Creating New Scope

Creating New Scope

[Volkan YAZICI]

Hi all,

This may look a little bit similar to my previous question but, I
couldn't figure out a solution and thought it'd be best to hear your
opinions about the problem: How can I create a new [for instance (let
...)] scope within my C code? By using such a method, after the
execution of the scope, I'll be sure that any definitions special to the
scope will get freed. I hope, I managed to explain my question.


Regards.


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Re: Creating New Scope

[Neil Jerram]

Volkan YAZICI <yazicivo@ttnet.net.tr> writes:

> Hi all,
>
> This may look a little bit similar to my previous question but, I
> couldn't figure out a solution and thought it'd be best to hear your
> opinions about the problem: How can I create a new [for instance (let
> ...)] scope within my C code? By using such a method, after the
> execution of the scope, I'll be sure that any definitions special to the
> scope will get freed. I hope, I managed to explain my question.

I'm not sure what you mean by a new scope in C code.  C code must
always obey C's rules, of course.

Perhaps you mean that the C code has some Scheme code that it wants to
eval, but that it doesn't want it to make any lasting bindings.

Then I guess you could do something like

  scm_eval_string (scm_string_append (scm_list_3
     (scm_from_locale_string ("(let () "),
      scm_from_locale_string (code_to_eval),
      scm_from_locale_string (")"))));

Does that help at all?

Regards,
     Neil



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Re: Creating New Scope

[Volkan YAZICI]

On Oct 31 09:43, Neil Jerram wrote:
> I'm not sure what you mean by a new scope in C code.  C code must
> always obey C's rules, of course.
> 
> Perhaps you mean that the C code has some Scheme code that it wants to
> eval, but that it doesn't want it to make any lasting bindings.
> 
> Then I guess you could do something like
> 
>   scm_eval_string (scm_string_append (scm_list_3
>      (scm_from_locale_string ("(let () "),
>       scm_from_locale_string (code_to_eval),
>       scm_from_locale_string (")"))));

Yeah, this is exactly what I want to do but the problem is, after "(let
" I've some SCM values that I want to define in the inner scope. And the
problem is I don't have an idea about how can I turn them into suitable
string forms to place in the above scm_from_locale_string(...) string.


Regards.


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