             The LEMON Parser Generator

The Lemon program is an LALR(1) parser generator. It takes
a context free grammar and converts it into a subroutine
that will parse a file using that grammar.

Lemon is similar to the much more famous programs "YACC"
and "BISON". But lemon is not compatible with either yacc
or bison. There are several important differences:

 * Lemon using a different grammar syntax which is less
   prone to programming errors.

 * The parser generated by Lemon is both re-entrant and
   thread-safe.

 * Lemon includes the concept of a non-terminal destructor,
   which makes it much easier to write a parser that does
   not leak memory.

The complete source code to the lemon parser generator is
contained in two files. The file lemon.c is the parser
generator program itself. A separate file lempar.c is the
template for the parser subroutine that lemon generates.
Documentation on lemon is also available at:
http://www.hwaci.com/sw/lemon/lemon.html

Both the source code to lemon itself and the code that
lemon generates are in the public domain.

To see an example of how to use lemon, see the source code
to the SQLite database engine. Lemon is maintained as part
of the SQLite project.
