Bison News
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+Changes in version 1.75c:
-Changes in version 1.75b:
+Changes in version 1.75b, 2002-11-13:
-* Bison now parses C99 lexical constructs like digraphs, UCNs, and
- backslash-newline within C escape sequences, as POSIX now requires.
+* %destructor
+ It is now possible to reclaim the memory associated to symbols
+ discarded during error recovery. This feature is still experimental.
+
+* Bison now parses C99 lexical constructs like UCNs and
+ backslash-newline within C escape sequences, as POSIX 1003.1-2001 requires.
* --no-line works properly.
In addition, they provide a means for yyerror to remain pure, and
to access to the current location.
+ #defining yyerror to steal internal variables is strongly
+ discouraged. It is not guaranteed to work for ever.
+
* #line
Bison now recognizes #line in its input, and forwards them.
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 YYEOF 0
+ %token MYEOF 0
or
- %token YYEOF 0 "end of file"
+ %token MYEOF 0 "end of file"
* Semantic parser
This old option, which has been broken for ages, is removed.
\f
Changes in version 1.30, 2001-10-26:
-* `--defines' and `--graph' have now an optionnal argument which is the
- output file name. `-d' and `-g' do not change, they do not take any
+* `--defines' and `--graph' have now an optional argument which is the
+ output file name. `-d' and `-g' do not change; they do not take any
argument.
* `%source_extension' and `%header_extension' are removed, failed