beta (processaction & "|")

beta (processaction & "|")

[Peter Rolf]

Hi,

the vertical line symbol "|" (pipe) breaks \processaction (no problem
with the latest stable version). The minimal example at the end of this
message results in:

[..]
systems         : begin file processaction at line 3
! Undefined control sequence.
\dotextmodediscretionary ...up \let \nextnextnext
                                                  \egroup \def \next
##1#1{\...

\p!compareprocessaction ...]->\edef \!!stringb {#1
                                                  }\ifx \!!stringb
\s!defaul...

\next1 #1,->\p!doprocessaction {#1}
                                   \doprocesscommaitem
<argument> =>,
               unknown=>
\processnextcommalist ...dodoprocesscommaitem #4#5
                                                  ,]\relax \global
\advance ...
l.9   unknown=>]

?

Greetings, Peter

-----

\setupoutput[pdftex]

\starttext

\def\FOO{}

\processaction[\FOO][
  |=>,
  unknown=>]

\stoptext

Re: beta (processaction & "|")

[Hans Hagen]

Peter Rolf wrote:
> \processaction[\FOO][
>   |=>,
>   unknown=>]
>   
hm, | and ~ are always special, put \string in fron tof it, or use \letterbar and \lettertilde 

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
-----------------------------------------------------------------

Re: beta (processaction & "|")

[Peter Rolf]

Hans Hagen wrote:
> Peter Rolf wrote:
>> \processaction[\FOO][
>>   |=>,
>>   unknown=>]
>>   
> hm, | and ~ are always special, put \string in fron tof it, or use \letterbar and \lettertilde 
>
hm, same error if I use \string| or \letterbar

Peter

> 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
> -----------------------------------------------------------------
> 
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 
> 

Re: beta (processaction & "|")

[Hans Hagen]

Peter Rolf wrote:
> Hans Hagen wrote:
>   
>> Peter Rolf wrote:
>>     
>>> \processaction[\FOO][
>>>   |=>,
>>>   unknown=>]
>>>   
>>>       
>> hm, | and ~ are always special, put \string in fron tof it, or use \letterbar and \lettertilde 
>>
>>     
> hm, same error if I use \string| or \letterbar
>   
do you have a minimal tes file?

a solution may be

\let\savedbarcommand=|

\unexpanded\def|{\savedbarcommand}

 

-----------------------------------------------------------------
                                          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
-----------------------------------------------------------------

Re: beta (processaction & "|")

[Peter Rolf]

Hans Hagen wrote:
> Peter Rolf wrote:
>> Hans Hagen wrote:
>>   
>>> Peter Rolf wrote:
>>>     
>>>> \processaction[\FOO][
>>>>   |=>,
>>>>   unknown=>]
>>>>   
>>>>       
>>> hm, | and ~ are always special, put \string in fron tof it, or use \letterbar and \lettertilde 
>>>
>>>     
>> hm, same error if I use \string| or \letterbar
>>   
> do you have a minimal tes file?
>
not any longer...

> a solution may be
> 
> \let\savedbarcommand=|
> 
> \unexpanded\def|{\savedbarcommand}
>

I'll try this tomorrow and also try to make a new minimal example.
Thanks anyway,

Peter

>  
> 
> -----------------------------------------------------------------
>                                           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
> -----------------------------------------------------------------
> 
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 
> 

Re: beta (processaction & "|")

[Peter Rolf]

Hans Hagen wrote:
> Peter Rolf wrote:
>> Hans Hagen wrote:
>>   
>>> Peter Rolf wrote:
>>>     
>>>> \processaction[\FOO][
>>>>   |=>,
>>>>   unknown=>]
>>>>   
>>>>       
>>> hm, | and ~ are always special, put \string in fron tof it, or use \letterbar and \lettertilde 
>>>
>>>     
>> hm, same error if I use \string| or \letterbar
>>   
> do you have a minimal tes file?
> 
> a solution may be
> 
> \let\savedbarcommand=|
> 
> \unexpanded\def|{\savedbarcommand}
>
Yes, this works.

I've tried to create a minimal example, but in the end all points to the
fact, that "|" is a special character. So even the use of "|" as
argument of some macro like

 \FOO[data={||abcx}]{..}

is not recommended (without prior catcode change). I use the symbols as
an abbreviation for different MP graphics, and it wouldn't make sense to
write \letterbar every time. Looks like I have to choose a different symbol.

Greetings, Peter

>  
> 
> -----------------------------------------------------------------
>                                           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
> -----------------------------------------------------------------
> 
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 
> 

Re: beta (processaction & "|")

[Hans Hagen]

Peter Rolf wrote:
> Hans Hagen wrote:
>   
>> Peter Rolf wrote:
>>     
>>> Hans Hagen wrote:
>>>   
>>>       
>>>> Peter Rolf wrote:
>>>>     
>>>>         
>>>>> \processaction[\FOO][
>>>>>   |=>,
>>>>>   unknown=>]
>>>>>   
>>>>>       
>>>>>           
>>>> hm, | and ~ are always special, put \string in fron tof it, or use \letterbar and \lettertilde 
>>>>
>>>>     
>>>>         
>>> hm, same error if I use \string| or \letterbar
>>>   
>>>       
>> do you have a minimal tes file?
>>
>> a solution may be
>>
>> \let\savedbarcommand=|
>>
>> \unexpanded\def|{\savedbarcommand}
>>
>>     
> Yes, this works.
>
> I've tried to create a minimal example, but in the end all points to the
> fact, that "|" is a special character. So even the use of "|" as
> argument of some macro like
>
>  \FOO[data={||abcx}]{..}
>
> is not recommended (without prior catcode change). I use the symbols as
> an abbreviation for different MP graphics, and it wouldn't make sense to
> write \letterbar every time. Looks like I have to choose a different symbol.
>   
still experimental is that you can change the catcodetable (pseudo in 
mkii, native in mkiv) but i won't bring up it's dirty details here


\let\savedbarcommand=|
 
\unexpanded\def|{\savedbarcommand}

this makes them unexpandable but still using ~ and | for such purposes is kind of tricky 

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
-----------------------------------------------------------------