Jeroen Demeyer on Fri, 30 Aug 2013 13:55:38 +0200

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pari_err(): callback function instead of longjmp()

Hello pari-dev,

We at Sage are currently revisiting the way we do PARI error handling. I remind you we are using PARI-2.5.4 (but I don't think that makes such an important difference for this discussion).

It would be much more useful for Sage to have a callback function called from pari_err() instead of a longjmp(). I am talking about the following code:

pari_err(int numerr, ...)
  if (s_ERR_CATCH.n)
      longjmp(*(trapped->penv), numerr);

What's your opinion on adding the possibility of a callback function instead? If you don't like it, we're probably going to do it anyway in the Sage "fork" of PARI :-)