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45 lines
1.4 KiB
Plaintext
45 lines
1.4 KiB
Plaintext
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Bison News
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----------
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Change in version 1.25:
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* Errors in the input grammar are not fatal; Bison keeps reading
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the grammar file, and reports all the errors found in it.
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* Tokens can now be specified as multiple-character strings: for
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example, you could use "<=" for a token which looks like <=, instead
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of chosing a name like LESSEQ.
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* The %token_table declaration says to write a table of tokens (names
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and numbers) into the parser file. The yylex function can use this
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table to recognize multiple-character string tokens, or for other
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purposes.
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* The %no_lines declaration says not to generate any #line preprocessor
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directives in the parser file.
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* The %raw declaration says to use internal Bison token numbers, not
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Yacc-compatible token numbers, when token names are defined as macros.
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* The --no-parser option produces the parser tables without including
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the parser engine; a project can now use its own parser engine.
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The actions go into a separate file called NAME.act, in the form of
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a switch statement body.
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Changes in version 1.23:
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The user can define YYPARSE_PARAM as the name of an argument to be
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passed into yyparse. The argument should have type void *. It should
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actually point to an object. Grammar actions can access the variable
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by casting it to the proper pointer type.
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Line numbers in output file corrected.
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Changes in version 1.22:
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--help option added.
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Changes in version 1.20:
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Output file does not redefine const for C++.
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