Re: safe way of writing arguments

[Jano Kula <jano.kula@tiscali.cz>]

Hans Hagen wrote:
> Jano Kula wrote:
>> Hi!
>>
>> Is it safe to leave spare comma at the end of the key=value list or 
>> other list of arguments?
>>   
> in most cases it is ok
>> It is not nice, but when adding/commenting arguments in readable way 
>> (one per line) it's faster and while experimenting with parameters one 
>> doesn't have to care about the last comma adding or removing it back and 
>> forth, for example:
>>
>> \setuplayout[
>> grid=yes,
>> %header=0mm,
>> footer=7mm,
>> %footerdistance=10mm,
>> %cutspace=12mm,
>> ]
>>   
> in this case a space after 12mm is not that problematic because layout 
> are calculated in vertical mode and the 12 mm is used in assignments
>> or
>>
>> \setuphead[
>> chapter,
>> section,
>> %subsection,
>> %subsubsection,
>>   
> hm, here it can be troublesome unless i catch an empty case (not sure); 
> if you run into troubles with such cases report it to the list and we 
> can see if we can catch it
>> ][
>> textstyle=\ss,
>> numberstyle=\ss,
>> ]
>>   
> Hans 
> 
> -----------------------------------------------------------------
>                                           Hans Hagen | PRAGMA ADE
>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
>                                              | www.pragma-pod.nl
> -----------------------------------------------------------------

Thanks,

I've found the example of the different behaviour, though the reason 
isn't the comma, but the space after the command, I think. So even 
writing parameters one-per-line (with space left behind = last one 
without comma or percent sign) can be dangerous.

%\setuphead[chapter][style=\bfd]        % works
%\setuphead[chapter][style={\bfd}]      % works
%\setuphead[chapter][style={\bfd} ]     % doesn't work
%\setuphead[chapter][style={\bfd},]     % works
\starttext
\chapter{Test chapter}
\stoptext

This is not seriuos, I just want to find, how the things work.

Jano