" "leave Scheme via tail recursion"
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'(expression))
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(define (go exp)
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(let ((env (environment-for-commands)))
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(exit-command-processor (lambda () (evaluate exp env)))))
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; load
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(define-command-syntax 'load "<filename> ..."
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"load Scheme source file(s)"
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'(&rest filename))
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(define (load . filenames)
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(let ((env (environment-for-commands)))
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;; (with-interaction-environment env
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;; (lambda ()
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(noting-undefined-variables env
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(lambda ()
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(for-each (lambda (filename)
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(load-into filename env))
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filenames)))));; ))
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; help
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(define ? help)
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(define-command-syntax 'help
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"[<command-name>]"
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"list all commands, or give help on a specific command"
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'(&opt name))
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(define-command-syntax '? "[<command-name>]" "same as ,help" '(&opt name))
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