My current proposal to document follows. Writing it shows that I should provide a consistent name for the output stream in the implementation. C++ used debug_stream(), which is uselessly complex. We used to use yyout, but that clashed with some #define that flex exports in its headers (see http://lists.gnu.org/archive/html/help-flex/2002-11/msg00053.html for instance). So we moved to yyoutput, which seems uselessly long to me. What people would think of yyo? To deploy in a backward compatible way, of course.
Once this patch is tuned and accepted for master, I will back-port it for maint, as I really want to see %printer documented).
0001-doc-mfcalc-demonstrate-printer.patch
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