Reformat NEWS.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index d0fc7abbc508891cce21f667c654ca73d123ac0c..fe1144eca94ccddad4c59cf1fda48ac6805fb215 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,21 +1,48 @@
 Bison News
 ----------
 
 Bison News
 ----------
 

-Changes in version 2.3a+ (????-??-??):
+* Changes in version ?.? (????-??-??):

 
 

-* The quotes around NAME that used to be required in the following directive
+* Changes in version 2.4.2 (????-??-??):
+
+* Changes in version 2.4.1 (2008-12-11):
+
+* Java skeleton improvements:
+
+  The constants for token names were moved to the Lexer interface.
+  Also, it is possible to add code to the parser's constructors using
+  "%code init" and "%define init_throws".
+
+* Changes in version 2.4 (2008-11-02):
+
+** %language is an experimental feature.
+
+  We first introduced this feature in test release 2.3b as a cleaner
+  alternative to %skeleton.  Since then, we have discussed the possibility of
+  modifying its effect on Bison's output file names.  Thus, in this release,
+  we consider %language to be an experimental feature that will likely evolve
+  in future releases.
+
+** Forward compatibility with GNU M4 has been improved.
+
+** Several bugs in the C++ skeleton and the experimental Java skeleton have been
+  fixed.
+
+* Changes in version 2.3b (2008-05-27):
+
+** The quotes around NAME that used to be required in the following directive

   are now deprecated:
 
     %define NAME "VALUE"
 
   are now deprecated:
 
     %define NAME "VALUE"
 

-* The directive `%pure-parser' is now deprecated in favor of:
+** The directive `%pure-parser' is now deprecated in favor of:

 
     %define api.pure
 
   which has the same effect except that Bison is more careful to warn about
   unreasonable usage in the latter case.
 
 
     %define api.pure
 
   which has the same effect except that Bison is more careful to warn about
   unreasonable usage in the latter case.
 

-* Push Parsing
+** Push Parsing

 
   Bison can now generate an LALR(1) parser in C with a push interface.  That
   is, instead of invoking `yyparse', which pulls tokens from `yylex', you can
 
   Bison can now generate an LALR(1) parser in C with a push interface.  That
   is, instead of invoking `yyparse', which pulls tokens from `yylex', you can


@@ -28,25 +55,48 @@ Changes in version 2.3a+ (????-??-??):
 
   See the new section `A Push Parser' in the Bison manual for details.
 
 
   See the new section `A Push Parser' in the Bison manual for details.
 

-* The -g and --graph options now output graphs in Graphviz DOT format,
-  not VCG format.
+  The current push parsing interface is experimental and may evolve.  More user
+  feedback will help to stabilize it.

 
 

-* An experimental directive %language specifies the language of the
-  generated parser, which can be C (the default) or C++.  This
-  directive affects the skeleton used, and the names of the generated
-  files if the grammar file's name ends in ".y".
+** The -g and --graph options now output graphs in Graphviz DOT format,
+  not VCG format.  Like --graph, -g now also takes an optional FILE argument
+  and thus cannot be bundled with other short options.

 
 

-* The grammar file may now specify the name of the parser header file using
+** Java
+
+  Bison can now generate an LALR(1) parser in Java.  The skeleton is
+  `data/lalr1.java'.  Consider using the new %language directive instead of
+  %skeleton to select it.
+
+  See the new section `Java Parsers' in the Bison manual for details.
+
+  The current Java interface is experimental and may evolve.  More user
+  feedback will help to stabilize it.
+
+** %language
+
+  This new directive specifies the programming language of the generated
+  parser, which can be C (the default), C++, or Java.  Besides the skeleton
+  that Bison uses, the directive affects the names of the generated files if
+  the grammar file's name ends in ".y".
+
+** XML Automaton Report
+
+  Bison can now generate an XML report of the LALR(1) automaton using the new
+  `--xml' option.  The current XML schema is experimental and may evolve.  More
+  user feedback will help to stabilize it.
+
+** The grammar file may now specify the name of the parser header file using

   %defines.  For example:
 
     %defines "parser.h"
 
   %defines.  For example:
 
     %defines "parser.h"
 

-* When reporting useless rules, useless nonterminals, and unused terminals,
+** When reporting useless rules, useless nonterminals, and unused terminals,

   Bison now employs the terms "useless in grammar" instead of "useless",
   "useless in parser" instead of "never reduced", and "unused in grammar"
   instead of "unused".
 
   Bison now employs the terms "useless in grammar" instead of "useless",
   "useless in parser" instead of "never reduced", and "unused in grammar"
   instead of "unused".
 

-* Unreachable State Removal
+** Unreachable State Removal

 
   Previously, Bison sometimes generated parser tables containing unreachable
   states.  A state can become unreachable during conflict resolution if Bison
 
   Previously, Bison sometimes generated parser tables containing unreachable
   states.  A state can become unreachable during conflict resolution if Bison


@@ -68,8 +118,8 @@ Changes in version 2.3a+ (????-??-??):
   See the %define entry in the `Bison Declaration Summary' in the Bison manual
   for further discussion.
 
   See the %define entry in the `Bison Declaration Summary' in the Bison manual
   for further discussion.
 

-* Lookahead Set Correction in the `.output' Report
-  
+** Lookahead Set Correction in the `.output' Report
+

   When instructed to generate a `.output' file including lookahead sets
   (using `--report=lookahead', for example), Bison now prints each reduction's
   lookahead set only next to the associated state's one item that (1) is
   When instructed to generate a `.output' file including lookahead sets
   (using `--report=lookahead', for example), Bison now prints each reduction's
   lookahead set only next to the associated state's one item that (1) is


@@ -79,16 +129,17 @@ Changes in version 2.3a+ (????-??-??):
   bug affected only the `.output' file and not the generated parser source
   code.
 
   bug affected only the `.output' file and not the generated parser source
   code.
 

-* --report-file=FILE is a new flag to override the default `.output' file name.
+** --report-file=FILE is a new option to override the default `.output' file
+  name.

 
 

-* The `=' that used to be required in the following directives is now
+** The `=' that used to be required in the following directives is now

   deprecated:
 
     %file-prefix "parser"
     %name-prefix "c_"
     %output "parser.c"
 
   deprecated:
 
     %file-prefix "parser"
     %name-prefix "c_"
     %output "parser.c"
 

-* An Alternative to `%{...%}' -- `%code QUALIFIER {CODE}'
+** An Alternative to `%{...%}' -- `%code QUALIFIER {CODE}'

 
   Bison 2.3a provided a new set of directives as a more flexible alternative to
   the traditional Yacc prologue blocks.  Those have now been consolidated into
 
   Bison 2.3a provided a new set of directives as a more flexible alternative to
   the traditional Yacc prologue blocks.  Those have now been consolidated into


@@ -109,7 +160,7 @@ Changes in version 2.3a+ (????-??-??):
   The prologue alternatives are experimental.  More user feedback will help to
   determine whether they should become permanent features.
 
   The prologue alternatives are experimental.  More user feedback will help to
   determine whether they should become permanent features.
 

-* Revised warning: unset or unused mid-rule values
+** Revised warning: unset or unused mid-rule values

 
   Since Bison 2.2, Bison has warned about mid-rule values that are set but not
   used within any of the actions of the parent rule.  For example, Bison warns
 
   Since Bison 2.2, Bison has warned about mid-rule values that are set but not
   used within any of the actions of the parent rule.  For example, Bison warns


@@ -126,10 +177,10 @@ Changes in version 2.3a+ (????-??-??):
   sometimes prove to be false alarms in existing grammars employing the Yacc
   constructs $0 or $-N (where N is some positive integer).
 
   sometimes prove to be false alarms in existing grammars employing the Yacc
   constructs $0 or $-N (where N is some positive integer).
 

-  To enable these warnings, specify the flag `--warnings=midrule-values' or
+  To enable these warnings, specify the option `--warnings=midrule-values' or

   `-W', which is a synonym for `--warnings=all'.
 
   `-W', which is a synonym for `--warnings=all'.
 

-* Default %destructor or %printer with `<*>' or `<>'
+** Default %destructor or %printer with `<*>' or `<>'

 
   Bison now recognizes two separate kinds of default %destructor's and
   %printer's:
 
   Bison now recognizes two separate kinds of default %destructor's and
   %printer's:


@@ -154,22 +205,25 @@ Changes in version 2.3a+ (????-??-??):
   See the section `Freeing Discarded Symbols' in the Bison manual for further
   details.
 
   See the section `Freeing Discarded Symbols' in the Bison manual for further
   details.
 

-* %left, %right, and %nonassoc can now declare token numbers.  This is required
+** %left, %right, and %nonassoc can now declare token numbers.  This is required

   by POSIX.  However, see the end of section `Operator Precedence' in the Bison
   manual for a caveat concerning the treatment of literal strings.
 
   by POSIX.  However, see the end of section `Operator Precedence' in the Bison
   manual for a caveat concerning the treatment of literal strings.
 

-Changes in version 2.3a, 2006-09-13:
+** The nonfunctional --no-parser, -n, and %no-parser options have been
+  completely removed from Bison.
+
+* Changes in version 2.3a, 2006-09-13:

 
 

-* Instead of %union, you can define and use your own union type
+** Instead of %union, you can define and use your own union type

   YYSTYPE if your grammar contains at least one <type> tag.
   Your YYSTYPE need not be a macro; it can be a typedef.
   This change is for compatibility with other Yacc implementations,
   and is required by POSIX.
 
   YYSTYPE if your grammar contains at least one <type> tag.
   Your YYSTYPE need not be a macro; it can be a typedef.
   This change is for compatibility with other Yacc implementations,
   and is required by POSIX.
 

-* Locations columns and lines start at 1.
+** Locations columns and lines start at 1.

   In accordance with the GNU Coding Standards and Emacs.
 
   In accordance with the GNU Coding Standards and Emacs.
 

-* You may now declare per-type and default %destructor's and %printer's:
+** You may now declare per-type and default %destructor's and %printer's:

 
   For example:
 
 
   For example:
 


@@ -195,13 +249,13 @@ Changes in version 2.3a, 2006-09-13:
   %destructor's and %printer's were experimental, and they were rewritten in
   future versions.]
 
   %destructor's and %printer's were experimental, and they were rewritten in
   future versions.]
 

-* Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y',
+** Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y',

   `--yacc', or `%yacc'), Bison no longer generates #define statements for
   associating token numbers with token names.  Removing the #define statements
   helps to sanitize the global namespace during preprocessing, but POSIX Yacc
   requires them.  Bison still generates an enum for token names in all cases.
 
   `--yacc', or `%yacc'), Bison no longer generates #define statements for
   associating token numbers with token names.  Removing the #define statements
   helps to sanitize the global namespace during preprocessing, but POSIX Yacc
   requires them.  Bison still generates an enum for token names in all cases.
 

-* Handling of traditional Yacc prologue blocks is now more consistent but
+** Handling of traditional Yacc prologue blocks is now more consistent but

   potentially incompatible with previous releases of Bison.
 
   As before, you declare prologue blocks in your grammar file with the
   potentially incompatible with previous releases of Bison.
 
   As before, you declare prologue blocks in your grammar file with the


@@ -220,7 +274,7 @@ Changes in version 2.3a, 2006-09-13:
   Now, Bison never inserts the pre-prologue into the header file.  In the code
   file, it always inserts it before the token definitions.
 
   Now, Bison never inserts the pre-prologue into the header file.  In the code
   file, it always inserts it before the token definitions.
 

-* Bison now provides a more flexible alternative to the traditional Yacc
+** Bison now provides a more flexible alternative to the traditional Yacc

   prologue blocks: %before-header, %start-header, %end-header, and
   %after-header.
 
   prologue blocks: %before-header, %start-header, %end-header, and
   %after-header.
 


@@ -268,32 +322,32 @@ Changes in version 2.3a, 2006-09-13:
   [Although we failed to mention this here in the 2.3a release, the prologue
   alternatives were experimental, and they were rewritten in future versions.]
 
   [Although we failed to mention this here in the 2.3a release, the prologue
   alternatives were experimental, and they were rewritten in future versions.]
 

-* The option `--report=look-ahead' has been changed to `--report=lookahead'.
+** The option `--report=look-ahead' has been changed to `--report=lookahead'.

   The old spelling still works, but is not documented and may be removed
   in a future release.
 
   The old spelling still works, but is not documented and may be removed
   in a future release.
 

-Changes in version 2.3, 2006-06-05:
+* Changes in version 2.3, 2006-06-05:

 
 

-* GLR grammars should now use `YYRECOVERING ()' instead of `YYRECOVERING',
+** GLR grammars should now use `YYRECOVERING ()' instead of `YYRECOVERING',

   for compatibility with LALR(1) grammars.
 
   for compatibility with LALR(1) grammars.
 

-* It is now documented that any definition of YYSTYPE or YYLTYPE should
+** It is now documented that any definition of YYSTYPE or YYLTYPE should

   be to a type name that does not contain parentheses or brackets.
 
   be to a type name that does not contain parentheses or brackets.
 

-Changes in version 2.2, 2006-05-19:
+* Changes in version 2.2, 2006-05-19:

 
 

-* The distribution terms for all Bison-generated parsers now permit
+** The distribution terms for all Bison-generated parsers now permit

   using the parsers in nonfree programs.  Previously, this permission
   was granted only for Bison-generated LALR(1) parsers in C.
 
   using the parsers in nonfree programs.  Previously, this permission
   was granted only for Bison-generated LALR(1) parsers in C.
 

-* %name-prefix changes the namespace name in C++ outputs.
+** %name-prefix changes the namespace name in C++ outputs.

 
 

-* The C++ parsers export their token_type.
+** The C++ parsers export their token_type.

 
 

-* Bison now allows multiple %union declarations, and concatenates
+** Bison now allows multiple %union declarations, and concatenates

   their contents together.
 
   their contents together.
 

-* New warning: unused values
+** New warning: unused values

   Right-hand side symbols whose values are not used are reported,
   if the symbols have destructors.  For instance:
 
   Right-hand side symbols whose values are not used are reported,
   if the symbols have destructors.  For instance:
 


@@ -327,26 +381,26 @@ Changes in version 2.2, 2006-05-19:
   The warning is intended to help catching lost values and memory leaks.
   If a value is ignored, its associated memory typically is not reclaimed.
 
   The warning is intended to help catching lost values and memory leaks.
   If a value is ignored, its associated memory typically is not reclaimed.
 

-* %destructor vs. YYABORT, YYACCEPT, and YYERROR.
+** %destructor vs. YYABORT, YYACCEPT, and YYERROR.

   Destructors are now called when user code invokes YYABORT, YYACCEPT,
   and YYERROR, for all objects on the stack, other than objects
   corresponding to the right-hand side of the current rule.
 
   Destructors are now called when user code invokes YYABORT, YYACCEPT,
   and YYERROR, for all objects on the stack, other than objects
   corresponding to the right-hand side of the current rule.
 

-* %expect, %expect-rr
+** %expect, %expect-rr

   Incorrect numbers of expected conflicts are now actual errors,
   instead of warnings.
 
   Incorrect numbers of expected conflicts are now actual errors,
   instead of warnings.
 

-* GLR, YACC parsers.
+** GLR, YACC parsers.

   The %parse-params are available in the destructors (and the
   experimental printers) as per the documentation.
 
   The %parse-params are available in the destructors (and the
   experimental printers) as per the documentation.
 

-* Bison now warns if it finds a stray `$' or `@' in an action.
+** Bison now warns if it finds a stray `$' or `@' in an action.

 
 

-* %require "VERSION"
+** %require "VERSION"

   This specifies that the grammar file depends on features implemented
   in Bison version VERSION or higher.
 
   This specifies that the grammar file depends on features implemented
   in Bison version VERSION or higher.
 

-* lalr1.cc: The token and value types are now class members.
+** lalr1.cc: The token and value types are now class members.

   The tokens were defined as free form enums and cpp macros.  YYSTYPE
   was defined as a free form union.  They are now class members:
   tokens are enumerations of the `yy::parser::token' struct, and the
   The tokens were defined as free form enums and cpp macros.  YYSTYPE
   was defined as a free form union.  They are now class members:
   tokens are enumerations of the `yy::parser::token' struct, and the


@@ -360,37 +414,37 @@ Changes in version 2.2, 2006-05-19:
   If you wish to update, then make sure older version of Bison will
   fail using `%require "2.2"'.
 
   If you wish to update, then make sure older version of Bison will
   fail using `%require "2.2"'.
 

-* DJGPP support added.
+** DJGPP support added.

 \f
 \f

-Changes in version 2.1, 2005-09-16:
+* Changes in version 2.1, 2005-09-16:

 
 

-* The C++ lalr1.cc skeleton supports %lex-param.
+** The C++ lalr1.cc skeleton supports %lex-param.

 
 

-* Bison-generated parsers now support the translation of diagnostics like
+** Bison-generated parsers now support the translation of diagnostics like

   "syntax error" into languages other than English.  The default
   language is still English.  For details, please see the new
   Internationalization section of the Bison manual.  Software
   distributors should also see the new PACKAGING file.  Thanks to
   Bruno Haible for this new feature.
 
   "syntax error" into languages other than English.  The default
   language is still English.  For details, please see the new
   Internationalization section of the Bison manual.  Software
   distributors should also see the new PACKAGING file.  Thanks to
   Bruno Haible for this new feature.
 

-* Wording in the Bison-generated parsers has been changed slightly to
+** Wording in the Bison-generated parsers has been changed slightly to

   simplify translation.  In particular, the message "memory exhausted"
   has replaced "parser stack overflow", as the old message was not
   always accurate for modern Bison-generated parsers.
 
   simplify translation.  In particular, the message "memory exhausted"
   has replaced "parser stack overflow", as the old message was not
   always accurate for modern Bison-generated parsers.
 

-* Destructors are now called when the parser aborts, for all symbols left
+** Destructors are now called when the parser aborts, for all symbols left

   behind on the stack.  Also, the start symbol is now destroyed after a
   successful parse.  In both cases, the behavior was formerly inconsistent.
 
   behind on the stack.  Also, the start symbol is now destroyed after a
   successful parse.  In both cases, the behavior was formerly inconsistent.
 

-* When generating verbose diagnostics, Bison-generated parsers no longer
+** When generating verbose diagnostics, Bison-generated parsers no longer

   quote the literal strings associated with tokens.  For example, for
   a syntax error associated with '%token NUM "number"' they might
   print 'syntax error, unexpected number' instead of 'syntax error,
   unexpected "number"'.
 \f
   quote the literal strings associated with tokens.  For example, for
   a syntax error associated with '%token NUM "number"' they might
   print 'syntax error, unexpected number' instead of 'syntax error,
   unexpected "number"'.
 \f

-Changes in version 2.0, 2004-12-25:
+* Changes in version 2.0, 2004-12-25:

 
 

-* Possibly-incompatible changes
+** Possibly-incompatible changes

 
   - Bison-generated parsers no longer default to using the alloca function
     (when available) to extend the parser stack, due to widespread
 
   - Bison-generated parsers no longer default to using the alloca function
     (when available) to extend the parser stack, due to widespread


@@ -415,7 +469,7 @@ Changes in version 2.0, 2004-12-25:
 
   - NUL bytes are no longer allowed in Bison string literals, unfortunately.
 
 
   - NUL bytes are no longer allowed in Bison string literals, unfortunately.
 

-* New features
+** New features

 
   - GLR grammars now support locations.
 
 
   - GLR grammars now support locations.
 


@@ -437,7 +491,7 @@ Changes in version 2.0, 2004-12-25:
   - New configure option --disable-yacc, to disable installation of the
     yacc command and -ly library introduced in 1.875 for POSIX conformance.
 
   - New configure option --disable-yacc, to disable installation of the
     yacc command and -ly library introduced in 1.875 for POSIX conformance.
 

-* Bug fixes
+** Bug fixes

 
   - For now, %expect-count violations are now just warnings, not errors.
     This is for compatibility with Bison 1.75 and earlier (when there are
 
   - For now, %expect-count violations are now just warnings, not errors.
     This is for compatibility with Bison 1.75 and earlier (when there are


@@ -451,12 +505,12 @@ Changes in version 2.0, 2004-12-25:
 
   - Semicolons are now allowed before "|" in grammar rules, as POSIX requires.
 \f
 
   - Semicolons are now allowed before "|" in grammar rules, as POSIX requires.
 \f

-Changes in version 1.875, 2003-01-01:
+* Changes in version 1.875, 2003-01-01:

 
 

-* The documentation license has been upgraded to version 1.2
+** The documentation license has been upgraded to version 1.2

   of the GNU Free Documentation License.
 
   of the GNU Free Documentation License.
 

-* syntax error processing
+** syntax error processing

 
   - In Yacc-style parsers YYLLOC_DEFAULT is now used to compute error
     locations too.  This fixes bugs in error-location computation.
 
   - In Yacc-style parsers YYLLOC_DEFAULT is now used to compute error
     locations too.  This fixes bugs in error-location computation.


@@ -471,7 +525,7 @@ Changes in version 1.875, 2003-01-01:
   - #defining yyerror to steal internal variables is discouraged.
     It is not guaranteed to work forever.
 
   - #defining yyerror to steal internal variables is discouraged.
     It is not guaranteed to work forever.
 

-* POSIX conformance
+** POSIX conformance

 
   - Semicolons are once again optional at the end of grammar rules.
     This reverts to the behavior of Bison 1.33 and earlier, and improves
 
   - Semicolons are once again optional at the end of grammar rules.
     This reverts to the behavior of Bison 1.33 and earlier, and improves


@@ -504,7 +558,7 @@ Changes in version 1.875, 2003-01-01:
     using typedef instead of defining it as a macro.
     For consistency, YYLTYPE is also declared instead of defined.
 
     using typedef instead of defining it as a macro.
     For consistency, YYLTYPE is also declared instead of defined.
 

-* Other compatibility issues
+** Other compatibility issues

 
   - %union directives can now have a tag before the `{', e.g., the
     directive `%union foo {...}' now generates the C code
 
   - %union directives can now have a tag before the `{', e.g., the
     directive `%union foo {...}' now generates the C code


@@ -523,7 +577,7 @@ Changes in version 1.875, 2003-01-01:
     typedefs or tags; they are no longer documented and are planned to be
     withdrawn in a future release.
 
     typedefs or tags; they are no longer documented and are planned to be
     withdrawn in a future release.
 

-* GLR parser notes
+** GLR parser notes

 
   - GLR and inline
     Users of Bison have to decide how they handle the portability of the
 
   - GLR and inline
     Users of Bison have to decide how they handle the portability of the


@@ -532,32 +586,32 @@ Changes in version 1.875, 2003-01-01:
   - `parsing stack overflow...' -> `parser stack overflow'
     GLR parsers now report `parser stack overflow' as per the Bison manual.
 
   - `parsing stack overflow...' -> `parser stack overflow'
     GLR parsers now report `parser stack overflow' as per the Bison manual.
 

-* Bison now warns if it detects conflicting outputs to the same file,
+** Bison now warns if it detects conflicting outputs to the same file,

   e.g., it generates a warning for `bison -d -o foo.h foo.y' since
   that command outputs both code and header to foo.h.
 
   e.g., it generates a warning for `bison -d -o foo.h foo.y' since
   that command outputs both code and header to foo.h.
 

-* #line in output files
+** #line in output files

   - --no-line works properly.
 
   - --no-line works properly.
 

-* Bison can no longer be built by a K&R C compiler; it requires C89 or
+** Bison can no longer be built by a K&R C compiler; it requires C89 or

   later to be built.  This change originally took place a few versions
   ago, but nobody noticed until we recently asked someone to try
   building Bison with a K&R C compiler.
 \f
   later to be built.  This change originally took place a few versions
   ago, but nobody noticed until we recently asked someone to try
   building Bison with a K&R C compiler.
 \f

-Changes in version 1.75, 2002-10-14:
+* Changes in version 1.75, 2002-10-14:

 
 

-* Bison should now work on 64-bit hosts.
+** Bison should now work on 64-bit hosts.

 
 

-* Indonesian translation thanks to Tedi Heriyanto.
+** Indonesian translation thanks to Tedi Heriyanto.

 
 

-* GLR parsers
+** GLR parsers

   Fix spurious parse errors.
 
   Fix spurious parse errors.
 

-* Pure parsers
+** Pure parsers

   Some people redefine yyerror to steal yyparse' private variables.
   Reenable this trick until an official feature replaces it.
 
   Some people redefine yyerror to steal yyparse' private variables.
   Reenable this trick until an official feature replaces it.
 

-* Type Clashes
+** Type Clashes

   In agreement with POSIX and with other Yaccs, leaving a default
   action is valid when $$ is untyped, and $1 typed:
 
   In agreement with POSIX and with other Yaccs, leaving a default
   action is valid when $$ is untyped, and $1 typed:
 


@@ -567,7 +621,7 @@ Changes in version 1.75, 2002-10-14:
 
        typed: ... untyped;
 
 
        typed: ... untyped;
 

-* Values of mid-rule actions
+** Values of mid-rule actions

   The following code:
 
        foo: { ... } { $$ = $1; } ...
   The following code:
 
        foo: { ... } { $$ = $1; } ...


@@ -575,9 +629,9 @@ Changes in version 1.75, 2002-10-14:
   was incorrectly rejected: $1 is defined in the second mid-rule
   action, and is equal to the $$ of the first mid-rule action.
 \f
   was incorrectly rejected: $1 is defined in the second mid-rule
   action, and is equal to the $$ of the first mid-rule action.
 \f

-Changes in version 1.50, 2002-10-04:
+* Changes in version 1.50, 2002-10-04:

 
 

-* GLR parsing
+** GLR parsing

   The declaration
      %glr-parser
   causes Bison to produce a Generalized LR (GLR) parser, capable of handling
   The declaration
      %glr-parser
   causes Bison to produce a Generalized LR (GLR) parser, capable of handling


@@ -588,33 +642,33 @@ Changes in version 1.50, 2002-10-04:
   Unfortunately Bison 1.50 does not work properly on 64-bit hosts
   like the Alpha, so please stick to 32-bit hosts for now.
 
   Unfortunately Bison 1.50 does not work properly on 64-bit hosts
   like the Alpha, so please stick to 32-bit hosts for now.
 

-* Output Directory
+** Output Directory

   When not in Yacc compatibility mode, when the output file was not
   specified, running `bison foo/bar.y' created `foo/bar.c'.  It
   now creates `bar.c'.
 
   When not in Yacc compatibility mode, when the output file was not
   specified, running `bison foo/bar.y' created `foo/bar.c'.  It
   now creates `bar.c'.
 

-* Undefined token
+** Undefined token

   The undefined token was systematically mapped to 2 which prevented
   the use of 2 by the user.  This is no longer the case.
 
   The undefined token was systematically mapped to 2 which prevented
   the use of 2 by the user.  This is no longer the case.
 

-* Unknown token numbers
+** Unknown token numbers

   If yylex returned an out of range value, yyparse could die.  This is
   no longer the case.
 
   If yylex returned an out of range value, yyparse could die.  This is
   no longer the case.
 

-* Error token
+** Error token

   According to POSIX, the error token must be 256.
   Bison extends this requirement by making it a preference: *if* the
   user specified that one of her tokens is numbered 256, then error
   will be mapped onto another number.
 
   According to POSIX, the error token must be 256.
   Bison extends this requirement by making it a preference: *if* the
   user specified that one of her tokens is numbered 256, then error
   will be mapped onto another number.
 

-* Verbose error messages
+** Verbose error messages

   They no longer report `..., expecting error or...' for states where
   error recovery is possible.
 
   They no longer report `..., expecting error or...' for states where
   error recovery is possible.
 

-* End token
+** End token

   Defaults to `$end' instead of `$'.
 
   Defaults to `$end' instead of `$'.
 

-* Error recovery now conforms to documentation and to POSIX
+** Error recovery now conforms to documentation and to POSIX

   When a Bison-generated parser encounters a syntax error, it now pops
   the stack until it finds a state that allows shifting the error
   token.  Formerly, it popped the stack until it found a state that
   When a Bison-generated parser encounters a syntax error, it now pops
   the stack until it finds a state that allows shifting the error
   token.  Formerly, it popped the stack until it found a state that


@@ -624,32 +678,32 @@ Changes in version 1.50, 2002-10-04:
   Paul Eggert, "Reductions during Bison error handling" (2002-05-20)
   <http://lists.gnu.org/archive/html/bug-bison/2002-05/msg00038.html>.
 
   Paul Eggert, "Reductions during Bison error handling" (2002-05-20)
   <http://lists.gnu.org/archive/html/bug-bison/2002-05/msg00038.html>.
 

-* Traces
+** Traces

   Popped tokens and nonterminals are now reported.
 
   Popped tokens and nonterminals are now reported.
 

-* Larger grammars
+** Larger grammars

   Larger grammars are now supported (larger token numbers, larger grammar
   size (= sum of the LHS and RHS lengths), larger LALR tables).
   Formerly, many of these numbers ran afoul of 16-bit limits;
   now these limits are 32 bits on most hosts.
 
   Larger grammars are now supported (larger token numbers, larger grammar
   size (= sum of the LHS and RHS lengths), larger LALR tables).
   Formerly, many of these numbers ran afoul of 16-bit limits;
   now these limits are 32 bits on most hosts.
 

-* Explicit initial rule
+** Explicit initial rule

   Bison used to play hacks with the initial rule, which the user does
   not write.  It is now explicit, and visible in the reports and
   graphs as rule 0.
 
   Bison used to play hacks with the initial rule, which the user does
   not write.  It is now explicit, and visible in the reports and
   graphs as rule 0.
 

-* Useless rules
+** Useless rules

   Before, Bison reported the useless rules, but, although not used,
   included them in the parsers.  They are now actually removed.
 
   Before, Bison reported the useless rules, but, although not used,
   included them in the parsers.  They are now actually removed.
 

-* Useless rules, useless nonterminals
+** Useless rules, useless nonterminals

   They are now reported, as a warning, with their locations.
 
   They are now reported, as a warning, with their locations.
 

-* Rules never reduced
+** Rules never reduced

   Rules that can never be reduced because of conflicts are now
   reported.
 
   Rules that can never be reduced because of conflicts are now
   reported.
 

-* Incorrect `Token not used'
+** Incorrect `Token not used'

   On a grammar such as
 
            %token useless useful
   On a grammar such as
 
            %token useless useful


@@ -659,16 +713,16 @@ Changes in version 1.50, 2002-10-04:
   where a token was used to set the precedence of the last rule,
   bison reported both `useful' and `useless' as useless tokens.
 
   where a token was used to set the precedence of the last rule,
   bison reported both `useful' and `useless' as useless tokens.
 

-* Revert the C++ namespace changes introduced in 1.31
+** Revert the C++ namespace changes introduced in 1.31

   as they caused too many portability hassles.
 
   as they caused too many portability hassles.
 

-* Default locations
+** Default locations

   By an accident of design, the default computation of @$ was
   performed after another default computation was performed: @$ = @1.
   The latter is now removed: YYLLOC_DEFAULT is fully responsible of
   the computation of @$.
 
   By an accident of design, the default computation of @$ was
   performed after another default computation was performed: @$ = @1.
   The latter is now removed: YYLLOC_DEFAULT is fully responsible of
   the computation of @$.
 

-* Token end-of-file
+** Token end-of-file

   The token end of file may be specified by the user, in which case,
   the user symbol is used in the reports, the graphs, and the verbose
   error messages instead of `$end', which remains being the default.
   The token end of file may be specified by the user, in which case,
   the user symbol is used in the reports, the graphs, and the verbose
   error messages instead of `$end', which remains being the default.


@@ -677,22 +731,22 @@ Changes in version 1.50, 2002-10-04:
   or
      %token MYEOF 0 "end of file"
 
   or
      %token MYEOF 0 "end of file"
 

-* Semantic parser
+** Semantic parser

   This old option, which has been broken for ages, is removed.
 
   This old option, which has been broken for ages, is removed.
 

-* New translations
+** New translations

   Brazilian Portuguese, thanks to Alexandre Folle de Menezes.
   Croatian, thanks to Denis Lackovic.
 
   Brazilian Portuguese, thanks to Alexandre Folle de Menezes.
   Croatian, thanks to Denis Lackovic.
 

-* Incorrect token definitions
+** Incorrect token definitions

   When given `%token 'a' "A"', Bison used to output `#define 'a' 65'.
 
   When given `%token 'a' "A"', Bison used to output `#define 'a' 65'.
 

-* Token definitions as enums
+** Token definitions as enums

   Tokens are output both as the traditional #define's, and, provided
   the compiler supports ANSI C or is a C++ compiler, as enums.
   This lets debuggers display names instead of integers.
 
   Tokens are output both as the traditional #define's, and, provided
   the compiler supports ANSI C or is a C++ compiler, as enums.
   This lets debuggers display names instead of integers.
 

-* Reports
+** Reports

   In addition to --verbose, bison supports --report=THINGS, which
   produces additional information:
   - itemset
   In addition to --verbose, bison supports --report=THINGS, which
   produces additional information:
   - itemset


@@ -704,7 +758,7 @@ Changes in version 1.50, 2002-10-04:
     Bison used to systematically output this information on top of
     the report.  Solved conflicts are now attached to their states.
 
     Bison used to systematically output this information on top of
     the report.  Solved conflicts are now attached to their states.
 

-* Type clashes
+** Type clashes

   Previous versions don't complain when there is a type clash on
   the default action if the rule has a mid-rule action, such as in:
 
   Previous versions don't complain when there is a type clash on
   the default action if the rule has a mid-rule action, such as in:
 


@@ -714,11 +768,11 @@ Changes in version 1.50, 2002-10-04:
 
   This is fixed.
 
 
   This is fixed.
 

-* GNU M4 is now required when using Bison.
+** GNU M4 is now required when using Bison.

 \f
 \f

-Changes in version 1.35, 2002-03-25:
+* Changes in version 1.35, 2002-03-25:

 
 

-* C Skeleton
+** C Skeleton

   Some projects use Bison's C parser with C++ compilers, and define
   YYSTYPE as a class.  The recent adjustment of C parsers for data
   alignment and 64 bit architectures made this impossible.
   Some projects use Bison's C parser with C++ compilers, and define
   YYSTYPE as a class.  The recent adjustment of C parsers for data
   alignment and 64 bit architectures made this impossible.


@@ -731,234 +785,234 @@ Changes in version 1.35, 2002-03-25:
   This kludge also addresses some C++ problems when the stack was
   extended.
 \f
   This kludge also addresses some C++ problems when the stack was
   extended.
 \f

-Changes in version 1.34, 2002-03-12:
+* Changes in version 1.34, 2002-03-12:

 
 

-* File name clashes are detected
+** File name clashes are detected

   $ bison foo.y -d -o foo.x
   fatal error: header and parser would both be named `foo.x'
 
   $ bison foo.y -d -o foo.x
   fatal error: header and parser would both be named `foo.x'
 

-* A missing `;' at the end of a rule triggers a warning
+** A missing `;' at the end of a rule triggers a warning

   In accordance with POSIX, and in agreement with other
   Yacc implementations, Bison will mandate this semicolon in the near
   future.  This eases the implementation of a Bison parser of Bison
   grammars by making this grammar LALR(1) instead of LR(2).  To
   facilitate the transition, this release introduces a warning.
 
   In accordance with POSIX, and in agreement with other
   Yacc implementations, Bison will mandate this semicolon in the near
   future.  This eases the implementation of a Bison parser of Bison
   grammars by making this grammar LALR(1) instead of LR(2).  To
   facilitate the transition, this release introduces a warning.
 

-* Revert the C++ namespace changes introduced in 1.31, as they caused too
+** Revert the C++ namespace changes introduced in 1.31, as they caused too

   many portability hassles.
 
   many portability hassles.
 

-* DJGPP support added.
+** DJGPP support added.

 
 

-* Fix test suite portability problems.
+** Fix test suite portability problems.

 \f
 \f

-Changes in version 1.33, 2002-02-07:
+* Changes in version 1.33, 2002-02-07:

 
 

-* Fix C++ issues
+** Fix C++ issues

   Groff could not be compiled for the definition of size_t was lacking
   under some conditions.
 
   Groff could not be compiled for the definition of size_t was lacking
   under some conditions.
 

-* Catch invalid @n
+** Catch invalid @n

   As is done with $n.
 \f
   As is done with $n.
 \f

-Changes in version 1.32, 2002-01-23:
+* Changes in version 1.32, 2002-01-23:

 
 

-* Fix Yacc output file names
+** Fix Yacc output file names

 
 

-* Portability fixes
+** Portability fixes

 
 

-* Italian, Dutch translations
+** Italian, Dutch translations

 \f
 \f

-Changes in version 1.31, 2002-01-14:
+* Changes in version 1.31, 2002-01-14:

 
 

-* Many Bug Fixes
+** Many Bug Fixes

 
 

-* GNU Gettext and %expect
+** GNU Gettext and %expect

   GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
   Bison dies on incorrect %expectations, we fear there will be
   too many bug reports for Gettext, so _for the time being_, %expect
   does not trigger an error when the input file is named `plural.y'.
 
   GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
   Bison dies on incorrect %expectations, we fear there will be
   too many bug reports for Gettext, so _for the time being_, %expect
   does not trigger an error when the input file is named `plural.y'.
 

-* Use of alloca in parsers
+** Use of alloca in parsers

   If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
   malloc exclusively.  Since 1.29, but was not NEWS'ed.
 
   alloca is used only when compiled with GCC, to avoid portability
   problems as on AIX.
 
   If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
   malloc exclusively.  Since 1.29, but was not NEWS'ed.
 
   alloca is used only when compiled with GCC, to avoid portability
   problems as on AIX.
 

-* yyparse now returns 2 if memory is exhausted; formerly it dumped core.
+** yyparse now returns 2 if memory is exhausted; formerly it dumped core.

 
 

-* When the generated parser lacks debugging code, YYDEBUG is now 0
+** When the generated parser lacks debugging code, YYDEBUG is now 0

   (as POSIX requires) instead of being undefined.
 
   (as POSIX requires) instead of being undefined.
 

-* User Actions
+** User Actions

   Bison has always permitted actions such as { $$ = $1 }: it adds the
   ending semicolon.  Now if in Yacc compatibility mode, the semicolon
   is no longer output: one has to write { $$ = $1; }.
 
   Bison has always permitted actions such as { $$ = $1 }: it adds the
   ending semicolon.  Now if in Yacc compatibility mode, the semicolon
   is no longer output: one has to write { $$ = $1; }.
 

-* Better C++ compliance
+** Better C++ compliance

   The output parsers try to respect C++ namespaces.
   [This turned out to be a failed experiment, and it was reverted later.]
 
   The output parsers try to respect C++ namespaces.
   [This turned out to be a failed experiment, and it was reverted later.]
 

-* Reduced Grammars
+** Reduced Grammars

   Fixed bugs when reporting useless nonterminals.
 
   Fixed bugs when reporting useless nonterminals.
 

-* 64 bit hosts
+** 64 bit hosts

   The parsers work properly on 64 bit hosts.
 
   The parsers work properly on 64 bit hosts.
 

-* Error messages
+** Error messages

   Some calls to strerror resulted in scrambled or missing error messages.
 
   Some calls to strerror resulted in scrambled or missing error messages.
 

-* %expect
+** %expect

   When the number of shift/reduce conflicts is correct, don't issue
   any warning.
 
   When the number of shift/reduce conflicts is correct, don't issue
   any warning.
 

-* The verbose report includes the rule line numbers.
+** The verbose report includes the rule line numbers.

 
 

-* Rule line numbers are fixed in traces.
+** Rule line numbers are fixed in traces.

 
 

-* Swedish translation
+** Swedish translation

 
 

-* Parse errors
+** Parse errors

   Verbose parse error messages from the parsers are better looking.
   Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
      Now: parse error: unexpected '/', expecting "number" or '-' or '('
 
   Verbose parse error messages from the parsers are better looking.
   Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
      Now: parse error: unexpected '/', expecting "number" or '-' or '('
 

-* Fixed parser memory leaks.
+** Fixed parser memory leaks.

   When the generated parser was using malloc to extend its stacks, the
   previous allocations were not freed.
 
   When the generated parser was using malloc to extend its stacks, the
   previous allocations were not freed.
 

-* Fixed verbose output file.
+** Fixed verbose output file.

   Some newlines were missing.
   Some conflicts in state descriptions were missing.
 
   Some newlines were missing.
   Some conflicts in state descriptions were missing.
 

-* Fixed conflict report.
+** Fixed conflict report.

   Option -v was needed to get the result.
 
   Option -v was needed to get the result.
 

-* %expect
+** %expect

   Was not used.
   Mismatches are errors, not warnings.
 
   Was not used.
   Mismatches are errors, not warnings.
 

-* Fixed incorrect processing of some invalid input.
+** Fixed incorrect processing of some invalid input.

 
 

-* Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.
+** Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.

 
 

-* Fixed some typos in the documentation.
+** Fixed some typos in the documentation.

 
 

-* %token MY_EOF 0 is supported.
+** %token MY_EOF 0 is supported.

   Before, MY_EOF was silently renumbered as 257.
 
   Before, MY_EOF was silently renumbered as 257.
 

-* doc/refcard.tex is updated.
+** doc/refcard.tex is updated.

 
 

-* %output, %file-prefix, %name-prefix.
+** %output, %file-prefix, %name-prefix.

   New.
 
   New.
 

-* --output
+** --output

   New, aliasing `--output-file'.
 \f
   New, aliasing `--output-file'.
 \f

-Changes in version 1.30, 2001-10-26:
+* Changes in version 1.30, 2001-10-26:

 
 

-* `--defines' and `--graph' have now an optional argument which is the
+** `--defines' and `--graph' have now an optional argument which is the

   output file name. `-d' and `-g' do not change; they do not take any
   argument.
 
   output file name. `-d' and `-g' do not change; they do not take any
   argument.
 

-* `%source_extension' and `%header_extension' are removed, failed
+** `%source_extension' and `%header_extension' are removed, failed

   experiment.
 
   experiment.
 

-* Portability fixes.
+** Portability fixes.

 \f
 \f

-Changes in version 1.29, 2001-09-07:
+* Changes in version 1.29, 2001-09-07:

 
 

-* The output file does not define const, as this caused problems when used
+** The output file does not define const, as this caused problems when used

   with common autoconfiguration schemes.  If you still use ancient compilers
   that lack const, compile with the equivalent of the C compiler option
   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
 
   with common autoconfiguration schemes.  If you still use ancient compilers
   that lack const, compile with the equivalent of the C compiler option
   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
 

-* Added `-g' and `--graph'.
+** Added `-g' and `--graph'.

 
 

-* The Bison manual is now distributed under the terms of the GNU FDL.
+** The Bison manual is now distributed under the terms of the GNU FDL.

 
 

-* The input and the output files has automatically a similar extension.
+** The input and the output files has automatically a similar extension.

 
 

-* Russian translation added.
+** Russian translation added.

 
 

-* NLS support updated; should hopefully be less troublesome.
+** NLS support updated; should hopefully be less troublesome.

 
 

-* Added the old Bison reference card.
+** Added the old Bison reference card.

 
 

-* Added `--locations' and `%locations'.
+** Added `--locations' and `%locations'.

 
 

-* Added `-S' and `--skeleton'.
+** Added `-S' and `--skeleton'.

 
 

-* `%raw', `-r', `--raw' is disabled.
+** `%raw', `-r', `--raw' is disabled.

 
 

-* Special characters are escaped when output.  This solves the problems
+** Special characters are escaped when output.  This solves the problems

   of the #line lines with path names including backslashes.
 
   of the #line lines with path names including backslashes.
 

-* New directives.
+** New directives.

   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
   `%debug', `%source_extension' and `%header_extension'.
 
   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
   `%debug', `%source_extension' and `%header_extension'.
 

-* @$
+** @$

   Automatic location tracking.
 \f
   Automatic location tracking.
 \f

-Changes in version 1.28, 1999-07-06:
+* Changes in version 1.28, 1999-07-06:

 
 

-* Should compile better now with K&R compilers.
+** Should compile better now with K&R compilers.

 
 

-* Added NLS.
+** Added NLS.

 
 

-* Fixed a problem with escaping the double quote character.
+** Fixed a problem with escaping the double quote character.

 
 

-* There is now a FAQ.
+** There is now a FAQ.

 \f
 \f

-Changes in version 1.27:
+* Changes in version 1.27:

 
 

-* The make rule which prevented bison.simple from being created on
+** The make rule which prevented bison.simple from being created on

   some systems has been fixed.
 \f
   some systems has been fixed.
 \f

-Changes in version 1.26:
+* Changes in version 1.26:

 
 

-* Bison now uses automake.
+** Bison now uses automake.

 
 

-* New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
+** New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.

 
 

-* Token numbers now start at 257 as previously documented, not 258.
+** Token numbers now start at 257 as previously documented, not 258.

 
 

-* Bison honors the TMPDIR environment variable.
+** Bison honors the TMPDIR environment variable.

 
 

-* A couple of buffer overruns have been fixed.
+** A couple of buffer overruns have been fixed.

 
 

-* Problems when closing files should now be reported.
+** Problems when closing files should now be reported.

 
 

-* Generated parsers should now work even on operating systems which do
+** Generated parsers should now work even on operating systems which do

   not provide alloca().
 \f
   not provide alloca().
 \f

-Changes in version 1.25, 1995-10-16:
+* Changes in version 1.25, 1995-10-16:

 
 

-* Errors in the input grammar are not fatal; Bison keeps reading
+** Errors in the input grammar are not fatal; Bison keeps reading

 the grammar file, and reports all the errors found in it.
 
 the grammar file, and reports all the errors found in it.
 

-* Tokens can now be specified as multiple-character strings: for
+** Tokens can now be specified as multiple-character strings: for

 example, you could use "<=" for a token which looks like <=, instead
 of chosing a name like LESSEQ.
 
 example, you could use "<=" for a token which looks like <=, instead
 of chosing a name like LESSEQ.
 

-* The %token_table declaration says to write a table of tokens (names
+** The %token_table declaration says to write a table of tokens (names

 and numbers) into the parser file.  The yylex function can use this
 table to recognize multiple-character string tokens, or for other
 purposes.
 
 and numbers) into the parser file.  The yylex function can use this
 table to recognize multiple-character string tokens, or for other
 purposes.
 

-* The %no_lines declaration says not to generate any #line preprocessor
+** The %no_lines declaration says not to generate any #line preprocessor

 directives in the parser file.
 
 directives in the parser file.
 

-* The %raw declaration says to use internal Bison token numbers, not
+** The %raw declaration says to use internal Bison token numbers, not

 Yacc-compatible token numbers, when token names are defined as macros.
 
 Yacc-compatible token numbers, when token names are defined as macros.
 

-* The --no-parser option produces the parser tables without including
+** The --no-parser option produces the parser tables without including

 the parser engine; a project can now use its own parser engine.
 The actions go into a separate file called NAME.act, in the form of
 a switch statement body.
 \f
 the parser engine; a project can now use its own parser engine.
 The actions go into a separate file called NAME.act, in the form of
 a switch statement body.
 \f

-Changes in version 1.23:
+* Changes in version 1.23:

 
 The user can define YYPARSE_PARAM as the name of an argument to be
 passed into yyparse.  The argument should have type void *.  It should
 
 The user can define YYPARSE_PARAM as the name of an argument to be
 passed into yyparse.  The argument should have type void *.  It should


@@ -967,11 +1021,11 @@ by casting it to the proper pointer type.
 
 Line numbers in output file corrected.
 \f
 
 Line numbers in output file corrected.
 \f

-Changes in version 1.22:
+* Changes in version 1.22:

 
 --help option added.
 \f
 
 --help option added.
 \f

-Changes in version 1.20:
+* Changes in version 1.20:

 
 Output file does not redefine const for C++.
 
 
 Output file does not redefine const for C++.
 


@@ -982,9 +1036,9 @@ End:
 -----
 
 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
 -----
 
 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,

-2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.

 
 

-This file is part of Bison, the GNU Compiler Compiler.
+This file is part of Bison, the GNU Parser Generator.

 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by