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Document the recent error-recovery fix by Paul Hilfinger.

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Paul Eggert
2002-05-24 12:38:52 +00:00
parent 660bc8dd09
commit 68cd8af38b
1 changed files with 9 additions and 0 deletions
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@@ -17,6 +17,15 @@ Changes in version 1.49b:
user specified that one of her tokens is numbered 256, then error user specified that one of her tokens is numbered 256, then error
will be mapped onto another number. will be mapped onto another number.
* Error recovery now conforms to documentation and to POSIX
When a Bison-generated parser encounters a syntax error, it now pops
the stack until it finds a state that allows shifting the error
token. Formerly, it popped the stack until it found a state that
allowed some non-error action other than a default reduction on the
error token. The new behavior has long been the documented behavior,
and has long been required by POSIX. For more details, please see
<http://mail.gnu.org/pipermail/bug-bison/2002-May/001452.html>.
* Large grammars * Large grammars
Large grammars are now supported (large token numbers, large grammar Large grammars are now supported (large token numbers, large grammar
size (= sum of the LHS and RHS lengths), large LALR tables). size (= sum of the LHS and RHS lengths), large LALR tables).