On Fri, Nov 05, 2010 at 03:22:06PM +0200, Khaled Hosny wrote: > On Fri, Nov 05, 2010 at 01:59:54PM +0100, Manuel Pégourié-Gonnard wrote: > > Hi, > > > > Sorry if this is very clear from the manual, maybe I just didn't read the > > part > > where it is explained (or I read it but was too stupid/tired to notice), > > but I > > don't understand the meaning of the return value of some callbacks. > > > > The first example (by order of apparition in the manual) is > > pre_linebreak_filter, whose calling convention is: > > > > function(<node> head, <string> groupcode) > > return true | false | <node> newhead > > end > > > > I think it's clear what returning a newhead node does, but I don't > > understand > > what returning true or false means for this callback. Other similar > > callbacks > > include post_linebreak_filter, (h|v)pack_filter, pre_output_filter, etc. > > I think it is explained in section 4.1: > > For some minor speed gain, you can assign the boolean false to the > non-file related callbacks, doing so will prevent LuaTeX from executing > whatever it would execute by default (when no callback function is > registered at all). Be warned: this may cause all sorts of grief unless > you know exactly what you are doing! This functionality is present since > version 0.38. > > Not sure about "true" though.
Please ignore this, I just confused things up. Regards, Khaled -- Khaled Hosny Arabic localiser and member of Arabeyes.org team Free font developer _______________________________________________ dev-luatex mailing list dev-luatex@ntg.nl http://www.ntg.nl/mailman/listinfo/dev-luatex
