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keeping track of history in repl

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Alex Shinn 2010-09-12 06:53:41 +00:00
parent 37f8c6c8b9
commit bfb698fd1b
2 changed files with 25 additions and 19 deletions
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3
lib/chibi/repl.module
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@ -5,5 +5,6 @@
(import (chibi ast) (import (chibi ast)
(chibi process) (chibi process)
(chibi term edit-line) (chibi term edit-line)
(srfi 18)) (srfi 18)
(srfi 38))
(include "repl.scm")) (include "repl.scm"))

41
lib/chibi/repl.scm
View file

@ -18,24 +18,29 @@
thunk thunk
(lambda () (set-signal-action! sig old-handler))))) (lambda () (set-signal-action! sig old-handler)))))
(define (run-repl module env) (define (run-repl module env . o)
(let ((line (edit-line (if module (string-append (symbol->string module) "> ") "> ")))) (let ((history (make-history)))
(cond (let lp ((module module) (env env))
((or (not line) (eof-object? line))) (let ((line (edit-line (if module (string-append (symbol->string module) "> ") "> ")
((equal? line "") (run-repl module env)) 'history: history)))
(else (cond
(handle-exceptions exn (print-exception exn (current-error-port)) ((or (not line) (eof-object? line)))
(let* ((expr (call-with-input-string line read)) ((equal? line "") (lp module env))
(thread (make-thread (lambda () (else
(let ((res (eval expr env))) (history-commit! history line)
(if (not (eq? res (if #f #f))) (handle-exceptions
(write res))))))) exn (print-exception exn (current-error-port))
(with-signal-handler (let* ((expr (call-with-input-string line read/ss))
signal/interrupt (thread (make-thread (lambda ()
(lambda (n) (thread-terminate! thread)) (let ((res (eval expr env)))
(lambda () (thread-start! thread) (thread-join! thread))))) (if (not (eq? res (if #f #f)))
(newline) (write/ss res))
(run-repl module env))))) (newline))))))
(with-signal-handler
signal/interrupt
(lambda (n) (thread-terminate! thread))
(lambda () (thread-start! thread) (thread-join! thread)))))
(lp module env)))))))
(define (repl) (define (repl)
(run-repl #f (interaction-environment))) (run-repl #f (interaction-environment)))