* Can't get outside bindings in the string expression with eval-string
@ 2011-10-18 14:32 Nala Ginrut
2011-10-18 14:42 ` Nala Ginrut
2011-10-18 14:59 ` Andy Wingo
0 siblings, 2 replies; 4+ messages in thread
From: Nala Ginrut @ 2011-10-18 14:32 UTC (permalink / raw)
To: guile-devel
[-- Attachment #1: Type: text/plain, Size: 882 bytes --]
hi guys, I want to get a variable bidden from outside environment, such as
the code below:
-----------------------correct code------------------------
(define fp (open-output-file "/tmp/aaa"))
(eval-string "(write 123 fp)" (current-module))
-------------------------end----------------------------------
This code can run successfully.
But I want to use this trick in a procedure:
-----------------------wrong code------------------------------
(define (func)
(let ((fp (open-output-file "/tmp/aaa")))
(eval-string "(write 123 fp)" (current-module))
))
-----------------------end code------------------------------------
Guile will throw :
========================================
scheme@(guile-user)> (func)
ERROR: In procedure memoize-variable-access!:
ERROR: Unbound variable: fp0
========================================
Is this a bug? Or I missed something?
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Can't get outside bindings in the string expression with eval-string 2011-10-18 14:32 Can't get outside bindings in the string expression with eval-string Nala Ginrut @ 2011-10-18 14:42 ` Nala Ginrut 2011-10-18 14:59 ` Andy Wingo 1 sibling, 0 replies; 4+ messages in thread From: Nala Ginrut @ 2011-10-18 14:42 UTC (permalink / raw) To: guile-devel [-- Attachment #1: Type: text/plain, Size: 37 bytes --] sorry for the typo: s/bidden/bound/g [-- Attachment #2: Type: text/html, Size: 47 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Can't get outside bindings in the string expression with eval-string 2011-10-18 14:32 Can't get outside bindings in the string expression with eval-string Nala Ginrut 2011-10-18 14:42 ` Nala Ginrut @ 2011-10-18 14:59 ` Andy Wingo [not found] ` <CAPjoZoeUQ7aokEUzeQ1f+Ge1zPOkEQcLgwdTiC5YJtDRR2hrqg@mail.gmail.com> 1 sibling, 1 reply; 4+ messages in thread From: Andy Wingo @ 2011-10-18 14:59 UTC (permalink / raw) To: Nala Ginrut; +Cc: guile-devel On Tue 18 Oct 2011 16:32, Nala Ginrut <nalaginrut@gmail.com> writes: > -----------------------wrong code------------------------------ > (define (func) > (let ((fp (open-output-file "/tmp/aaa"))) > (eval-string "(write 123 fp)" (current-module)) > )) > -----------------------end code------------------------------------ `fp' is a lexical binding, not a module-level binding. So no, this won't work. You won't be able to get to lexical variables via `eval' (or `eval-string'). Andy -- http://wingolog.org/ ^ permalink raw reply [flat|nested] 4+ messages in thread
[parent not found: <CAPjoZoeUQ7aokEUzeQ1f+Ge1zPOkEQcLgwdTiC5YJtDRR2hrqg@mail.gmail.com>]
* Re: Can't get outside bindings in the string expression with eval-string [not found] ` <CAPjoZoeUQ7aokEUzeQ1f+Ge1zPOkEQcLgwdTiC5YJtDRR2hrqg@mail.gmail.com> @ 2011-10-19 2:22 ` Nala Ginrut 0 siblings, 0 replies; 4+ messages in thread From: Nala Ginrut @ 2011-10-19 2:22 UTC (permalink / raw) To: guile-devel [-- Attachment #1: Type: text/plain, Size: 660 bytes --] On Tue, Oct 18, 2011 at 10:59 PM, Andy Wingo <wingo@pobox.com> wrote: > On Tue 18 Oct 2011 16:32, Nala Ginrut <nalaginrut@gmail.com> writes: > > > -----------------------wrong code------------------------------ > > (define (func) > > (let ((fp (open-output-file "/tmp/aaa"))) > > (eval-string "(write 123 fp)" (current-module)) > > )) > > -----------------------end code------------------------------------ > > `fp' is a lexical binding, not a module-level binding. So no, this > won't work. You won't be able to get to lexical variables via `eval' > (or `eval-string'). > > Andy > -- > http://wingolog.org/ > OK, I'll try another approach. [-- Attachment #2: Type: text/html, Size: 1269 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-10-19 2:22 UTC | newest]
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2011-10-18 14:32 Can't get outside bindings in the string expression with eval-string Nala Ginrut
2011-10-18 14:42 ` Nala Ginrut
2011-10-18 14:59 ` Andy Wingo
[not found] ` <CAPjoZoeUQ7aokEUzeQ1f+Ge1zPOkEQcLgwdTiC5YJtDRR2hrqg@mail.gmail.com>
2011-10-19 2:22 ` Nala Ginrut
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