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diff --git a/macros/latex/contrib/boolexpr/README b/macros/latex/contrib/boolexpr/README new file mode 100644 index 0000000000..aefb3b73bd --- /dev/null +++ b/macros/latex/contrib/boolexpr/README @@ -0,0 +1,64 @@ +% boolexpr : Purely expandable boolean expressions and switch (eTeX - v3.1 2009/09/30) +% +% The \boolexpr macro evaluate boolean expressions in a *purely expandable way*. +% +% \boolexpr{ A \OR B \AND C } expands to 0 if the logical expression is TRUE. +% +% A, B, C may be : +% - numeric expressions such as: x = y, x <> y, x > y or: x < y +% - boolean switches: \iftrue 0\else 1\fi +% - conditionals: \ifcsname whatsit\endcsname 0\else 1\fi +% - another \boolexpr: \boolexpr{ D \OR E \AND F } +% +% \boolexpr may be used with \ifcase: +% \ifcase\boolexpr{ A \OR B \AND C } +% What to do if true +% \else +% What to do if false +% \fi +% +% \switch remains *purely expandable* (it may be used inside \csname...\endcsname f.ex.) +% +% \switch +% \case{ boolean expression} to do in first case +% \case{ boolean expression} to do in second case +% \otherwise to do if no case were true +% \endswitch +% +% \switch may have an optional argument to repeat in each \case evaluation, e.g. : +% +% \switch[\value{myCounter}] +% %|--| ---------------------------------------------------> |--| +% \case{>=12}It's $>=12$% => \case will expand to : \case{\value{myCounter}>=12} +% \case{=1}It's $1$% => \case will expand to : \case{\value{myCounter}=1} +% \otherwise ... +% \endswitch +% +% or : *(NB the double curly braces)* +% \switch[\pdfstrcmp{dummy}}] +% %|-----| ------------------------------------------------> |-----| +% \case{{first}}It's "FiRsT"% => \case{\lowercase{\ifstrequal{dummy}}{first}} +% \case{{second}}It"s "SeCoNd"%=> \case{\lowercase{\ifstrequal{dummy}}{second} +% \endswitch +% +% ********************************************************************************* +% This work consists of the main source file boolexpr.dtx and the derived +% files : boolexpr.sty, boolexpr.pdf, boolexpr.ins +% +% Some examples are included in the documentation: it is preferable (albeit +% not necessary) to install boolexpr.sty before compiling the documentation. +% +% Unpacking: +% (a) If boolexpr.ins is present: +% etex boolexpr.ins +% (b) Without boolexpr.ins: +% etex boolexpr.dtx +% (c) If you insist on using LaTeX +% latex \let\install=y\input{boolexpr.dtx} +% (quote the arguments according to the demands of your shell) +% +% Documentation: +% (pdf)latex boolexpr.dtx +% makeindex -s gind.ist boolexpr.idx +% +% F Chervet - Jul-Sep 2009
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