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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.
-