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1Bison News
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3
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4Change in version 1.25:
5
6* Errors in the input grammar are not fatal; Bison keeps reading
7the grammar file, and reports all the errors found in it.
8
9* Tokens can now be specified as multiple-character strings: for
10example, you could use "<=" for a token which looks like <=, instead
11of chosing a name like LESSEQ.
12
13* The %token_table declaration says to write a table of tokens (names
14and numbers) into the parser file. The yylex function can use this
15table to recognize multiple-character string tokens, or for other
16purposes.
17
18* The %no_lines declaration says not to generate any #line preprocessor
19directives in the parser file.
20
21* The %raw declaration says to use internal Bison token numbers, not
22Yacc-compatible token numbers, when token names are defined as macros.
23
24* The --no-parser option produces the parser tables without including
25the parser engine; a project can now use its own parser engine.
26The actions go into a separate file called NAME.act, in the form of
27a switch statement body.
28\f
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29Changes in version 1.23:
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31The user can define YYPARSE_PARAM as the name of an argument to be
32passed into yyparse. The argument should have type void *. It should
33actually point to an object. Grammar actions can access the variable
34by casting it to the proper pointer type.
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6780ca7a 36Line numbers in output file corrected.
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37\f
38Changes in version 1.22:
39
40--help option added.
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41\f
42Changes in version 1.20:
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44Output file does not redefine const for C++.