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revision 1.895 by eggert, Wed Oct 30 09:45:46 2002 UTC revision 1.896 by eggert, Sun Nov 3 08:49:58 2002 UTC
# Line 1  Line 1 
1    2002-11-03  Paul Eggert  <eggert@twinsun.com>
2    
3            * src/scan-gram.l: Revamp to fix POSIX incompatibilities,
4            to count columns correctly, and to check for invalid inputs.
5            
6            Use mbsnwidth to count columns correctly.  Account for tabs, too.
7            Include mbswidth.h.
8            (YY_USER_ACTION): Invoke extend_location rather than LOCATION_COLUMNS.
9            (extend_location): New function.
10            (YY_LINES): Remove.
11    
12            Handle CRLF in C code rather than in Lex code.
13            (YY_INPUT): New macro.
14            (no_cr_read): New function.
15    
16            Scan UCNs, even though we don't fully handle them yet.
17            (convert_ucn_to_byte): New function.
18    
19            Handle backslash-newline correctly in C code.
20            (SC_LINE_COMMENT, SC_YACC_COMMENT): New states.
21            (eols, blanks): Remove.  YY_USER_ACTION now counts newlines etc.;
22            all uses changed.
23            (tag, splice): New EREs.  Do not allow NUL or newline in tags.
24            Use {splice} wherever C allows backslash-newline.
25            YY_STEP after space, newline, vertical-tab.
26            ("/*"): BEGIN SC_YACC_COMMENT, not yy_push_state (SC_COMMENT).
27            
28            (letter, id): Don't assume ASCII; e.g., spell out a-z.
29    
30            ({int}, handle_action_dollar, handle_action_at): Check for integer
31            overflow.
32            
33            (YY_STEP): Omit trailing semicolon, so that it's more like C.
34    
35            (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>): Allow \0 and \00
36            as well as \000.  Check for UCHAR_MAX, not 255.
37            Allow \x with an arbitrary positive number of digits, as in C.
38            Check for overflow here.
39            Allow \? and UCNs, for compatibility with C.
40    
41            (handle_symbol_code_dollar): Use quote_n slot 1 to avoid collision
42            with quote slot used by complain_at.
43    
44            * tests/input.at: Add tests for backslash-newline, m4 quotes
45            in symbols, long literals, and funny escapes in strings.
46    
47            * configure.ac (jm_PREREQ_MBSWIDTH): Add.
48            * lib/Makefile.am (libbison_a_SOURCES): Add mbswidth.h, mbswidth.c.
49            * lib/mbswidth.h, lib/mbswidth.c: New files, from GNU gettext.
50            * m4/Makefile.am (EXTRA_DIST): Add mbswidth.m4.
51            * m4/mbswidth.m4: New file, from GNU coreutils.
52    
53            * doc/bison.texinfo (Grammar Outline): Document // comments.
54            (Symbols): Document that trigraphs have no special meaning in Bison,
55            nor is backslash-newline allowed.
56            (Actions): Document that trigraphs have no special meaning.
57    
58            * src/location.h (LOCATION_COLUMNS, LOCATION_LINES): Remove;
59            no longer used.
60    
61    2002-11-02  Paul Eggert  <eggert@twinsun.com>
62    
63            * src/reader.c: Don't include quote.h; not needed.
64            (get_merge_function): Reword warning to be consistent with
65            type clash diagnostic in grammar_current_rule_check.
66    
67            * lib/quotearg.c (quotearg_buffer_restyled): Fix off-by-two
68            bug in trigraph handling.
69    
70            * src/output.c (prepare_symbols): When printing token names,
71            escape "[" as "@<:@" and likewise for "]".
72    
73            * src/system.h (errno): Remove declaration, as we are now
74            assuming C89 or better, and C89 guarantees errno.
75    
76  2002-10-30  Paul Eggert  <eggert@twinsun.com>  2002-10-30  Paul Eggert  <eggert@twinsun.com>
77    
78          * lib/bitset_stats.c (bitset_stats_read, bitset_stats_write):          * lib/bitset_stats.c (bitset_stats_read, bitset_stats_write):

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