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news: update

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In particular, announce lalr1.d.
This commit is contained in:
Akim Demaille
2021-08-04 06:41:06 +02:00
parent b293d4fbca
commit e814ddc92f
1 changed files with 39 additions and 21 deletions
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60
NEWS
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@@ -2,38 +2,46 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?]
** Deprecated features
It is always recommended to prefer `%define api.value.type foo` to
`#define YYSTYPE foo`. The latter is supported in C for compatibility
with Yacc, but not in C++. Warnings are now issued if `#define YYSTYPE`
is used in C++, and eventually support will be removed.
Support for the YYPRINT macro is removed. It worked only with yacc.c and
only for tokens. It was obsoleted by %printer, introduced in Bison 1.50
(November 2002).
** Changes
*** Graph output
** Backward incompatible changes
In conformance with the recommendations of the Graphviz team
(https://marc.info/?l=graphviz-devel&m=129418103126092), `-g`/`--graph`
now generates a *.gv file by default, instead of *.dot. A transition
started in Bison 3.4.
*** C++ value_type
** Deprecated features
Prefer value_type to semantic_type to denote the semantic value type,
specified by the `api.value.type` %define variable.
Support for the YYPRINT macro is removed. It worked only with yacc.c and
only for tokens. It was obsoleted by %printer, introduced in Bison 1.50
(November 2002).
*** GLR traces
It has always been recommended to prefer `%define api.value.type foo` to
`#define YYSTYPE foo`. The latter is supported in C for compatibility
with Yacc, but not in C++. Warnings are now issued if `#define YYSTYPE`
is used in C++, and eventually support will be removed.
There were no debug traces for deferred calls to user actions. They are
logged now.
In C++ code, prefer value_type to semantic_type to denote the semantic
value type, which is specified by the `api.value.type` %define variable.
** New features
*** A skeleton for the D programming language
The "lalr1.d" skeleton is now officially part of Bison.
It was originally contributed by Oliver Mangold, based on Paolo Bonzini's
lalr1.java, and was improved by H. S. Teoh. Adela Vais then took over
maintenance and invested a lot of efforts to complete, test and document
it.
It now supports all the bells and whistles of the other deterministic
parsers, which include: pull/push interfaces, verbose and custom error
messages, lookahead correction, token constructors, internationalization,
locations, printers, token and symbol prefixes, etc.
Two examples demonstrate the D parsers: a basic one (examples/d/simple),
and an advanced one (examples/d/calc).
*** Option -H, --header and directive %header
The option `-H`/`--header` supersedes the option `--defines`, and the
@@ -62,6 +70,9 @@ GNU Bison NEWS
%skeleton "glr2.cc"
It will eventually replace "glr.cc". However we need user feedback on
this skeleton. _Please_ report your results and comments about it.
*** Counterexamples
Counterexamples now show the rule numbers, and always show ε for rules
@@ -96,6 +107,11 @@ GNU Bison NEWS
Users may define `YYLOCATION_PRINT` to cover other cases.
*** GLR traces
There were no debug traces for deferred calls to user actions. They are
logged now.
* Noteworthy changes in release 3.7.6 (2021-03-08) [stable]
@@ -4668,7 +4684,7 @@ LocalWords: pragmas noreturn untyped Rozenman unexpanded Wojciech Polak
LocalWords: Alexandre MERCHANTABILITY yytype emplace ptr automove lvalues
LocalWords: nonterminal yy args Pragma dereference yyformat rhs docdir bw
LocalWords: Redeclarations rpcalc Autoconf YFLAGS Makefiles PROG DECL num
LocalWords: Heimbigner AST src ast Makefile srcdir MinGW xxlex XXSTYPE
LocalWords: Heimbigner AST src ast Makefile srcdir MinGW xxlex XXSTYPE CVE
LocalWords: XXLTYPE strictfp IDEs ffixit fdiagnostics parseable fixits
LocalWords: Wdeprecated yytext Variadic variadic yyrhs yyphrs RCS README
LocalWords: noexcept constexpr ispell american deprecations backend Teoh
@@ -4679,6 +4695,8 @@ LocalWords: symrec yypcontext TOKENMAX yyexpected YYEMPTY yypstate YYEOF
LocalWords: autocompletion bistromathic submessages Cayuela lexcalc hoc
LocalWords: yytoken YYUNDEF YYerror basename Automake's UTF ifdef ffile
LocalWords: gotos readline Imbimbo Wcounterexamples Wcex Nonunifying rcex
LocalWords: Vais xsltproc YYNOMEM YYLOCATION signedness YYBISON MITRE's
LocalWords: libreadline YYMALLOC YYFREE MSVC redefinitions
Local Variables:
ispell-dictionary: "american"