%param.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 3d5a561b09ecfb3af4603ca88a3b314aa8f0e903..e9a5dae013b7af772d6a1281310314c8a0202862 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -25,6 +25,17 @@ Bison News
   use these prefixed token names, although the grammar itself still
   uses the short names (as in the sample rule given above).
 
   use these prefixed token names, although the grammar itself still
   uses the short names (as in the sample rule given above).
 

+** Variable api.namespace
+
+  The "namespace" variable is renamed "api.namespace".  Backward
+  compatibility is ensured, but upgrading is recommended.
+
+** Variable parse.error
+
+  The variable error controls the verbosity of error messages.  The
+  use of the %error-verbose directive is deprecated in favor of
+  %define parse.error "verbose".
+

 * Changes in version 2.5 (????-??-??):
 
 ** IELR(1) and Canonical LR(1) Support
 * Changes in version 2.5 (????-??-??):
 
 ** IELR(1) and Canonical LR(1) Support


@@ -44,9 +55,9 @@ Bison News
   default.  You can specify the type of parser tables in the grammar
   file with these directives:
 
   default.  You can specify the type of parser tables in the grammar
   file with these directives:
 

-    %define lr.type "LALR"
-    %define lr.type "IELR"
-    %define lr.type "canonical LR"
+    %define lr.type lalr
+    %define lr.type ielr
+    %define lr.type canonical-lr

 
   The default reduction optimization in the parser tables can also be
   adjusted using `%define lr.default-reductions'.  See the documentation
 
   The default reduction optimization in the parser tables can also be
   adjusted using `%define lr.default-reductions'.  See the documentation


@@ -57,7 +68,15 @@ Bison News
   These features are experimental.  More user feedback will help to
   stabilize them.
 
   These features are experimental.  More user feedback will help to
   stabilize them.
 

-** %define can now be invoked via the command line.
+** Unrecognized %code qualifiers are now an error not a warning.
+
+** %define improvements.
+
+*** Unrecognized variables are now an error not a warning.
+
+*** Multiple invocations for any variable is now an error not a warning.
+
+*** Can now be invoked via the command line.

 
   Each of these command-line options
 
 
   Each of these command-line options
 


@@ -76,7 +95,7 @@ Bison News
   quietly override %define, but -D and --define do not.  For further
   details, see the section "Bison Options" in the Bison manual.
 
   quietly override %define, but -D and --define do not.  For further
   details, see the section "Bison Options" in the Bison manual.
 

-** %define variables renamed.
+*** Variables renamed.

 
   The following %define variables
 
 
   The following %define variables
 


@@ -91,7 +110,18 @@ Bison News
   The old names are now deprecated but will be maintained indefinitely
   for backward compatibility.
 
   The old names are now deprecated but will be maintained indefinitely
   for backward compatibility.
 

-** Symbols names
+*** Values no longer need to be quoted in grammar file.
+
+  If a %define value is an identifier, it no longer needs to be placed
+  within quotations marks.  For example,
+
+    %define api.push-pull "push"
+
+  can be rewritten as
+
+    %define api.push-pull push
+
+** Symbol names.

 
   Consistently with directives (such as %error-verbose) and variables
   (e.g. push-pull), symbol names may include dashes in any position,
 
   Consistently with directives (such as %error-verbose) and variables
   (e.g. push-pull), symbol names may include dashes in any position,


@@ -120,8 +150,32 @@ Bison News
   about a missing semicolon where it did not before.  Future releases of
   Bison will cease to append semicolons entirely.
 
   about a missing semicolon where it did not before.  Future releases of
   Bison will cease to append semicolons entirely.
 

+** Character literals not of length one.
+
+  Previously, Bison quietly converted all character literals to length
+  one.  For example, without warning, Bison interpreted the operators in
+  the following grammar to be the same token:
+
+    exp: exp '++'
+       | exp '+' exp
+       ;
+
+  Bison now warns when a character literal is not of length one.  In
+  some future release, Bison will report an error instead.
+
+** Verbose error messages fixed for nonassociative tokens.
+
+  When %error-verbose is specified, syntax error messages produced by
+  the generated parser include the unexpected token as well as a list of
+  expected tokens.  Previously, this list erroneously included tokens
+  that would actually induce a syntax error because conflicts for them
+  were resolved with %nonassoc.  Such tokens are now properly omitted
+  from the list.
+

 * Changes in version 2.4.2 (????-??-??):
 
 * Changes in version 2.4.2 (????-??-??):
 

+** Detection of GNU M4 1.4.6 or newer during configure is improved.
+

 ** %code is now a permanent feature.
 
   A traditional Yacc prologue directive is written in the form:
 ** %code is now a permanent feature.
 
   A traditional Yacc prologue directive is written in the form:


@@ -145,6 +199,12 @@ Bison News
   Bison's Java feature as a whole including its current usage of %code
   is still considered experimental.
 
   Bison's Java feature as a whole including its current usage of %code
   is still considered experimental.
 

+** Internationalization.
+
+  Fix a regression introduced in Bison 2.4: Under some circumstances,
+  message translations were not installed although supported by the
+  host system.
+

 * Changes in version 2.4.1 (2008-12-11):
 
 ** In the GLR defines file, unexpanded M4 macros in the yylval and yylloc
 * Changes in version 2.4.1 (2008-12-11):
 
 ** In the GLR defines file, unexpanded M4 macros in the yylval and yylloc