texlive-boolexpr Subpackage of texlive

The \boolexpr macro evaluates 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 The \switch command (which is also expandable) has the form: \switch \case{<boolean expression>} ... \case{<boolean expression>} ... ... \otherwise ... \endswitch

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