glr.c, yacc.c: declare yydebug in the header.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 27c4974adc79a6eb54f842f8e738c743fb936675..ae8b297ced4fdeb52b2a6fe5e83ac6e22c042d80 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,47 @@
-Bison News
-----------
+GNU Bison NEWS
 
-* Changes in version 2.5.1_rc1 (2012-05-14):
+* Noteworthy changes in release ?.? (????-??-??) [?]
+
+** Future changes:
+
+  The next major release will drop support for generating parsers in K&R C,
+  and remove the definition of yystype (removal announced since Bison
+  1.875).
+
+** The generated header is included (yacc.c)
+
+  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.
+
+** Headers (yacc.c, glr.c, glr.cc)
+
+*** Guards
+
+  The generated headers are now guarded, as is already the case for C++
+  parsers (lalr1.cc).  For intance, with --defines=foo.h:
+
+  #ifndef YY_FOO_H
+  # define YY_FOO_H
+  ...
+  #endif /* !YY_FOO_H  */
+
+*** New declarations
+
+  The generated header now declares yydebug and yyparse.  Both honor
+  --name-prefix=bar_, and yield
+
+  int bar_parse (void);
+
+  rather than
+
+  #define yyparse bar_parse
+  int yyparse (void);
+
+  in order to facilitate the inclusion of several parser headers inside a
+  single compilation unit.
+
+* Noteworthy changes in release 2.5.1 (2012-06-05) [stable]
 
 ** Future changes:
 
@@ -26,12 +66,35 @@ Bison News
   The Java parser no longer throws ArrayIndexOutOfBoundsException if the
   first token leads to a syntax error.  Some minor clean ups.
 
-** C++11 compatibility:
+** Changes for C++:
+
+*** C++11 compatibility:
 
   C and C++ parsers use "nullptr" instead of "0" when __cplusplus is 201103L
   or higher.
 
-** C++ locations:
+*** Header guards
+
+  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
+
+  The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
+  case characters are converted to upper case, and series of
+  non-alphanumerical characters are converted to an underscore.
+
+  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
+
+*** C++ locations:
 
   The position and location constructors (and their initialize methods)
   accept new arguments for line and column.  Several issues in the
@@ -70,7 +133,7 @@ Bison News
   This includes warnings with some compilers, unexpected behavior of tools
   such as diff, warning messages from the test suite itself, etc.
 
-*** The install-pdf target work properly:
+*** The install-pdf target works properly:
 
   Running "make install-pdf" (or -dvi, -html, -info, and -ps) no longer
   halts in the middle of its course.