Sorry, I meant SIGNAL, not RAISE, in CL. I'm glad Guile supports `guard`. On Sat, Jul 11, 2020 at 6:39 PM Chris Vine <vine35792...@gmail.com> wrote:
> On Sat, 11 Jul 2020 14:20:22 -0400 > John Cowan <co...@ccil.org> wrote: > > On Sat, Jul 11, 2020 at 6:14 AM Chris Vine <vine35792...@gmail.com> > wrote: > > > > > (To answer the question in your > > > following email, continuable exceptions are in some sense analogous to > > > common lisp restarts.) > > > > Continuable and non-continuable in Scheme are exactly like CL raise and > > error (and its variants), except that the machinery is different. > Restarts > > are another matter, independent of the condition system (though often > > considered with it). I have a pre-SRFI for them at < > > https://github.com/johnwcowan/r7rs-work/blob/master/RestartsCowan.md>, > > similar to but simpler than the CL restart system, and using first-class > > restarts. It currently lacks restart-case. > > I am not an expert on CL so can you provide me with the hyperspec > reference to CL 'RAISE'? (I know about CL 'ERROR' and 'SIGNAL'.) > > [snip] > > > R6RS/R7RS's guard form is a wrapper for this which also > > > incorporates a cond form to enable different exception types to be > > > handled by different handlers. > > > > > > > Is the intention to provide `guard` in Guile 3.x? > > It's been in guile for as long as I can remember (at least since 2.0). > >
