Sync from automake 1.7.5.

[bison.git] / doc / bison.1

diff --git a/doc/bison.1 b/doc/bison.1
index 0cd949ee422e0c0e6b3e43d8fca1b823998293cb..5e1d962d8bf14cb29f769b18201d058fe88859df 100644 (file)
--- a/doc/bison.1
+++ b/doc/bison.1
@@ -10,7 +10,11 @@ bison \- GNU Project parser generator (yacc replacement)
 ] [
 .B \-d
 ] [
 ] [
 .B \-d
 ] [

-.B \-\-defines
+.BI \-\-defines= defines-file
+] [
+.B \-g
+] [
+.BI \-\-graph= graph-file

 ] [
 .B \-k
 ] [
 ] [
 .B \-k
 ] [


@@ -32,10 +36,6 @@ bison \- GNU Project parser generator (yacc replacement)
 ] [
 .BI \-\-name-prefix= prefix
 ] [
 ] [
 .BI \-\-name-prefix= prefix
 ] [

-.B \-r
-] [
-.B \-\-raw
-] [

 .B \-t
 ] [
 .B \-\-debug
 .B \-t
 ] [
 .B \-\-debug


@@ -59,6 +59,11 @@ bison \- GNU Project parser generator (yacc replacement)
 .B \-\-fixed-output-files
 ]
 file
 .B \-\-fixed-output-files
 ]
 file

+.br
+.B yacc
+[
+.I "similar options and operands"
+]

 .SH DESCRIPTION
 .I Bison
 is a parser generator in the style of
 .SH DESCRIPTION
 .I Bison
 is a parser generator in the style of


@@ -75,13 +80,22 @@ Unlike
 .IR yacc ,
 the generated files do not have fixed names, but instead use the prefix
 of the input file.
 .IR yacc ,
 the generated files do not have fixed names, but instead use the prefix
 of the input file.

+Moreover, if you need to put
+.I C++
+code in the input file, you can end his name by a C++-like extension
+(.ypp or .y++), then bison will follow your extension to name the
+output file (.cpp or .c++).

 For instance, a grammar description file named
 For instance, a grammar description file named

-.B parse.y
+.B parse.yxx

 would produce the generated parser in a file named
 would produce the generated parser in a file named

-.BR parse.tab.c ,
+.BR parse.tab.cxx ,

 instead of
 .IR yacc 's
 instead of
 .IR yacc 's

-.BR y.tab.c .
+.B y.tab.c
+or old
+.I Bison
+version's
+.BR parse.tab.c .

 .PP
 This description of the options that can be given to
 .I bison
 .PP
 This description of the options that can be given to
 .I bison


@@ -113,13 +127,11 @@ Specify a prefix to use for all
 .I bison
 output file names.  The names are
 chosen as if the input file were named
 .I bison
 output file names.  The names are
 chosen as if the input file were named

-\fIfile-prefix\fB.c\fR.
+\fIfile-prefix\fP\fB.c\fP.

 .TP
 .B \-d
 .br
 .ns
 .TP
 .B \-d
 .br
 .ns

-.TP
-.B \-\-defines

 Write an extra output file containing macro definitions for the token
 type names defined in the grammar and the semantic value type
 .BR YYSTYPE ,
 Write an extra output file containing macro definitions for the token
 type names defined in the grammar and the semantic value type
 .BR YYSTYPE ,


@@ -128,10 +140,10 @@ as well as a few
 variable declarations.
 .sp
 If the parser output file is named
 variable declarations.
 .sp
 If the parser output file is named

-\fIname\fB.c\fR
+.IB name .c

 then this file
 is named
 then this file
 is named

-\fIname\fB.h\fR.
+\fIname\fP\fB.h\fP.

 .sp
 This output file is essential if you wish to put the definition of
 .B yylex
 .sp
 This output file is essential if you wish to put the definition of
 .B yylex


@@ -140,31 +152,48 @@ in a separate source file, because
 needs to be able to refer to token type codes and the variable
 .BR yylval .
 .TP
 needs to be able to refer to token type codes and the variable
 .BR yylval .
 .TP

-.B \-r
+.BI \-\-defines= defines-file
+The behavior of
+.B \-\-defines
+is the same than
+.B \-d
+option.
+The only difference is that it has an optional argument which is
+the name of the output filename.
+.TP
+.BI \-g

 .br
 .ns
 .br
 .ns

+Output a VCG definition of the LALR(1) grammar automaton computed by
+Bison.  If the grammar file is
+.BR foo.y
+, the VCG output file will be
+.BR foo.vcg .

 .TP
 .TP

-.B \-\-raw
-The token numbers in the \fIname\fB.h\fR file are usually the Yacc compatible 
-translations.  If this switch is specified, Bison token numbers
-are output instead.  (Yacc numbers start at 257 except for single character 
-tokens;  Bison assigns token numbers sequentially for all tokens 
-starting at 3.)
+.BI \-\-graph= graph-file
+The behavior of
+.BI \-\-graph
+is the same than
+.BI \-g
+option.  The only difference is that it has an optional argument which
+is the name of the output graph filename.

 .TP
 .B \-k
 .br
 .ns
 .TP
 .B \-\-token-table
 .TP
 .B \-k
 .br
 .ns
 .TP
 .B \-\-token-table

-This switch causes the \fIname\fB.tab.c\fR output to include a list of 
-token names in order by their token numbers;  this is defined in the array 
+This switch causes the
+.IB name .tab.c
+output to include a list of
+token names in order by their token numbers; this is defined in the array

 .IR yytname .
 .IR yytname .

-Also generated 
-are #defines for 
+Also generated
+are #defines for

 .IR YYNTOKENS ,
 .IR YYNNTS ,
 .IR YYNRULES ,
 .IR YYNTOKENS ,
 .IR YYNNTS ,
 .IR YYNRULES ,

-and 
+and

 .IR YYNSTATES .
 .TP
 .B \-l
 .IR YYNSTATES .
 .TP
 .B \-l


@@ -187,11 +216,15 @@ parser file, treating it an independent source file in its own right.
 .ns
 .TP
 .B \-\-no-parser
 .ns
 .TP
 .B \-\-no-parser

-Do not generate the parser code into the output;  generate only
-declarations.  The generated \fIname\fB.tab.c\fR file will have only 
-constant declarations.  In addition, a \fIname\fB.act\fR file is
+Do not generate the parser code into the output; generate only
+declarations.  The generated
+.IB name .tab.c
+file will have only
+constant declarations.  In addition, a
+.IB name .act
+file is

 generated containing a switch statement body containing all the
 generated containing a switch statement body containing all the

-translated actions. 
+translated actions.

 .TP
 .BI \-o " outfile"
 .br
 .TP
 .BI \-o " outfile"
 .br


@@ -224,7 +257,7 @@ The precise list of symbols renamed is
 .BR yylex ,
 .BR yyerror ,
 .BR yylval ,
 .BR yylex ,
 .BR yyerror ,
 .BR yylval ,

-.BR yychar , 
+.BR yychar ,

 and
 .BR yydebug .
 .sp
 and
 .BR yydebug .
 .sp


@@ -240,9 +273,9 @@ and so on.
 .ns
 .TP
 .B \-\-debug
 .ns
 .TP
 .B \-\-debug

-Output a definition of the macro
-.B YYDEBUG 
-into the parser file,
+In the parser file, define the macro
+.B YYDEBUG
+to 1 if it is not already defined,

 so that the debugging facilities are compiled.
 .TP
 .B \-v
 so that the debugging facilities are compiled.
 .TP
 .B \-v


@@ -312,22 +345,16 @@ The purpose of this switch is to imitate
 .IR yacc 's
 output file name conventions.
 Thus, the following shell script can substitute for
 .IR yacc 's
 output file name conventions.
 Thus, the following shell script can substitute for

+.I yacc
+and is often installed as

 .IR yacc :
 .sp
 .RS
 .ft B
 .IR yacc :
 .sp
 .RS
 .ft B

-bison \-y $*
+bison \-y "$@"

 .ft R
 .sp
 .RE
 .ft R
 .sp
 .RE

-.PP
-The long-named options can be introduced with `+' as well as `\-\-',
-for compatibility with previous releases.  Eventually support for `+'
-will be removed, because it is incompatible with the POSIX.2 standard.
-.SH FILES
-/usr/local/lib/bison.simple    simple parser
-.br
-/usr/local/lib/bison.hairy     complicated parser

 .SH SEE ALSO
 .IR yacc (1)
 .br
 .SH SEE ALSO
 .IR yacc (1)
 .br