Example macros to help experiment with using the C pre-processor in non-trivial ways.
If you actually create code based on macrolib macros,
copy and rename the macrolib macros! Macros cannot
be expanded recursively, so for example if you make
a macro that uses MACROLIB_REDUCE without renaming
all the "MACROLIB" prefixes, that macro is unusable
inside another use of MACROLIB_REDUCE - but if you
copy and rename all ”MACROLIB" macros that you use,
that problem doesn't happen. So use macrolib.h for
experimentation and initial development, then copy
and rename the macros when you got something usable.
TODO: Documentation/comments/explanation/education.