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| author | jitwit <jrn@bluefarm.ca> | 2019-12-05 15:03:50 -0500 |
|---|---|---|
| committer | jitwit <jrn@bluefarm.ca> | 2019-12-05 15:03:50 -0500 |
| commit | 7bc8f62409b66bdb35b934c632d7fea12a53d636 (patch) | |
| tree | 255a283fa422136f9d7656570461530e9855c569 /scheme/chez/geiser/geiser.ss | |
| parent | 2d682c0ae4963bfc28966cdf9f4544412c846d11 (diff) | |
| download | geiser-chez-7bc8f62409b66bdb35b934c632d7fea12a53d636.tar.gz geiser-chez-7bc8f62409b66bdb35b934c632d7fea12a53d636.tar.bz2 | |
Capture stdout in ChezScheme's eval:geiser
Diffstat (limited to 'scheme/chez/geiser/geiser.ss')
| -rw-r--r-- | scheme/chez/geiser/geiser.ss | 60 |
1 files changed, 28 insertions, 32 deletions
diff --git a/scheme/chez/geiser/geiser.ss b/scheme/chez/geiser/geiser.ss index 38bc68f..70b6b67 100644 --- a/scheme/chez/geiser/geiser.ss +++ b/scheme/chez/geiser/geiser.ss @@ -47,38 +47,34 @@ (define (geiser:eval module form . rest) rest - (let* ((body (lambda () - (if module - (eval form (environment module)) - (eval form)))) - (gen-result (lambda (result-mid is-error?) - (if is-error? - `((result "") - (output . "") - (error . ,(list - (cons 'key - (with-output-to-string - (lambda () - (display-condition result-mid))))))) - `((result ,(with-output-to-string - (lambda () - (pretty-print result-mid)))) - (output . ""))))) - (result (call/cc - (lambda (k) - (with-exception-handler - (lambda (e) - (k (gen-result e #t))) - (lambda () - (call-with-values - (lambda () - (body)) - (lambda (x . y) - (if (null? y) - (k (gen-result x #f)) - (k (gen-result (cons x y) #f))))))))))) - (write result) - (newline))) + (let ((output-string (open-output-string))) + (write + (call/cc + (lambda (k) + (with-exception-handler + (lambda (e) + (k `((result "") + (output . ,(get-output-string output-string)) + (error (key . ,(with-output-to-string + (lambda () + (display-condition e)))))))) + (lambda () + (call-with-values + ;; evaluate form, allow for multiple return values, + ;; and capture output in output-string. + (lambda () + (parameterize ((current-output-port output-string)) + (if module + (eval form (environment module)) + (eval form)))) + (lambda result + `((result ,(with-output-to-string + (lambda () + (pretty-print + (if (null? (cdr result)) (car result) result))))) + (output . ,(get-output-string output-string)))))))))) + (newline) + (close-output-port output-string))) (define (geiser:module-completions prefix . rest) (define (substring? s1 s2) |