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k16shikano/torikae.tex

Last active August 29, 2015 14:21
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TeXマクロでオプション引数っぽいやつ
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torikae.tex
\newtoks\mytok
\def\torikae#1{\global\mytok\expandafter{#1}\futurelet\cs\dotorikae}
\def\dotorikae{\ifx\cs{\iffalse}\fi
\let\next\getoptional
\else
\let\next\relax
\the\mytok
\fi
\next}
\def\getoptional#1{%
\edef\@tempa{\the\mytok}
\global\mytok\expandafter{#1\@tempa}
\the\mytok}
\torikae{ABC}
\torikae{ABC}{DEF}
@k16shikano
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cf. http://oku.edu.mie-u.ac.jp/tex/mod/forum/discuss.php?d=1581

完全展開はしない

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