The Bison manual for 2.3 use %printer but doesn't describe it.
How does on use %printer?
Will it change much in 2.4?
What exactly does it do, it allows one to at runtime customize the message
Bison uses for a token(and perhaps even terminal?)? For example, that instead
of that Bison says "Unexpected <numeric literal>" one can make it
say "Unexpected '2.3'", right?
I'm trying to determine whether it's worth to start using it before 2.4, and
if so, /how/ to use it ;-)
Cheers,
Frans
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