warnings: factoring: complaints

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 286547696d24325ccfac0396d20e976f642ac563..e1373657b4993abb3e5959c197713f510e05bc75 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -113,23 +113,39 @@ GNU Bison NEWS
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 

-** Future changes:
+** Future changes
+
+  The next major release of Bison will drop support for the following
+  deprecated features.  Please report disagreements to bug-bison@gnu.org.
+
+*** K&C parsers
+
+  Support for generating parsers in K&R C will be removed.  Parsers
+  generated for C supprt ISO C90, and are tested with ISO C99 and ISO C11
+  compilers.

 
 

-  The next major release will drop support for generating parsers in K&R C,
-  and remove the definitions of yystype and yyltype (removal announced since
-  Bison 1.875).  YYPARSE_PARAM and YYLEX_PARAM, which were deprecated in
-  favor of %parse-param and %lex-param (introduced in Bison 1.875 too), will
-  no longer be supported.
+*** Features deprecated since Bison 1.875

 
 

-** The generated header is included (yacc.c)
+  The definitions of yystype and yyltype will be removed; use YYSTYPE and
+  YYLTYPE.
+
+  YYPARSE_PARAM and YYLEX_PARAM, deprecated in favor of %parse-param and
+  %lex-param, will no longer be supported.
+
+  Support for the preprocessor symbol YYERROR_VERBOSE will be removed, use
+  %error-verbose.
+
+*** The generated header will be included (yacc.c)

 
   Instead of duplicating the content of the generated header (definition of
 
   Instead of duplicating the content of the generated header (definition of

-  YYSTYPE, yyltype etc.), the generated parser now includes it, as was
-  already the case for GLR or C++ parsers.
+  YYSTYPE, yyparse declaration etc.), the generated parser will include it,
+  as is already the case for GLR or C++ parsers.  This change is deferred
+  because existing versions of ylwrap (e.g., Automake 1.12.1) do not support
+  it.

 
 

-** Headers (yacc.c, glr.c, glr.cc)
+** Headers

 
 

-*** Guards
+*** Guards (yacc.c, glr.c, glr.cc)

 
   The generated headers are now guarded, as is already the case for C++
   parsers (lalr1.cc).  For intance, with --defines=foo.h:
 
   The generated headers are now guarded, as is already the case for C++
   parsers (lalr1.cc).  For intance, with --defines=foo.h:


@@ -139,7 +155,7 @@ GNU Bison NEWS
     ...
     #endif /* !YY_FOO_H  */
 
     ...
     #endif /* !YY_FOO_H  */
 

-*** New declarations
+*** New declarations (yacc.c, glr.c)

 
   The generated header now declares yydebug and yyparse.  Both honor
   --name-prefix=bar_, and yield
 
   The generated header now declares yydebug and yyparse.  Both honor
   --name-prefix=bar_, and yield


@@ -154,6 +170,17 @@ GNU Bison NEWS
   in order to facilitate the inclusion of several parser headers inside a
   single compilation unit.
 
   in order to facilitate the inclusion of several parser headers inside a
   single compilation unit.
 

+*** Exported symbols in C++
+
+  The symbols YYTOKEN_TABLE and YYERROR_VERBOSE, which were defined in the
+  header, are removed, as they prevent the possibility of including several
+  generated headers from a single compilation unit.
+
+*** YYLSP_NEEDED
+
+  For the same reasons, the undocumented and unused macro YYLSP_NEEDED is no
+  longer defined.
+

 * Noteworthy changes in release 2.5.1 (2012-06-05) [stable]
 
 ** Future changes:
 * Noteworthy changes in release 2.5.1 (2012-06-05) [stable]
 
 ** Future changes:


@@ -191,10 +218,10 @@ GNU Bison NEWS
   The header files such as "parser.hh", "location.hh", etc. used a constant
   name for preprocessor guards, for instance:
 
   The header files such as "parser.hh", "location.hh", etc. used a constant
   name for preprocessor guards, for instance:
 

-  #ifndef BISON_LOCATION_HH
-  # define BISON_LOCATION_HH
-  ...
-  #endif // !BISON_LOCATION_HH
+    #ifndef BISON_LOCATION_HH
+    # define BISON_LOCATION_HH
+    ...
+    #endif // !BISON_LOCATION_HH

 
   The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
   case characters are converted to upper case, and series of
 
   The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
   case characters are converted to upper case, and series of


@@ -202,10 +229,10 @@ GNU Bison NEWS
 
   With "bison -o lang++/parser.cc", "location.hh" would now include:
 
 
   With "bison -o lang++/parser.cc", "location.hh" would now include:
 

-  #ifndef YY_LANG_LOCATION_HH
-  # define YY_LANG_LOCATION_HH
-  ...
-  #endif // !YY_LANG_LOCATION_HH
+    #ifndef YY_LANG_LOCATION_HH
+    # define YY_LANG_LOCATION_HH
+    ...
+    #endif // !YY_LANG_LOCATION_HH

 
 *** C++ locations:
 
 
 *** C++ locations:
 


@@ -436,33 +463,33 @@ GNU Bison NEWS
   to use it.  If, for instance, your location structure has "first"
   and "last" members, instead of
 
   to use it.  If, for instance, your location structure has "first"
   and "last" members, instead of
 

-      # define YYLLOC_DEFAULT(Current, Rhs, N)                             \
-        do                                                                 \
-          if (N)                                                           \
-            {                                                              \
-              (Current).first = (Rhs)[1].location.first;                   \
-              (Current).last  = (Rhs)[N].location.last;                    \
-            }                                                              \
-          else                                                             \
-            {                                                              \
-              (Current).first = (Current).last = (Rhs)[0].location.last;   \
-            }                                                              \
-        while (false)
+    # define YYLLOC_DEFAULT(Current, Rhs, N)                             \
+      do                                                                 \
+        if (N)                                                           \
+          {                                                              \
+            (Current).first = (Rhs)[1].location.first;                   \
+            (Current).last  = (Rhs)[N].location.last;                    \
+          }                                                              \
+        else                                                             \
+          {                                                              \
+            (Current).first = (Current).last = (Rhs)[0].location.last;   \
+          }                                                              \
+      while (false)

 
   use:
 
 
   use:
 

-      # define YYLLOC_DEFAULT(Current, Rhs, N)                             \
-        do                                                                 \
-          if (N)                                                           \
-            {                                                              \
-              (Current).first = YYRHSLOC (Rhs, 1).first;                   \
-              (Current).last  = YYRHSLOC (Rhs, N).last;                    \
-            }                                                              \
-          else                                                             \
-            {                                                              \
-              (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last;   \
-            }                                                              \
-        while (false)
+    # define YYLLOC_DEFAULT(Current, Rhs, N)                             \
+      do                                                                 \
+        if (N)                                                           \
+          {                                                              \
+            (Current).first = YYRHSLOC (Rhs, 1).first;                   \
+            (Current).last  = YYRHSLOC (Rhs, N).last;                    \
+          }                                                              \
+        else                                                             \
+          {                                                              \
+            (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last;   \
+          }                                                              \
+      while (false)

 
 ** YYLLOC_DEFAULT in C++:
 
 
 ** YYLLOC_DEFAULT in C++:
 


@@ -1462,9 +1489,9 @@ GNU Bison NEWS
 ** Incorrect "Token not used"
   On a grammar such as
 
 ** Incorrect "Token not used"
   On a grammar such as
 

-           %token useless useful
-           %%
-           exp: '0' %prec useful;
+    %token useless useful
+    %%
+    exp: '0' %prec useful;

 
   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.


@@ -1483,9 +1510,9 @@ GNU Bison NEWS
   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 MYEOF 0
+    %token MYEOF 0

   or
   or

-     %token MYEOF 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.


@@ -1521,9 +1548,9 @@ GNU Bison NEWS
   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:
 

-      %type <foo> bar
-      %%
-      bar: '0' {} '0';
+    %type <foo> bar
+    %%
+    bar: '0' {} '0';

 
   This is fixed.
 
 
   This is fixed.