freebsd-dev/contrib/bison/NEWS

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Bison News
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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++.