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Annotation of src/usr.bin/yacc/NEW_FEATURES, Revision 1.1

1.1     ! deraadt     1:      The -r option has been implemented.  The -r option tells Yacc to
        !             2: put the read-only tables in y.tab.c and the code and variables in
        !             3: y.code.c.  Keith Bostic asked for this option so that :yyfix could be
        !             4: eliminated.
        !             5:
        !             6:      The -l and -t options have been implemented.  The -l option tells
        !             7: Yacc not to include #line directives in the code it produces.  The -t
        !             8: option causes debugging code to be included in the compiled parser.
        !             9:
        !            10:      The code for error recovery has been changed to implement the same
        !            11: algorithm as AT&T Yacc.  There will still be differences in the way
        !            12: error recovery works because AT&T Yacc uses more default reductions
        !            13: than Berkeley Yacc.
        !            14:
        !            15:      The environment variable TMPDIR determines the directory where
        !            16: temporary files will be created.  If TMPDIR is defined, temporary files
        !            17: will be created in the directory whose pathname is the value of TMPDIR.
        !            18: By default, temporary files are created in /tmp.
        !            19:
        !            20:      The keywords are now case-insensitive.  For example, %nonassoc,
        !            21: %NONASSOC, %NonAssoc, and %nOnAsSoC are all equivalent.
        !            22:
        !            23:      Commas and semicolons that are not part of C code are treated as
        !            24: commentary.
        !            25:
        !            26:      Line-end comments, as in BCPL, are permitted.  Line-end comments
        !            27: begin with // and end at the next end-of-line.  Line-end comments are
        !            28: permitted in C code; they are converted to C comments on output.
        !            29:
        !            30:      The form of y.output files has been changed to look more like
        !            31: those produced by AT&T Yacc.
        !            32:
        !            33:      A new kind of declaration has been added.  The form of the declaration
        !            34: is
        !            35:
        !            36:          %ident string
        !            37:
        !            38: where string is a sequence of characters begining with a double quote
        !            39: and ending with either a double quote or the next end-of-line, whichever
        !            40: comes first.  The declaration will cause a #ident directive to be written
        !            41: near the start of the output file.
        !            42:
        !            43:      If a parser has been compiled with debugging code, that code can be
        !            44: enabled by setting an environment variable.  If the environment variable
        !            45: YYDEBUG is set to 0, debugging output is suppressed.  If it is set to 1,
        !            46: debugging output is written to standard output.