bachotex2005-david-kastrup-pearl1.tex
bachotex2005-david-kastrup-pearl1.tex
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%%% David Kastrup: Comparing strings known to consist only of characters
\def\strequal#1{\number\strequalstart{}{}#1\relax}
\def\strequalstart#1#2#3{\if#3\relax\strequalstop\fi
\strequalstart{\if#3#1}{#2\fi}}
\def\strequalstop\fi\strequalstart#1#2#3{\fi#1#3\relax'#213 }
% example
\if\strequal{junk}{junk}yes\else no\fi,
\if\strequal{junk}{Junk}yes\else no\fi.
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