%D \module
%D   [       file=syst-lua,
%D        version=2008.01.25,
%D          title=\CONTEXT\ System Macros,
%D       subtitle=Helper macros based on \LUA,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

\registerctxluafile{syst-lua}{1.001}

\unprotect

\def\expdoifelse#1#2{\ctxcommand{doifelse(\!!bs#1\!!es==\!!bs#2\!!es)}}
\def\expdoif    #1#2{\ctxcommand{doif    (\!!bs#1\!!es==\!!bs#2\!!es)}}
\def\expdoifnot #1#2{\ctxcommand{doifnot (\!!bs#1\!!es==\!!bs#2\!!es)}}

% \testfeatureonce{100000}{\doifelse{hello world}{here i am}{}}           % 0.3
% \testfeatureonce{100000}{\expandabledoifelse{hello world}{here i am}{}} % 1.5

\def\expdoifcommonelse#1#2{\ctxcommand{doifcommonelse("#1","#2")}}
\def\expdoifinsetelse #1#2{\ctxcommand{doifinsetelse("#1","#2")}}

% we define these here, just in case ...

\def\luastringsep{===} % this permits \typefile{self} otherwise nested b/e sep problems

\edef\!!bs{[\luastringsep[}
\edef\!!es{]\luastringsep]}

\unexpanded\def\writestatus#1#2{\ctxcommand{writestatus(\!!bs#1\!!es,\!!bs#2\!!es)}}

% A handy helper:

% \def\luaexpr#1{\ctxlua{context(tostring(#1))}} % more efficient:

% We can omit the tex.ctxcatcodes here as nowadays we seldom
% change the regime at the \TEX\ end:

\def\luaexpr#1{\directlua{tex.print(tostring(#1))}}

% helpers:

\def\ui_fo  #1{#1}
\def\ui_go  #1{}
\def\ui_ft#1#2{#1}
\def\ui_st#1#2{#2}

\protect \endinput