Re: Exceptions from C code / handling them in scheme

[Martin Grabmueller]

> From: Richard Guenther <address@hidden>
> Date: Sun, 1 Apr 2001 18:37:48 +0200 (CEST)
> 
> What is the recommended way to "fail" in C code called from
> scheme? I.e. is there something like an exception that can
> be thrown and catchen in scheme code? I see there is f.i.
> SCM_ASSERT - how can I manually "throw" such an exception and
> how can I catch this in scheme code? A simple example would
> be helpful.

I am using code like the following for signalling errors:

      if (!SCM_CHARP (ch))
        SCM_MISC_ERROR ("procedure ~S returned non-char", SCM_LIST1 (proc));

But this might require a very recent CVS version of Guile, I haven't
checked for older versions.  Have a look at `error.h' from the Guile
distribution to see which functions for error signalling are provided.

Regards,
  'martin