* Multi-language scripts
@ 2020-08-21 18:22 Stephen Scheck
2020-08-21 18:36 ` Matt Wette
0 siblings, 1 reply; 6+ messages in thread
From: Stephen Scheck @ 2020-08-21 18:22 UTC (permalink / raw)
To: guile-user
I'm trying to invoke `guile -s script` where script contains something like
this:
,language ecmascript
display("Hello JavaScript!\n");
,language scheme
(display "Hello Guile!\n")
However, REPL meta-commands do not seem to be available when passing a
script file to Guile with the -s switch.
Does anybody know if there's any way to make it work?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Multi-language scripts
2020-08-21 18:22 Stephen Scheck
@ 2020-08-21 18:36 ` Matt Wette
0 siblings, 0 replies; 6+ messages in thread
From: Matt Wette @ 2020-08-21 18:36 UTC (permalink / raw)
To: guile-user
On 8/21/20 11:22 AM, Stephen Scheck wrote:
> I'm trying to invoke `guile -s script` where script contains something like
> this:
>
> ,language ecmascript
> display("Hello JavaScript!\n");
> ,language scheme
> (display "Hello Guile!\n")
>
> However, REPL meta-commands do not seem to be available when passing a
> script file to Guile with the -s switch.
>
> Does anybody know if there's any way to make it work?
Did you try `guile --language=emacscript'?
mwette$ cat zz.js
display("hello\n");
mwette$ guile --language=ecmascript zz.js
hello
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Multi-language scripts
@ 2020-08-21 19:17 Stephen Scheck
2020-08-22 2:47 ` Matt Wette
0 siblings, 1 reply; 6+ messages in thread
From: Stephen Scheck @ 2020-08-21 19:17 UTC (permalink / raw)
To: matt.wette; +Cc: guile-user
Matt Wette wrote:
> Did you try `guile --language=emacscript’?
>
> mwette$ cat zz.js
> display("hello\n”);
>
> mwette$ guile --language=ecmascript zz.js
> hello
The intent is that I want it to change language in the middle of the script.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Multi-language scripts
2020-08-21 19:17 Multi-language scripts Stephen Scheck
@ 2020-08-22 2:47 ` Matt Wette
0 siblings, 0 replies; 6+ messages in thread
From: Matt Wette @ 2020-08-22 2:47 UTC (permalink / raw)
To: guile-user
On 8/21/20 12:17 PM, Stephen Scheck wrote:
> Matt Wette wrote:
>
>> Did you try `guile --language=emacscript’?
>>
>> mwette$ cat zz.js
>> display("hello\n”);
>>
>> mwette$ guile --language=ecmascript zz.js
>> hello
> The intent is that I want it to change language in the middle of the script.
>
>
maybe this?
(use-modules (system base language))
(current-language (lookup-language 'ecmascript))
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Multi-language scripts
@ 2020-08-22 14:53 Stephen Scheck
2020-08-22 15:22 ` Matt Wette
0 siblings, 1 reply; 6+ messages in thread
From: Stephen Scheck @ 2020-08-22 14:53 UTC (permalink / raw)
To: matt.wette; +Cc: guile-user
Matt Wette wrote:
> maybe this?
>
> (use-modules (system base language))
> (current-language (lookup-language 'ecmascript))
It doesn’t work:
scheme@(guile-user)> (use-modules (system base language))
scheme@(guile-user)> (lookup-language ‘ecmascript)
$1 = #<<language> name: ecmascript title: ECMAScript reader: #<procedure 7f939b1bb558 at language/ecmascript/spec.scm:33:16 (port env)> printer: #<procedure write (_ #:optional _)> parser: #f compilers: ((tree-il . #<procedure compile-tree-il (exp env opts)>)) decompilers: () evaluator: #f joiner: #f for-humans?: #t make-default-environment: #<procedure make-fresh-user-module ()>>
scheme@(guile-user)> (current-language $1)
$2 = scheme
scheme@(guile-user)> display("We should be in JavaScript now, but we aren’t!\n”);
$3 = #<procedure display (_ #:optional _)>
ERROR: Wrong type to apply: "We should be in JavaScript now, but we aren’t!\n”
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
Also, even if it did, it would be problematic switching back - you’d need to do something along these lines in Scheme first:
(define (string_to_symbol sym) (string->symbol sym))
(define (lookup_language lang) (lookup-language lang))
(define (set_current_language lang) (set-current-language! lang)) ;; assuming set-current-language! actually existed…
This wouldn’t work, obviously, in the general case for other languages. I don’t really want to use JavaScript, I was just using it as an example.
I really just want some way to enable the REPL reader when you pass a script to Guile with the -s switch from the command line so you can embed `,language` meta-commands in the script file.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Multi-language scripts
2020-08-22 14:53 Stephen Scheck
@ 2020-08-22 15:22 ` Matt Wette
0 siblings, 0 replies; 6+ messages in thread
From: Matt Wette @ 2020-08-22 15:22 UTC (permalink / raw)
To: guile-user
On 8/22/20 7:53 AM, Stephen Scheck wrote:
> Matt Wette wrote:
>
>> maybe this?
>>
>> (use-modules (system base language))
>> (current-language (lookup-language 'ecmascript))
> It doesn’t work:
>
> scheme@(guile-user)> (use-modules (system base language))
> scheme@(guile-user)> (lookup-language ‘ecmascript)
> $1 = #<<language> name: ecmascript title: ECMAScript reader: #<procedure 7f939b1bb558 at language/ecmascript/spec.scm:33:16 (port env)> printer: #<procedure write (_ #:optional _)> parser: #f compilers: ((tree-il . #<procedure compile-tree-il (exp env opts)>)) decompilers: () evaluator: #f joiner: #f for-humans?: #t make-default-environment: #<procedure make-fresh-user-module ()>>
> scheme@(guile-user)> (current-language $1)
> $2 = scheme
> scheme@(guile-user)> display("We should be in JavaScript now, but we aren’t!\n”);
> $3 = #<procedure display (_ #:optional _)>
> ERROR: Wrong type to apply: "We should be in JavaScript now, but we aren’t!\n”
>
> Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
>
>
> Also, even if it did, it would be problematic switching back - you’d need to do something along these lines in Scheme first:
>
> (define (string_to_symbol sym) (string->symbol sym))
> (define (lookup_language lang) (lookup-language lang))
> (define (set_current_language lang) (set-current-language! lang)) ;; assuming set-current-language! actually existed…
>
> This wouldn’t work, obviously, in the general case for other languages. I don’t really want to use JavaScript, I was just using it as an example.
>
> I really just want some way to enable the REPL reader when you pass a script to Guile with the -s switch from the command line so you can embed `,language` meta-commands in the script file.
>
>
I think the issue is that while the repl processes one input (line) at a
time guile
handles files by compiling a file at a time. I think you'd have to
write code
to process files an input (line) at a time. Maybe this could be a
procedure that
takes the name of the file, generates a repl and feeds the repl from the
file
one line at a time.
(I have played with the compiler code a bit in writing guile-hosted
parser/interpreters
for javascript, matlab, tcl and others. Try web search for guile nyacc.)
Matt
^ permalink raw reply [flat|nested] 6+ messages in thread
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