ChangeLog: Adjust.

[bison.git] / doc / bison.1

diff --git a/doc/bison.1 b/doc/bison.1
index 0cd949ee422e0c0e6b3e43d8fca1b823998293cb..ebcd396cde17ef30436a24e7265dd3ecc2f94d8e 100644 (file)
--- a/doc/bison.1
+++ b/doc/bison.1
@@ -32,10 +32,6 @@ bison \- GNU Project parser generator (yacc replacement)
 ] [
 .BI \-\-name-prefix= prefix
 ] [
-.B \-r
-] [
-.B \-\-raw
-] [
 .B \-t
 ] [
 .B \-\-debug
@@ -75,13 +71,22 @@ Unlike
 .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 
+.IR 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
-.B parse.y
+.B parse.yxx
 would produce the generated parser in a file named
-.BR parse.tab.c ,
+.BR parse.tab.cxx ,
 instead of
 .IR yacc 's
-.BR y.tab.c .
+.BR y.tab.c 
+or old 
+.IR Bison
+versions
+.BR parse.tab.c .
 .PP
 This description of the options that can be given to
 .I bison
@@ -140,31 +145,20 @@ in a separate source file, because
 needs to be able to refer to token type codes and the variable
 .BR yylval .
 .TP
-.B \-r
-.br
-.ns
-.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.)
-.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 \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
 .IR yytname .
-Also generated 
-are #defines for 
+Also generated
+are #defines for
 .IR YYNTOKENS ,
 .IR YYNNTS ,
 .IR YYNRULES ,
-and 
+and
 .IR YYNSTATES .
 .TP
 .B \-l
@@ -188,10 +182,10 @@ parser file, treating it an independent source file in its own right.
 .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 
+declarations.  The generated \fIname\fB.tab.c\fR file will have only
 constant declarations.  In addition, a \fIname\fB.act\fR file is
 generated containing a switch statement body containing all the
-translated actions. 
+translated actions.
 .TP
 .BI \-o " outfile"
 .br
@@ -224,7 +218,7 @@ The precise list of symbols renamed is
 .BR yylex ,
 .BR yyerror ,
 .BR yylval ,
-.BR yychar , 
+.BR yychar ,
 and
 .BR yydebug .
 .sp
@@ -241,7 +235,7 @@ and so on.
 .TP
 .B \-\-debug
 Output a definition of the macro
-.B YYDEBUG 
+.B YYDEBUG
 into the parser file,
 so that the debugging facilities are compiled.
 .TP
@@ -320,14 +314,21 @@ bison \-y $*
 .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 "ENVIRONMENT VARIABLES"
+.TP
+.SM BISON_SIMPLE
+If this is set, it specifies the location in which the
+.B bison.simple
+parser can be found.
+.TP
+.SM BISON_HAIRY
+If this is set, it specifies the location in which the
+.B bison.hairy
+parser can be found.
 .SH SEE ALSO
 .IR yacc (1)
 .br