[NTG-context] What do \start and \stop mean?
I found \start and \stop referenced in the context reference manual (e.g. section 5.5). While \startXYZ - \stopXYZ pairs are discussed earlier, I can't find any place that \start and \stop (with no suffix) are described. They seem to be used like \bgroup and \egroup. Is that right? They are defined in core-sys.mkiv, but I can't figure out from there what they actually do. I'll contribute documentation for them if someone can tell me what they mean. Thanks, Lars ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] What do \start and \stop mean?
On Mon, 30 Sep 2013, Lars Huttar wrote: I found \start and \stop referenced in the context reference manual (e.g. section 5.5). While \startXYZ - \stopXYZ pairs are discussed earlier, I can't find any place that \start and \stop (with no suffix) are described. They seem to be used like \bgroup and \egroup. Is that right? They are defined in core-sys.mkiv, but I can't figure out from there what they actually do. (Untested, based on what I remember): \start = \bgroup \stop = \egroup but \start scans the next argument, so there are situations when \start may fail but \bgroup works. \start[whatever] ... \stop = \startwhatever ... \stopwhatever Aditya ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] What do \start and \stop mean?
On Mon, Sep 30, 2013 at 5:38 PM, Lars Huttar lars_hut...@sil.org wrote: I found \start and \stop referenced in the context reference manual (e.g. section 5.5). While \startXYZ - \stopXYZ pairs are discussed earlier, I can't find any place that \start and \stop (with no suffix) are described. They seem to be used like \bgroup and \egroup. Is that right? They are defined in core-sys.mkiv, but I can't figure out from there what they actually do. I'll contribute documentation for them if someone can tell me what they mean. Thanks, Lars core-sys.mkiv : \unexpanded\def\start {\dosingleempty\syst_start} \def\syst_start {\bgroup \iffirstargument \expandafter\syst_start_yes \else \expandafter\syst_start_nop \fi} \def\syst_start_yes[#1]% {\edef\m_syst_start_stop{#1}% \ifx\m_syst_start_stop\empty \let\syst_stop_indeed\donothing \else\ifcsname\e!start\m_syst_start_stop\endcsname \expandafter\let\expandafter\syst_stop_indeed\csname\e!stop\m_syst_start_stop\endcsname \csname\e!start\m_syst_start_stop\expandafter\expandafter\expandafter\endcsname \else \let\syst_stop_indeed\donothing \fi\fi} \def\syst_start_nop[#1]% {\let\syst_stop_indeed\donothing} \unexpanded\def\stop {\syst_stop_indeed \egroup} (it should be \let\donothing\empty) -- luigi ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] What do \start and \stop mean?
On Mon, Sep 30, 2013 at 6:00 PM, luigi scarso luigi.sca...@gmail.comwrote: On Mon, Sep 30, 2013 at 5:38 PM, Lars Huttar lars_hut...@sil.org wrote: I found \start and \stop referenced in the context reference manual (e.g. section 5.5). While \startXYZ - \stopXYZ pairs are discussed earlier, I can't find any place that \start and \stop (with no suffix) are described. They seem to be used like \bgroup and \egroup. Is that right? They are defined in core-sys.mkiv, but I can't figure out from there what they actually do. I'll contribute documentation for them if someone can tell me what they mean. Thanks, Lars core-sys.mkiv : \unexpanded\def\start {\dosingleempty\syst_start} \def\syst_start {\bgroup \iffirstargument \expandafter\syst_start_yes \else \expandafter\syst_start_nop \fi} \def\syst_start_yes[#1]% {\edef\m_syst_start_stop{#1}% \ifx\m_syst_start_stop\empty \let\syst_stop_indeed\donothing \else\ifcsname\e!start\m_syst_start_stop\endcsname \expandafter\let\expandafter\syst_stop_indeed\csname\e!stop\m_syst_start_stop\endcsname \csname\e!start\m_syst_start_stop\expandafter\expandafter\expandafter\endcsname \else \let\syst_stop_indeed\donothing \fi\fi} \def\syst_start_nop[#1]% {\let\syst_stop_indeed\donothing} \unexpanded\def\stop {\syst_stop_indeed \egroup} (it should be \let\donothing\empty) sorry, hit return too early. \start ... \stop without argument is \bgroup % from\def\syst_start \expandafter\syst_start_nop \syst_start_nop is {\let\syst_stop_indeed\donothing} and \stop is hence \syst_stop_indeed \egroup i.e. \donothing \egroup are like \bgroup ... \egroup It seems that there are no examples of \start[]..\stop . -- luigi ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___