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%D \module
%D [ file=syst-ltx,
%D version=2009.10.13,
%D title=\CONTEXT\ System Macros,
%D subtitle=General,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
%D The bib module assumes that sometimes this command is used but
%D in \MKIV\ we no longer assume that.
%D
%D \macros
%D {newcommand}
%D
%D This module replaces \type {t-bibltx} and implements the
%D \LATEX\ newcommand (sort of). This command is not to be
%D used directly but only is there for the occasional
%D \BIBTEX\ file that uses it.
%D
%D \starttyping
%D \newcommand\oeps {oeps}
%D \newcommand\oeps[6] {oeps[#1]#6}
%D \newcommand\oeps[6][whatever]{oeps[#1]#6}
%D \stoptyping
\unprotect
\def\newcommand#1%
{\dotripleempty\donewcommand[#1]}
\def\donewcommand
{\ifthirdargument
\expandafter\donewcommandtwo
\else\ifsecondargument
\expandafter\expandafter\expandafter\donewcommandone
\else
\expandafter\expandafter\expandafter\donewcommandzero
\fi\fi}
\def\donewcommandzero[#1][#2][#3]%
{\long\def#1}
\def\donewcommandone[#1][#2][#3]%
{\scratchtoks{\long\def#1}%
\dorecurse{#2}{\scratchtoks\expandafter{\the\scratchtoks######1}}%
\the\scratchtoks}
\def\donewcommandtwo[#1][#2][#3]%
{\long\def#1{\doifnextcharelse[{\getvalue{>>\string#1>>}}{\getvalue{>>\string#1>>}[#3]}}%
\scratchtoks{\long\setvalue{>>\string#1>>}[##1]}%
\dostepwiserecurse{2}{#2}{1}{\scratchtoks\expandafter{\the\scratchtoks######1}}%
\the\scratchtoks}
\protect \endinput
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