>> Hi,
>>
>> please consider the following minimal example:
>>
>> \def\before{\dodoubleempty\dobefore}%
>> \def\dobefore[#1][#2]{before}
>>
>> \starttext
>> \before[] after (should be: \before[]\ after without explicit \type{\ })\par
>> \before[]after\par
>> \before[][] after\par % this works
>> \before[][]after\par
>> \stoptext
>>
>> How can I prevent gobbling the following space, when the second optional
>> argument is not given (i.e. first line). The macro itself should not insert
>> space if the command is followed by any other character (2nd and 4th line).
>
>
> What do you want to achieve, maybe there is already something available.
Wolfgang, thank you very much! Recursion is really an elegant way. I wanted a
wrapper around \cite with the same functionality like natbib's \citep[][]{} and
\citet[][]{}, which saves a lot of typing. Especially if you start writing a
text and at a later point decide to have a citation in parenthesis instead of
textual. And of cause, if you switch between both styles in the same text.
Following your example, I came up with this now:
\def\citep[#1]%
{\strictdoifnextoptionalelse{\docitep[#1]}{\nocitep[#1]}}
\def\docitep[#1][#2]%
{\strictdoifnextoptionalelse{\dodocitep[#1][#2]}{\nodocitep[#1][#2]}}
\def\dodocitep[#1][#2][#3]%
{\cite[alternative=authoryears, left={(#1 }, extras={#2}][#3]}
\def\nodocitep[#1][#2]%
{\cite[alternative=authoryears, extras={#1}][#2]}
\def\nocitep[#1]%
{\cite[alternative=authoryears][#1]}
\setuppublications[state=start,refcommand=authoryear]
\setupbibtex[database=sample]
\starttext
\startlines
%\cite[hh2010a] % commenting this out does not work
\stoplines
\citep[, p.\ 1][hh2010a].\par
\citep[, p.\ 1][hh2010a] more text.\par
\citep[see][, p.\ 1][hh2010a].\par
\citep[see][][hh2010a] more text.\par
\startlines
\cite[hh2010a] % this is ok at the end
\stoplines
\stoptext
I noticed there is this error: using the first cite in \startlines...\stoplines
does not work.
Florian
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