jay - an LALR(1) parser generator for Java and C#
jay [ -tv ] [ -c ] [ -p ] [ -b file_prefix ] [ -V yyValue ] filename <
Jay reads the grammar specification in the file filename and generates
an LR(1) parser for it. The parsers consist of a set of LALR(1)
parsing tables and a driver routine from the file skeleton written in
the Java programming language. Jay writes the parse tables and the
driver routine to standard output.
The following options are available:
The -b option changes the prefix prepended to the output
file names to the string denoted by file_prefix. The
default prefix is the character y.
-c The -c option makes jay generate C# code instead of the
-t The -t option arranges for debugging information to be
incorporated in the compiled code.
-v The -v option causes a human-readable description of the
generated parser to be written to the file y.output.
-p The -p option causes jay to print the directory in which
its sample skeleton files are installed. If a project
wants to use the default skeleton file included with jay,
it can use this option in a makefile to find the path to
the skeleton or skeleton.cs file included with the jay
If the environment variable TMPDIR is set, the string denoted by TMPDIR
will be used as the name of the directory where the temporary files are
If there are rules that are never reduced, the number of such rules is
reported on standard error. If there are any LALR(1) conflicts, the
number of conflicts is reported on standard error.
Jay is derived from Berkeley yacc . Input conventions closely follow
those of yacc ; for details, consult the parser skeleton file and the
commented example included with the sources.