NAME¶
Yacc - an LALR(1) parser generator for Java
SYNOPSIS¶
byaccj [ -dlrtvJ ] [ -b prefix ] [-Jclass= classname
] [-Jpackage= package_name ] [-Jextends=
extends_name ] [-Jimplements= implements_name ]
[-Jsemantic= semantic_type ] [-Jnorun] [-Jnocontruct]
[-Jstack= NNN ] [-Jnodebug] [-Jfinal] [-Jthrows=
exception_list ] filename
DESCRIPTION¶
Yacc 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 written in the C programming language.
Yacc normally writes the parse tables and the driver routine to the
file
y.tab.c.
The following options are available:
- -b prefix
- The -b option changes the prefix prepended to the output file names
to the string denoted by prefix. The default prefix is the
character y.
- -d
- The -d option causes the header file y.tab.h to be
written.
- -l
- If the -l option is not specified, yacc will insert The
generated code to the user's original code. If the -l option is
specified, yacc will not insert the
- -r
- The -r option causes yacc to produce separate files for code
and tables. The code file is named y.code.c, and the tables file is
named y.tab.c.
- -t
- The -t option changes the preprocessor directives generated by
yacc so that debugging statements will 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.
- -J
- The -J option switches from C/C++ to Java output. Not necessary if
other -J flags are used.
- -Jclass=<classname>
- Changes the name of the Java class (and .java file) to
classname
- -Jpackage=<packagename>
-
Changes the package in which the parser resides from the default
<nothing> to packagename
- -Jextends=<extend_name>
-
Changes the class the parser extends from the default <nothing> to
extend_name
- -Jimplements=<implement_name>
-
Changes the interface the parser implements from the default
<nothing> to implement_name
- -Jsemantic=<semantic_type>
-
Changes the semantic (value of the rules' variables) type to
semantic_type. No extra class will be generated.
- -Jnorun
- The -Jnorun option informs Byacc to not generate a run() method.
Useful when working with threads.
- -Jnoconstruct
- The -Jnoconstruct option informs Byacc to not generate
constructors. Useful when extending classes.
- -Jstack=<NNN>
-
Changes the stack size from default 500 to NNN
- -Jnodebug
- The -Jnodebug option informs Byacc to omit debugging code for
further better performance.
- -Jfinal
- The -Jfinal option makes generated class final.
- -Jthrows=<exception_list>
-
Informs Byacc to declare thrown exceptions for yyparse() method.
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 created.
FILES¶
y.code.c
y.tab.c
y.tab.h
y.output
/tmp/yacc.aXXXXXX
/tmp/yacc.tXXXXXX
/tmp/yacc.uXXXXXX
DIAGNOSTICS¶
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.