(define meta-command-token (cons 'meta 'command))
-(define (meta-reader read)
+(define (meta-reader read env)
(lambda read-args
- (with-input-from-port
- (if (pair? read-args) (car read-args) (current-input-port))
- (lambda ()
- (let ((ch (next-char #t)))
- (cond ((eof-object? ch)
- ;; apparently sometimes even if this is eof, read will
- ;; wait on somethingorother. strange.
- ch)
- ((eqv? ch #\,)
- (read-char)
- meta-command-token)
- (else (read))))))))
+ (let ((port (if (pair? read-args) (car read-args) (current-input-port))))
+ (with-input-from-port port
+ (lambda ()
+ (let ((ch (next-char #t)))
+ (cond ((eof-object? ch)
+ ;; apparently sometimes even if this is eof, read will
+ ;; wait on somethingorother. strange.
+ ch)
+ ((eqv? ch #\,)
+ (read-char port)
+ meta-command-token)
+ (else (read port env)))))))))
;; repl-reader is a function defined in boot-9.scm, and is replaced by
;; something else if readline has been activated. much of this hoopla is
;; to be able to re-use the existing readline machinery.
(define (prompting-meta-read repl)
- (let ((prompt (lambda () (repl-prompt repl)))
- (lread (language-reader (repl-language repl))))
- (with-fluid* current-reader (meta-reader lread)
- (lambda () (repl-reader (lambda () (repl-prompt repl)))))))
+ (repl-reader (lambda () (repl-prompt repl))
+ (meta-reader (language-reader (repl-language repl))
+ (current-module))))
(define (default-catch-handler . args)
(pmatch args
(newline)
(set! status '()))
(else
+ ;; since the input port is line-buffered, consume up to the
+ ;; newline
+ (flush-to-newline)
(with-backtrace
(catch 'quit
(lambda ()
((char-whitespace? ch) (read-char) (next-char wait))
(else ch)))
#f))
+
+(define (flush-to-newline)
+ (if (char-ready?)
+ (let ((ch (peek-char)))
+ (if (and (not (eof-object? ch)) (char-whitespace? ch))
+ (begin
+ (read-char)
+ (if (not (char=? ch #\newline))
+ (flush-to-newline)))))))
+
+
\ No newline at end of file