Changes in version 1.49b:
+* GLR parsing
+ The declaration
+ %glr-parser
+ causes Bison to produce a Generalized LR (GLR) parser, capable of handling
+ almost any context-free grammar, ambiguous or not. The new declarations
+ %dprec and %merge on grammar rules allow parse-time resolution of
+ ambiguities. Contributed by Paul Hilfinger.
+
+* Output Directory
+ When not in Yacc compatibility mode, when the output file was not
+ specified, runnning `bison foo/bar.y' created `foo/bar.c'. It
+ now creates `bar.c'.
+
* Undefined token
The undefined token was systematically mapped to 2 which prevented
the use of 2 from the user. This is no longer the case.
* Useless rules, useless nonterminals
They are now reported, as a warning, with their locations.
+* Rules never reduced
+ Rules that can never be reduced because of conflicts are now
+ reported.
+
* Incorrect `Token not used'
On a grammar such as