Bison News
----------

Change in perl-bison version 1.25, perl modifications v1.0:

* Added -Lperl flag (-Lc for normal) which causes the parser to be
written in perl code. Also causes Bison to parse actions differently
(to handle perl quoting), and uses @@N in place of @N (since @x is a
valid and very common perl construct). Also substitutes $N inside of
strings (only in perl mode).

Change in version 1.25:

* Errors in the input grammar are not fatal; Bison keeps reading
the grammar file, and reports all the errors found in it.
		
* Tokens can now be specified as multiple-character strings: for
example, you could use "<=" for a token which looks like <=, instead
of chosing a name like LESSEQ.

* The %token_table declaration says to write a table of tokens (names
and numbers) into the parser file.  The yylex function can use this
table to recognize multiple-character string tokens, or for other
purposes.

* The %no_lines declaration says not to generate any #line preprocessor
directives in the parser file.

* The %raw declaration says to use internal Bison token numbers, not
Yacc-compatible token numbers, when token names are defined as macros.

* The --no-parser option produces the parser tables without including
the parser engine; a project can now use its own parser engine.
The actions go into a separate file called NAME.act, in the form of
a switch statement body.

Changes in version 1.23:

The user can define YYPARSE_PARAM as the name of an argument to be
passed into yyparse.  The argument should have type void *.  It should
actually point to an object.  Grammar actions can access the variable
by casting it to the proper pointer type.

Line numbers in output file corrected.

Changes in version 1.22:

--help option added.

Changes in version 1.20:

Output file does not redefine const for C++.