[dev-context] processing comma/assignmentlist

[Hans Hagen]

Wolfgang Schuster wrote:
> 
> Am 19.07.2009 um 13:09 schrieb Hans Hagen:
> 
>>> 2. A command to access the keys and labels of a assignment list at 
>>> user level, e.g.
>>> \def\myassignmentlist[#1]%
>>>   {\def\dosomethingwithkeyandvalue##1##2##3{... ##2 ... ##3}% ##1 = 
>>> namespace (not used here)
>>>    \dogetparameter\dosomethingwithkeyandvalue[...][#1]}
>>> \myassignmentlist[..,..=..,..=..]
>>
>> is this the best name? maybe
>>
>> \getmyparameters[a=1,b=]\handler
> 
> Looks good but in the form
> 
> \processassignmentlist[a=1,b=2,...]\docommand
> 
> and (as equivalent to \processcommacommand)
> 
> \processassignmentcommand[\mylist]\docommand
> 
> where \docommand is defined as
> 
> \def\docommand#1#2{...} % #1 = key, #2 = value
> 

i added

\def\processassignmentlist[#1]#2% #2 == \command{key}{value]
   {\def\doprocessassignmententry##1{#2}% {##2}{##3} % namespace is ignored
    \dogetparameters\doprocessassignmententry[][#1]}

\def\processassignmentcommand[#1]%
   {\normalexpanded{\noexpand\processassignmentlist[][#1]}}


test case:

\def\showpair#1#2{key:#1, value:#2\par}

\processassignmentlist[a=1,b=2]\showpair




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