-** Laxism in Bison invocation arguments:
-The flag_argmatch functions were meant to be generic. The introduction of
--Werror= in generic code is a bit troublesome, and generates weird
-behaviour. Because seeing "error=" causes Bison to match the subsequent
-categories with a generic procedure, but on a very specific variable, the
-following commands are legal, and equivalent:
-
-$ bison -Werror=yacc # OK
-$ bison --warnings=error=yacc # err, looks very weird?
-$ bison -rerror=itemsets # this value of 'report' enum has a value
- # of '1 << 1', just like Wyacc
-$ bison --report=error=itemsets # (same)
-$ bison -ferror=caret # (same)
-$ bison --feature=error=caret # (same)
-
-Basically, writing -rerror={THINGS} or -ferror={FEATURE} is not prohibited,
-and results in UB.
-
-I don't think there is any reason for the user to expect anything out of
-these options (this implementation-driven behavior is not documented of
-course, as it isn't exactly a feature), so this bug isn't critical but
-should be addressed some day nonetheless.
-