Initial revision.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 183b129f9840a835f8981a6870270e99d7b9b90d..1a1310b02b6c8b25ba4c3528bfddf5d9439d0f97 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,67 @@
 Bison News
 ----------
 
 Bison News
 ----------
 

-Changes in version 1.50a:
+Changes in version 1.75d:
+
+* Yacc library now available
+  Bison now installs a small library liby.a containing implementations
+  of Yacc-compatible yyerror and main functions.  This library is
+  normally not useful, but POSIX requires it.
+
+* %lex-param, %parse-param
+  These now take just one operand, not two.
+
+Changes in version 1.75c, 2002-11-25:
+
+* "parse error" -> "syntax error"
+  Bison now uniformly uses the term "syntax error"; formerly, the code
+  and manual sometimes used the term "parse error" instead.  POSIX
+  requires "syntax error" in diagnostics, and it was thought better to
+  be consistent.
+
+* "parsing stack overflow..." -> "parser stack overflow"
+  GLR parsers now report "parser stack overflow" as per the Bison manual.
+
+* GLR and inline
+  Users of Bison have to decide how they handle the portability of the
+  C keyword `inline'.
+
+Changes in version 1.75b, 2002-11-13:
+
+* %destructor
+  It is now possible to reclaim the memory associated to symbols
+  discarded during error recovery.  This feature is still experimental.
+
+* Bison now parses C99 lexical constructs like UCNs and
+  backslash-newline within C escape sequences, as POSIX 1003.1-2001 requires.
+
+* --no-line works properly.
+
+* %error-verbose
+  This new directive is preferred over YYERROR_VERBOSE.
+
+* %lex-param, %parse-param
+  These new directives are preferred over PARSE_PARAM and LEX_PARAM.
+  In addition, they provide a means for yyerror to remain pure, and
+  to access to the current location.
+
+  #defining yyerror to steal internal variables is strongly
+  discouraged.  It is not guaranteed to work for ever.
+
+* #line
+  Bison now recognizes #line in its input, and forwards them.
+
+* #line
+  File names are properly escaped. E.g. foo\bar.y give #line 123 "foo\\bar.y".
+
+Changes in version 1.75a, 2002-10-24:
+
+* 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.
+
+Changes in version 1.75, 2002-10-14:

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


@@ -14,6 +74,24 @@ Changes in version 1.50a:
   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
+  In agreement with POSIX and with other Yaccs, leaving a default
+  action is valid when $$ is untyped, and $1 typed:
+
+       untyped: ... typed;
+
+  but the converse remains an error:
+
+       typed: ... untyped;
+
+* Values of mid-rule actions
+  The following code:
+
+       foo: { ... } { $$ = $1; } ...
+
+  was incorrectly rejected: $1 is defined in the second mid-rule
+  action, and is equal to the $$ of the first mid-rule action.
+

 Changes in version 1.50, 2002-10-04:
 
 * GLR parsing
 Changes in version 1.50, 2002-10-04:
 
 * GLR parsing


@@ -111,9 +189,9 @@ Changes in version 1.50, 2002-10-04:
   the user symbol is used in the reports, the graphs, and the verbose
   error messages instead of `$end', which remains being the default.
   For instance
   the user symbol is used in the reports, the graphs, and the verbose
   error messages instead of `$end', which remains being the default.
   For instance

-     %token YYEOF 0
+     %token MYEOF 0

   or
   or

-     %token YYEOF 0 "end of file"
+     %token MYEOF 0 "end of file"

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


@@ -293,8 +371,8 @@ Changes in version 1.31, 2002-01-14:
 \f
 Changes in version 1.30, 2001-10-26:
 
 \f
 Changes in version 1.30, 2001-10-26:
 

-* `--defines' and `--graph' have now an optionnal argument which is the
-  output file name. `-d' and `-g' do not change, they do not take any
+* `--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.
 
 * `%source_extension' and `%header_extension' are removed, failed
   argument.
 
 * `%source_extension' and `%header_extension' are removed, failed