boolexpr – A boolean expression evaluator and a switch command

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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