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yacc: remove support for YYPRINT

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Its removal was annonced several times in NEWS (for Bison 3.5, 3.6, 3.7).

* data/skeletons/c.m4, data/skeletons/yacc.c: Remove support for YYPRINT.
* NEWS: Fix the mess introduced by the merge.
Document the removal of YYPRINT.
* doc/bison.texi (The YYPRINT Macro): Remove.
This commit is contained in:
Akim Demaille
2021-02-01 06:45:15 +01:00
parent 9acc9d2aee
commit 1efe31185f
7 changed files with 34 additions and 116 deletions
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53
doc/bison.texi
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@@ -472,7 +472,6 @@ Tracing Your Parser
* Enabling Traces:: Activating run-time trace support
* Mfcalc Traces:: Extending @code{mfcalc} to support traces
* The YYPRINT Macro:: Obsolete interface for semantic value reports
Invoking Bison
@@ -10892,7 +10891,6 @@ When a Bison grammar compiles properly but parses ``incorrectly'', the
@menu
* Enabling Traces:: Activating run-time trace support
* Mfcalc Traces:: Extending @code{mfcalc} to support traces
* The YYPRINT Macro:: Obsolete interface for semantic value reports
@end menu
@node Enabling Traces
@@ -11156,49 +11154,6 @@ Cleanup: popping nterm input ()
@end example
@node The YYPRINT Macro
@subsection The @code{YYPRINT} Macro
@findex YYPRINT
The @code{%printer} directive was introduced in Bison 1.50 (November 2002).
Before then, @code{YYPRINT} provided a similar feature, but only for
terminal symbols and only with the @file{yacc.c} skeleton.
@deffn {Macro} YYPRINT (@var{stream}, @var{token}, @var{value});
@findex YYPRINT
Deprecated, will be removed eventually.
If you define @code{YYPRINT}, it should take three arguments. The parser
will pass a standard I/O stream, the numeric code for the token kind, and
the token value (from @code{yylval}).
For @file{yacc.c} only. Obsoleted by @code{%printer}.
@end deffn
Here is an example of @code{YYPRINT} suitable for the multi-function
calculator (@pxref{Mfcalc Declarations}):
@example
%@{
static void print_token_value (FILE *file, int type, YYSTYPE value);
#define YYPRINT(File, Type, Value) \
print_token_value (File, Type, Value)
%@}
@dots{} %% @dots{} %% @dots{}
static void
print_token_value (FILE *file, yytoken_kind_t kind, YYSTYPE value)
@{
if (kind == VAR)
fprintf (file, "%s", value.tptr->name);
else if (kind == NUM)
fprintf (file, "%d", value.val);
@}
@end example
@xref{Mfcalc Traces}, for the proper use of @code{%printer}.
@c ================================================= Invoking Bison
@node Invocation
@@ -16018,12 +15973,6 @@ The parser function produced by Bison; call this function to start
parsing. @xref{Parser Function}.
@end deffn
@deffn {Macro} YYPRINT
Macro used to output token semantic values. For @file{yacc.c} only.
Deprecated, use @code{%printer} instead (@pxref{Printer Decl}).
@xref{The YYPRINT Macro}.
@end deffn
@deffn {Function} yypstate_delete
The function to delete a parser instance, produced by Bison in push mode;
call this function to delete the memory associated with a parser.
@@ -16465,7 +16414,7 @@ London, Department of Computer Science, TR-00-12 (December 2000).
@c LocalWords: symrec val tptr FUN func struct sym enum IEC syntaxes Byacc
@c LocalWords: fun putsym getsym arith funs atan ptr malloc sizeof Lex pcc
@c LocalWords: strlen strcpy fctn strcmp isalpha symbuf realloc isalnum DOTDOT
@c LocalWords: ptypes itype YYPRINT trigraphs yytname expseq vindex dtype Unary
@c LocalWords: ptypes itype trigraphs yytname expseq vindex dtype Unary
@c LocalWords: Rhs YYRHSLOC LE nonassoc op deffn typeless yynerrs nonterminal
@c LocalWords: yychar yydebug msg YYNTOKENS YYNNTS YYNRULES YYNSTATES reentrant
@c LocalWords: cparse clex deftypefun NE defmac YYACCEPT YYABORT param yypstate