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Common-Description:
 Bison is a general-purpose parser generator that converts an annotated
 context-free grammar into a deterministic LR or generalized LR (GLR) parser
 employing LALR(1) parser tables.  As an experimental feature, Bison can also
 generate IELR(1) or canonical LR(1) parser tables.  Once you are proficient
 with Bison, you can use it to develop a wide range of language parsers, from
 those used in simple desk calculators to complex programming languages.
 .
 Bison is upward compatible with Yacc: all properly-written Yacc grammars ought
 to work with Bison with no change.  Anyone familiar with Yacc should be able to
 use Bison with little trouble.  You need to be fluent in C or C++ programming
 in order to use Bison or to understand this manual.  Java is also supported as
 an experimental feature.