* Unexpanded texdefinition produces “Undefined control sequence”
@ 2013-08-25 17:40 Marco Patzer
2013-08-25 18:56 ` Wolfgang Schuster
0 siblings, 1 reply; 6+ messages in thread
From: Marco Patzer @ 2013-08-25 17:40 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Hi,
the following example produces an “Undefined control sequence”
error. If \def is used instead of \starttexdefinition then there is
no error. Why?
\starttexcode
\installcommandhandler{foo}{foo}{foo}
\appendtoks
\setuevalue{start\currentfoo}{\foo@start[\currentfoo]}%%
\setuevalue{stop\currentfoo }{\foo@stop}%%
\to\everydefinefoo
\starttexdefinition unexpanded foo@start [#1]
\stoptexdefinition
%% works
%% \unexpanded\def\foo@stop{}
%% produces undefined control sequence error
\starttexdefinition unexpanded foo@stop
\stoptexdefinition
\stoptexcode
\definefoo [myfoo]
\starttext
\startmyfoo
Foobar
\stopmyfoo
\stoptext
Marco
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Unexpanded texdefinition produces “Undefined control sequence”
2013-08-25 17:40 Unexpanded texdefinition produces “Undefined control sequence” Marco Patzer
@ 2013-08-25 18:56 ` Wolfgang Schuster
2013-08-25 19:09 ` Marco Patzer
0 siblings, 1 reply; 6+ messages in thread
From: Wolfgang Schuster @ 2013-08-25 18:56 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 25.08.2013 um 19:40 schrieb Marco Patzer <lists@homerow.info>:
> Hi,
>
> the following example produces an “Undefined control sequence”
> error. If \def is used instead of \starttexdefinition then there is
> no error. Why?
The \starttexdefintion command looks for the “unexpanded” keyword
only when you apply also a argument but not when the arguments
are missing, i.e.
\starttexdefintion unexpanded mycommand #1#2
…
\stoptexdefinition
works but
\starttexdefintion unexpanded mycommand
…
\stoptexdefinition
doesn’t.
Wolfgang
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Unexpanded texdefinition produces “Undefined control sequence”
2013-08-25 18:56 ` Wolfgang Schuster
@ 2013-08-25 19:09 ` Marco Patzer
2013-08-25 19:21 ` Wolfgang Schuster
2013-08-26 10:10 ` Hans Hagen
0 siblings, 2 replies; 6+ messages in thread
From: Marco Patzer @ 2013-08-25 19:09 UTC (permalink / raw)
To: ntg-context
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On 2013–08–25 Wolfgang Schuster wrote:
> The \starttexdefintion command looks for the “unexpanded” keyword
> only when you apply also a argument but not when the arguments
> are missing, i.e.
Thanks for the explanation. Is that a bug or expected behaviour?
I think it's odd that
\unexpanded\def\foo{}
and
\starttexdefintion unexpanded foo
\stoptexdefinition
don't behave the same.
Marco
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Unexpanded texdefinition produces “Undefined control sequence”
2013-08-25 19:09 ` Marco Patzer
@ 2013-08-25 19:21 ` Wolfgang Schuster
2013-08-26 10:10 ` Hans Hagen
1 sibling, 0 replies; 6+ messages in thread
From: Wolfgang Schuster @ 2013-08-25 19:21 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 25.08.2013 um 21:09 schrieb Marco Patzer <lists@homerow.info>:
> On 2013–08–25 Wolfgang Schuster wrote:
>
>> The \starttexdefintion command looks for the “unexpanded” keyword
>> only when you apply also a argument but not when the arguments
>> are missing, i.e.
>
> Thanks for the explanation. Is that a bug or expected behaviour?
> I think it's odd that
>
> \unexpanded\def\foo{}
>
> and
>
> \starttexdefintion unexpanded foo
> \stoptexdefinition
>
> don't behave the same.
In the original definition of \starttexdefintion the only possible way to use it was
\starttexdefinition mycommand #1#2
where you needed a argument, later a form without parameters was added.
The “unexpanded” keyword came on another step and it’s possible Hans forgot
it in the simple form without parameters.
Wolfgang
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Unexpanded texdefinition produces “Undefined control sequence”
2013-08-25 19:09 ` Marco Patzer
2013-08-25 19:21 ` Wolfgang Schuster
@ 2013-08-26 10:10 ` Hans Hagen
2013-08-26 23:17 ` Marco Patzer
1 sibling, 1 reply; 6+ messages in thread
From: Hans Hagen @ 2013-08-26 10:10 UTC (permalink / raw)
To: ntg-context
On 8/25/2013 9:09 PM, Marco Patzer wrote:
> On 2013–08–25 Wolfgang Schuster wrote:
>
>> The \starttexdefintion command looks for the “unexpanded” keyword
>> only when you apply also a argument but not when the arguments
>> are missing, i.e.
>
> Thanks for the explanation. Is that a bug or expected behaviour?
> I think it's odd that
>
> \unexpanded\def\foo{}
>
> and
>
> \starttexdefintion unexpanded foo
> \stoptexdefinition
>
> don't behave the same.
not a bug ... just not implemented (as it's pretty complex to do that
case efficiently at the tex end)
anyhow, as it seems to be needed, i redid the code and now we have:
\starttext
\starttexdefinition unexpanded test #1
[here #1]
\stoptexdefinition
\test{oeps}
\starttexdefinition global unexpanded test
[here test]
\stoptexdefinition
\test
\scratchcounter=123
\starttexdefinition global unexpanded expanded test #oeps
[here #oeps: \the\scratchcounter]
\stoptexdefinition
\test{oeps}
\stoptext
so, three optional qualifiers (also in that order), so you'd better
wikify it
Hans
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___________________________________________________________________________________
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2013-08-25 17:40 Unexpanded texdefinition produces “Undefined control sequence” Marco Patzer
2013-08-25 18:56 ` Wolfgang Schuster
2013-08-25 19:09 ` Marco Patzer
2013-08-25 19:21 ` Wolfgang Schuster
2013-08-26 10:10 ` Hans Hagen
2013-08-26 23:17 ` Marco Patzer
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