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-rw-r--r--repl.scm81
1 files changed, 41 insertions, 40 deletions
diff --git a/repl.scm b/repl.scm
index c647ec2..b7fff38 100644
--- a/repl.scm
+++ b/repl.scm
@@ -1,5 +1,5 @@
; "repl.scm", read-eval-print-loop for Scheme
-; Copyright (c) 1993, Aubrey Jaffer
+; Copyright (c) 1993, 2003 Aubrey Jaffer
;
;Permission to copy this software, to modify it, to redistribute it,
;to distribute modified versions, and to use it for any purpose is
@@ -8,7 +8,7 @@
;1. Any copy made of this software must include this copyright notice
;in full.
;
-;2. I have made no warrantee or representation that the operation of
+;2. I have made no warranty or representation that the operation of
;this software will be error-free, and I am under no obligation to
;provide any services, by way of maintenance, update, or otherwise.
;
@@ -17,9 +17,13 @@
;promotional, or sales literature without prior written consent in
;each case.
+(require 'values)
(require 'dynamic-wind)
+(require-if 'compiling 'qp)
+(require-if 'compiling 'debug)
+;@
(define (repl:quit) (slib:error "not in repl:repl"))
-
+;@
(define (repl:top-level repl:eval)
(repl:repl (lambda () (display "> ")
(force-output (current-output-port))
@@ -49,44 +53,41 @@
(repl:eval o))
(set! *load-pathname* old-load-pathname))))))
(repl:restart #f)
- (values? (provided? 'values))
(has-char-ready? (provided? 'char-ready?))
(repl:error (lambda args (require 'debug) (apply qpn args)
(repl:restart #f))))
(dynamic-wind
- (lambda ()
- (set! load repl:load)
- (set! slib:eval repl:eval)
- (set! slib:error repl:error)
- (set! repl:quit
- (lambda () (let ((cont repl:restart))
- (set! repl:restart #f)
- (cont #t)))))
- (lambda ()
- (do () ((call-with-current-continuation
- (lambda (cont)
- (set! repl:restart cont)
- (do ((obj (repl:read) (repl:read)))
- ((eof-object? obj) (repl:quit))
- (cond
- (has-char-ready?
- (let loop ()
- (cond ((char-ready?)
- (let ((c (peek-char)))
- (cond
- ((eof-object? c))
- ((char=? #\newline c) (read-char))
- ((char-whitespace? c)
- (read-char) (loop))
- (else (newline)))))))))
- (if values?
- (call-with-values (lambda () (repl:eval obj))
- repl:print)
- (repl:print (repl:eval obj)))))))))
- (lambda () (cond (repl:restart
- (display ">>ERROR<<") (newline)
- (repl:restart #f)))
- (set! load old-load)
- (set! slib:eval old-eval)
- (set! slib:error old-error)
- (set! repl:quit old-quit)))))
+ (lambda ()
+ (set! load repl:load)
+ (set! slib:eval repl:eval)
+ (set! slib:error repl:error)
+ (set! repl:quit
+ (lambda () (let ((cont repl:restart))
+ (set! repl:restart #f)
+ (cont #t)))))
+ (lambda ()
+ (do () ((call-with-current-continuation
+ (lambda (cont)
+ (set! repl:restart cont)
+ (do ((obj (repl:read) (repl:read)))
+ ((eof-object? obj) (repl:quit))
+ (cond
+ (has-char-ready?
+ (let loop ()
+ (cond ((char-ready?)
+ (let ((c (peek-char)))
+ (cond
+ ((eof-object? c))
+ ((char=? #\newline c) (read-char))
+ ((char-whitespace? c)
+ (read-char) (loop))
+ (else (newline)))))))))
+ (call-with-values (lambda () (repl:eval obj))
+ repl:print)))))))
+ (lambda () (cond (repl:restart
+ (display ">>ERROR<<") (newline)
+ (repl:restart #f)))
+ (set! load old-load)
+ (set! slib:eval old-eval)
+ (set! slib:error old-error)
+ (set! repl:quit old-quit)))))