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yacc.man
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1992-06-07
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NAME
Yacc - an LALR(1) parser generator
SYNOPSIS
yacc [ -dlrtv ] [ -b prefix ] 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 \#line
directives in the generated code. The \#line directives let the C
compiler relate errors in the generated code to the user's original
code. If the -l option is specified, yacc will not insert the
\#line directives. \#line directives specified by the user will be
retained.
-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.
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.