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Merge remote-tracking branch 'origin/maint'
* origin/maint: tests: do not output m4 set up. tests: use the generic yyerror function. tests: use assert instead of plain abort. tests: improve the generic yylex implementation. tests: generalize the compilation macros. tests: fix confusion between api.prefix and name-prefix. maint: gitignores. yacc: work around the ylwrap limitation. Conflicts: NEWS tests/local.at
This commit is contained in:
Akim Demaille
112
NEWS
112
NEWS
@@ -113,19 +113,33 @@ GNU Bison NEWS
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* Noteworthy changes in release ?.? (????-??-??) [?]
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** Future changes:
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** Future changes
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The next major release will drop support for generating parsers in K&R C,
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and remove the definitions of yystype and yyltype (removal announced since
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Bison 1.875). YYPARSE_PARAM and YYLEX_PARAM, which were deprecated in
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favor of %parse-param and %lex-param (introduced in Bison 1.875 too), will
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no longer be supported.
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The next major release of Bison will drop support for the following
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deprecated features. Please report disagreements to bug-bison@gnu.org.
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** The generated header is included (yacc.c)
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*** K&C parsers
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Support for generating parsers in K&R C will be removed. Parsers
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generated for C supprt ISO C90, and are tested with ISO C99 and ISO C11
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compilers.
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*** Deprecated features
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The definitions of yystype and yyltype will be removed, as announced since
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Bison 1.875. Use YYSTYPE and YYLTYPE only.
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YYPARSE_PARAM and YYLEX_PARAM, which were deprecated in favor of
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%parse-param and %lex-param (introduced in Bison 1.875), will no longer be
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supported.
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*** The generated header will be included (yacc.c)
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Instead of duplicating the content of the generated header (definition of
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YYSTYPE, yyltype etc.), the generated parser now includes it, as was
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already the case for GLR or C++ parsers.
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YYSTYPE, yyparse declaration etc.), the generated parser will include it,
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as is already the case for GLR or C++ parsers. This change is deferred
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because existing versions of ylwrap (e.g., Automake 1.12.1) do not support
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it.
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** Headers (yacc.c, glr.c, glr.cc)
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@@ -191,10 +205,10 @@ GNU Bison NEWS
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The header files such as "parser.hh", "location.hh", etc. used a constant
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name for preprocessor guards, for instance:
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#ifndef BISON_LOCATION_HH
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# define BISON_LOCATION_HH
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...
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#endif // !BISON_LOCATION_HH
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#ifndef BISON_LOCATION_HH
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# define BISON_LOCATION_HH
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...
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#endif // !BISON_LOCATION_HH
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The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
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case characters are converted to upper case, and series of
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@@ -202,10 +216,10 @@ GNU Bison NEWS
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With "bison -o lang++/parser.cc", "location.hh" would now include:
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#ifndef YY_LANG_LOCATION_HH
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# define YY_LANG_LOCATION_HH
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...
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#endif // !YY_LANG_LOCATION_HH
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#ifndef YY_LANG_LOCATION_HH
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# define YY_LANG_LOCATION_HH
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...
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#endif // !YY_LANG_LOCATION_HH
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*** C++ locations:
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@@ -436,33 +450,33 @@ GNU Bison NEWS
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to use it. If, for instance, your location structure has "first"
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and "last" members, instead of
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# define YYLLOC_DEFAULT(Current, Rhs, N) \
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do \
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if (N) \
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{ \
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(Current).first = (Rhs)[1].location.first; \
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(Current).last = (Rhs)[N].location.last; \
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} \
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else \
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{ \
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(Current).first = (Current).last = (Rhs)[0].location.last; \
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} \
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while (false)
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# define YYLLOC_DEFAULT(Current, Rhs, N) \
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do \
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if (N) \
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{ \
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(Current).first = (Rhs)[1].location.first; \
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(Current).last = (Rhs)[N].location.last; \
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} \
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else \
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{ \
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(Current).first = (Current).last = (Rhs)[0].location.last; \
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} \
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while (false)
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use:
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# define YYLLOC_DEFAULT(Current, Rhs, N) \
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do \
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if (N) \
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{ \
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(Current).first = YYRHSLOC (Rhs, 1).first; \
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(Current).last = YYRHSLOC (Rhs, N).last; \
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} \
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else \
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{ \
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(Current).first = (Current).last = YYRHSLOC (Rhs, 0).last; \
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} \
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while (false)
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# define YYLLOC_DEFAULT(Current, Rhs, N) \
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do \
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if (N) \
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{ \
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(Current).first = YYRHSLOC (Rhs, 1).first; \
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(Current).last = YYRHSLOC (Rhs, N).last; \
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} \
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else \
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{ \
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(Current).first = (Current).last = YYRHSLOC (Rhs, 0).last; \
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} \
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while (false)
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** YYLLOC_DEFAULT in C++:
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@@ -1462,9 +1476,9 @@ GNU Bison NEWS
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** Incorrect "Token not used"
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On a grammar such as
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%token useless useful
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%%
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exp: '0' %prec useful;
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%token useless useful
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%%
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exp: '0' %prec useful;
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where a token was used to set the precedence of the last rule,
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bison reported both "useful" and "useless" as useless tokens.
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@@ -1483,9 +1497,9 @@ GNU Bison NEWS
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the user symbol is used in the reports, the graphs, and the verbose
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error messages instead of "$end", which remains being the default.
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For instance
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%token MYEOF 0
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%token MYEOF 0
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or
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%token MYEOF 0 "end of file"
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%token MYEOF 0 "end of file"
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** Semantic parser
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This old option, which has been broken for ages, is removed.
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@@ -1521,9 +1535,9 @@ GNU Bison NEWS
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Previous versions don't complain when there is a type clash on
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the default action if the rule has a mid-rule action, such as in:
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%type <foo> bar
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%%
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bar: '0' {} '0';
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%type <foo> bar
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%%
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bar: '0' {} '0';
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This is fixed.
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