9f36c7f497
In case you're wondering, the gcc-2.7.2.1 import uses this to generate code. The size of the generated code is bigger than the entire bison release, making this a saving. The bison doc is pretty good apparently.
192 lines
4.5 KiB
Plaintext
192 lines
4.5 KiB
Plaintext
.!
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.! RUNOFF source file for BISON.HLP
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.!
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.! This is a RUNOFF input file which will produce a VMS help file
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.! for the VMS HELP library.
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.!
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.! Eric Youngdale and Wilfred J. Hansen (wjh+@cmu.edu).
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.!
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.literal
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.end literal
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.no paging
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.no flags all
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.right margin 70
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.left margin 1
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.indent -1
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1 BISON
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.skip
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The BISON command invokes the GNU BISON parser generator.
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.literal
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BISON file-spec
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.end literal
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.skip
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.indent -1
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2 Parameters
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file-spec
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.skip
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Here file-spec is the grammar file name, which usually ends in
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.y. The parser file's name is made by replacing the .y
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with _tab.c. Thus, the command bison foo.y yields
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foo_tab.c.
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.skip
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.indent -1
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2 Qualifiers
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The following is the list of available qualifiers for BISON:
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.literal
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/DEBUG
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/DEFINES
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/FILE_PREFIX=prefix
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/FIXED_OUTFILES
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/NAME_PREFIX=prefix
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/NOLINES
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/NOPARSER
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/OUTPUT=outfilefile
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/RAW
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/TOKEN_TABLE
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/VERBOSE
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/VERSION
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/YACC
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.end literal
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.skip
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.indent -1
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2 /DEBUG
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Output a definition of the macro YYDEBUG into the parser file,
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so that the debugging facilities are compiled.
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.skip
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.indent -1
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2 /DEFINES
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.skip
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Write an extra output file containing macro definitions for the token
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type names defined in the grammar and the semantic value type
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YYSTYPE, as well as a extern variable declarations.
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.skip
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If the parser output file is named "name.c" then this file
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is named "name.h".
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.skip
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This output file is essential if you wish to put the definition of
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yylex in a separate source file, because yylex needs to
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be able to refer to token type codes and the variable
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yylval.
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.skip
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.indent -1
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2 /FILE_PREFIX
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.skip
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.literal
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/FILIE_PREFIX=prefix
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.end literal
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.skip
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Specify a prefix to use for all Bison output file names. The names are
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chosen as if the input file were named prefix.c
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.skip
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.indent -1
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2 /FIXED_OUTFILES
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.skip
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Equivalent to /OUTPUT=y_tab.c; the parser output file is called
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y_tab.c, and the other outputs are called y.output and
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y_tab.h. The purpose of this switch is to imitate Yacc's output
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file name conventions. The /YACC qualifier is functionally equivalent
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to /FIXED_OUTFILES. The following command definition will
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work as a substitute for Yacc:
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.literal
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$YACC:==BISON/FIXED_OUTFILES
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.end literal
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.skip
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.indent -1
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2 /NAME_PREFIX
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.skip
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.literal
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/NAME_PREFIX=prefix
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.end literal
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.skip
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Rename the external symbols used in the parser so that they start with
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"prefix" instead of "yy". The precise list of symbols renamed
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is yyparse, yylex, yyerror, yylval, yychar and yydebug.
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For example, if you use /NAME_PREFIX="c", the names become cparse,
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clex, and so on.
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.skip
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.indent -1
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2 /NOLINES
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.skip
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Don't put any "#line" preprocessor commands in the parser file.
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Ordinarily Bison puts them in the parser file so that the C compiler
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and debuggers will associate errors with your source file, the
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grammar file. This option causes them to associate errors with the
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parser file, treating it an independent source file in its own right.
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.skip
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.indent -1
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2 /NOPARSER
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.skip
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Do not generate the parser code into the output; generate only
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declarations. The generated name_tab.c file will have only
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constant declarations. In addition, a name.act file is
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generated containing a switch statement body containing all the
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translated actions.
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.skip
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.indent -1
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2 /OUTPUT
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.skip
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.literal
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/OUTPUT=outfile
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.end literal
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.skip
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Specify the name "outfile" for the parser file.
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.skip
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.indent -1
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2 /RAW
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.skip
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When this switch is specified, the .tab.h file defines the tokens to
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have the bison token numbers rather than the yacc compatible numbers.
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To employ this switch you would have to have your own parser.
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.skip
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.indent -1
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2 /TOKEN_TABLE
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.skip
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This switch causes the name_tab.c output to include a list of
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token names in order by their token numbers; this is defined in the array
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yytname. Also generated are #defines for YYNTOKENS, YYNNTS, YYNRULES,
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and YYNSTATES.
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.skip
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.indent -1
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2 /VERBOSE
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.skip
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Write an extra output file containing verbose descriptions of the
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parser states and what is done for each type of look-ahead token in
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that state.
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.skip
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This file also describes all the conflicts, both those resolved by
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operator precedence and the unresolved ones.
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.skip
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The file's name is made by removing _tab.c or .c from
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the parser output file name, and adding .output instead.
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.skip
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Therefore, if the input file is foo.y, then the parser file is
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called foo_tab.c by default. As a consequence, the verbose
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output file is called foo.output.
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.skip
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.indent -1
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2 /VERSION
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.skip
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Print the version number of Bison.
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.skip
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.indent -1
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2 /YACC
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.skip
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See /FIXED_OUTFILES.
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.skip
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.indent -1
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