<http://mail.gnu.org/pipermail/bug-bison/2002-November/001815.html>.
* data/glr.c (yyis_pact_ninf, yyis_table_ninf): New macros, which
evaluate to 0 if it's impossible for NINF to be in the respective
table.
(yygetLRActions, yyrecoverParseError): Use them.
* src/scan-gram.l (unexpected_end_of_file): Fix bug: columns were
counted in the token inserted at end of file. Now takes
location_t *, not location_t, so that the location can be
adjusted. All uses changed.
* tests/regression.at (Invalid inputs): Adjust wording in
diagnostic to match the new behavior.
* tests/torture.at (AT_DATA_TRIANGULAR_GRAMMAR,
AT_DATA_HORIZONTAL_GRAMMAR, AT_DATA_LOOKAHEADS_GRAMMAR,
AT_DATA_STACK_TORTURE): Replace `assert (x);' with `if (! (x))
abort ();'. This reduces the runtime of the "Many lookaheads"
test from 27.6 to 2.7 minutes on a 440 MHz Ultrasparc III running
GCC 3.2.
AT_DATA_LOOKAHEADS_GRAMMAR, AT_DATA_STACK_TORTURE): Replace `assert
(x);' with `if (! (x)) abort ();'. This reduces the runtime of the
"Many lookaheads" test from 27.6 to 2.7 minutes on a 440 MHz
Ultrasparc III.
All uses removed.
* src/scan-gram.l: Remove stack option. We no longer use the
stack, since the stack was never deeper than 1; instead, use the
new auto var c_context to record the stacked value.
Remove nounput option. At an unexpected end of file, we now unput
the minimal input necessary to end cleanly; this simplifies the
code.
Avoid unbounded token sizes where this is easy.
(unexpected_end_of_file): New function.
Use it to systematize the error message on unexpected EOF.
(last-string): Now auto, not static.
(YY_OBS_FREE): Remove unnecessary do while (0) wrapper.
(scanner_last_string_free): Remove; not used.
(percent_percent_count): Move decl to just before use.
(SC_ESCAPED_CHARACTER): Return ID at unexpected end of file,
not the (never otherwised-used) CHARACTER.
never deeper than 1; instead, use the new auto var c_context to record
the stacked value.
Remove nounput option. At an unexpected end of file, we now unput
the minimal input necessary to end cleanly; this simplifies the
code.
Avoid unbounded token sizes where this is easy.
(unexpected_end_of_file): New function.
Use it to systematize the error message on unexpected EOF.
(last-string): Now auto, not static.
(YY_OBS_FREE): Remove unnecessary do while (0) wrapper.
(scanner_last_string_free): Remove; not used.
(percent_percent_count): Move decl to just before use.
(SC_ESCAPED_CHARACTER): Return ID at unexpected end of file,
not the (never otherwised-used) CHARACTER.
Initialize to zero if the compiler is being picky.
(INITIAL): Clear braces_level instead of incrementing it.
(SC_BRACED_CODE): Treat <% and %> as { and } when inside C code,
as POSIX 1003.1-2001 requires.
Use consistent diagnostics for reporting type name clashes.
Quote the types with <>, for consistency with Yacc.
* tests/input.at (Type Clashes): Adjust to diagnostic changes.
to check for invalid inputs.
Use mbsnwidth to count columns correctly. Account for tabs, too.
Include mbswidth.h.
(YY_USER_ACTION): Invoke extend_location rather than LOCATION_COLUMNS.
(extend_location): New function.
(YY_LINES): Remove.
Handle CRLF in C code rather than in Lex code.
(YY_INPUT): New macro.
(no_cr_read): New function.
Scan UCNs, even though we don't fully handle them yet.
(convert_ucn_to_byte): New function.
Handle backslash-newline correctly in C code.
(SC_LINE_COMMENT, SC_YACC_COMMENT): New states.
(eols, blanks): Remove. YY_USER_ACTION now counts newlines etc.;
all uses changed.
(tag, splice): New EREs. Do not allow NUL or newline in tags.
Use {splice} wherever C allows backslash-newline.
YY_STEP after space, newline, vertical-tab.
("/*"): BEGIN SC_YACC_COMMENT, not yy_push_state (SC_COMMENT).
(letter, id): Don't assume ASCII; e.g., spell out a-z.
({int}, handle_action_dollar, handle_action_at): Check for integer
overflow.
(YY_STEP): Omit trailing semicolon, so that it's more like C.
(<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>): Allow \0 and \00
as well as \000. Check for UCHAR_MAX, not 255.
Allow \x with an arbitrary positive number of digits, as in C.
Check for overflow here.
Allow \? and UCNs, for compatibility with C.
(handle_symbol_code_dollar): Use quote_n slot 1 to avoid collision
with quote slot used by complain_at.
(Symbols): Document that trigraphs have no special meaning in Bison,
nor is backslash-newline allowed.
(Actions): Document that trigraphs have no special meaning.
Check for close failures.
* src/files.h (xfclose): Return void, not int, since it always
returned zero.
* src/files.c (xfclose): Likewise. Report I/O error if ferror
indicates one.
* src/output.c (output_skeleton): Use xfclose rather than fclose
and ferror. xfclose now checks ferror.
* data/glr.c (YYLEFTMOST_STATE): Remove.
(yyreportTree): Use a stack-based leftmost state. This avoids
our continuing battles with bogus warnings about initializers.
* tests/cxx-type.at (_AT_TEST_GLR_CALC): Include stdlib.h, since
we use malloc. Don't assume 'A' through 'Z' are contiguous.
Don't assume strdup exists; POSIX says its an XSI extension.
Check for buffer overflow on input.
we use malloc. Don't assume 'A' through 'Z' are contiguous.
Don't assume strdup exists; POSIX says its an XSI extension.
Check for buffer overflow on input.
non-fatal error occurs. Formerly, the times were reported in some
such cases but not in others.
* src/reader.c (reader): Just return if a complaint has been issued,
instead of exiting, so that 'main' can report times.
* src/complain.c (warning_issued): Renamed from warn_message_count; now bool.
(complaint_issued): Renamed from complain_message_count; likewise.
* src/main.c (main): Use exit to exit with failure.
* src/complain.c (fatal_at, fatal): Use EXIT_FAILURE and EXIT_SUCCESS
rather than 1 and 0.
* src/main.c (main): Likewise.
* src/getargs.c (getargs): Likewise.
* src/reader.c (reader): Likewise.
* src/getarg.c (getargs): Remove duplicate code for
"Try `bison --help'".
* src/files.c (xfopen, xfclose): Use EXIT_FAILURE rather than 2.
What was that "2" for?
* src/complain.h (fatal, fatal_at): Add __attribute__((__noreturn__)).
* src/getargs.c (usage): Likewise.
* src/getargs.c (getargs): When there are too few operands, report
the last one. When there are too many, report the first extra
one. This is how diffutils does it.
so that we needn't worry about integer overflow (!).
Now of type bool. All uses changed.
(complaint_issued): Renamed from complain_message_count; likewise.
(fatal_at, fatal): Use EXIT_FAILURE and EXIT_SUCCESS rather than 1 and 0.
Include <limits.h> unconditionally, since it's guaranteeed even
for a freestanding C89 compiler.
(SHRT_MIN, SHRT_MAX): Remove, since C89 guarantees them.
(m4_invoke): Remove decl.
(scan_skel): New decl.
(output_skeleton): Use pipe rather than temporary file for m4 input.
Check that m4sugar.m4 is readable, to avoid deadlock.
Check for pipe I/O error.
float, as this generates a warning on Solaris 8 + GCC 3.2 with
--enable-gcc-warnings. Instead, divide into 1.0 rather than 1;
this generates a more-accurate value anyway.
(timervar_accumulate): Rename local variables to avoid confusion
with similarly-named global 'start_time'.
Paul Eggert