This changes the traces from
Reading a token:
Now at end of input.
to
Reading a token:
Next token is token $end (7FFEE56E6474)
which is ok. Actually it is even better, as it gives the location
when locations are enabled, and is clearer when rules explicitly use
the EOF token.
* data/skeletons/lalr1.d (yytranslate_): Handle eof here, as is done
in lalr1.cc.
Bison used to feature %raw, documented as follows:
@item %raw
The output file @file{@var{name}.h} normally defines the tokens with
Yacc-compatible token numbers. If this option is specified, the
internal Bison numbers are used instead. (Yacc-compatible numbers start
at 257 except for single character tokens; Bison assigns token numbers
sequentially for all tokens starting at 3.)
Unfortunately, as far as I can tell, it never worked: token numbers
are indeed changed in the generated tables (from external token number
to internal), yet the code was still applying the mapping from
external token numbers to internal token numbers.
This commit reintroduces the feature as it was expected to be.
* data/skeletons/bison.m4 (b4_token_format): When api.token.raw is
enabled, use the internal token number.
* data/skeletons/yacc.c (yytranslate): Don't emit if api.token.raw is
enabled.
(YYTRANSLATE): Adjust.
We used to treat lone CRs (\r, aka ^M) as regular NLs (\n), probably
to please Classic MacOS. As of today, it makes more sense to treat \r
like a plain white space character.
https://lists.gnu.org/archive/html/bison-patches/2019-09/msg00027.html
* src/scan-gram.l (no_cr_read): Remove. Instead, use...
(eol): this new abbreviation denoting end-of-line.
* src/location.c (caret_getc): New.
(location_caret): Use it.
* tests/diagnostics.at (Carriage return): Adjust expectations.
(CR NL): New.
When the input file contains lone CRs (aka, ^M, \r), the locations see
a new line. Diagnostics look only at \n as end-of-line, so sometimes
there is an offset in diagnostics. Worse yet: sometimes we loop
endlessly waiting for \n to come from a continuous stream of EOF.
Fix that:
- check for EOF
- beware not to call end_use_class if begin_use_class was not
called (which would abort). This could happen if the actual
line is shorter that the expected one.
Prompted by a (private) report from Marc Schönefeld.
* src/location.c (location_caret): here.
* tests/diagnostics.at (Carriage return): New.
When the input file contains lone CRs (aka, ^M, \r), the locations see
a new line. Diagnostics look only at \n as end-of-line, so sometimes
there is an offset in diagnostics. Worse yet: sometimes we loop
endlessly waiting for \n to come from a continuous stream of EOF.
Fix that:
- check for EOF
- beware not to call end_use_class if begin_use_class was not
called (which would abort). This could happen if the actual
line is shorter that the expected one.
Prompted by a (private) report from Marc Schönefeld.
* src/location.c (location_caret): here.
* tests/diagnostics.at (Carriage return): New.
With
%token EOF 0 EOF 0
we get
input.y:3.14-16: warning: symbol EOF redeclared [-Wother]
3 | %token EOF 0 EOF 0
| ^~~
input.y:3.8-10: previous declaration
3 | %token EOF 0 EOF 0
| ^~~
Assertion failed: (nsyms == ntokens + nvars), function check_and_convert_grammar,
file /Users/akim/src/gnu/bison/src/reader.c, line 839.
Reported by Marc Schönefeld.
* src/symtab.c (symbol_user_token_number_set): Register only the
first definition of the end of input token.
* tests/input.at (Symbol redeclared): Check that case.
The CI, with CC='gcc-7 -fsanitize=undefined,address
-fno-omit-frame-pointer', reports:
calc.cc:1652:50: runtime error: load of value 190, which is not a valid value for type 'bool'
../../tests/calc.at:867: cat stderr
--- expout 2019-09-05 20:30:37.887257545 +0000
+++ /home/travis/build/bison-3.4.1.72-79a1-dirty/_build/tests/testsuite.dir/at-groups/438/stdout 2019-09-05 20:30:37.887257545 +0000
@@ -1 +1,2 @@
syntax error
+calc.cc:1652:50: runtime error: load of value 190, which is not a valid value for type 'bool'
438. calc.at:867: 438. Calculator glr.cc (calc.at:867): FAILED (calc.at:867)
The problem is that yylookaheadNeeds is not initialized in
yyinitStateSet, and when it is copied, the value is not 0 or 1.
* data/skeletons/glr.c (yylookaheadNeeds): Initialize yylookaheadNeeds.
hash_initialize returns NULL when out of memory. Check for it, and
die cleanly instead of crashing.
Reported by 江 祖铭 (Zu-Ming Jiang).
https://lists.gnu.org/archive/html/bug-bison/2019-08/msg00015.html
* src/muscle-tab.c, src/state.c, src/symtab.c, src/uniqstr.c:
Check the value returned by hash_initialize.
* .travis.yml: Bionic is now available, with GCC8.
GCC7 sanitizers work, but they are too longer: cover only part 1.
Redefine part 1 and part 2 so that part 1 is really the core of the
tests: not playing with POSIX and C++ compiler for C code.
Travis answered favorably to my suggestion to provide a means to
disable git clone on some jobs (issue 7542). See
https://docs.travis-ci.com/user/customizing-the-build/#disabling-git-clone.
* .travis.yml: Disable git globally, enable it for i. the compile job,
and ii. the test job on ICC which needs the install-icc.sh script.
With
%token EOF 0 EOF 0
we get
input.y:3.14-16: warning: symbol EOF redeclared [-Wother]
3 | %token EOF 0 EOF 0
| ^~~
input.y:3.8-10: previous declaration
3 | %token EOF 0 EOF 0
| ^~~
Assertion failed: (nsyms == ntokens + nvars), function check_and_convert_grammar,
file /Users/akim/src/gnu/bison/src/reader.c, line 839.
Reported by Marc Schönefeld.
* src/symtab.c (symbol_user_token_number_set): Register only the
first definition of the end of input token.
* tests/input.at (Symbol redeclared): Check that case.
The CI, with CC='gcc-7 -fsanitize=undefined,address
-fno-omit-frame-pointer', reports:
calc.cc:1652:50: runtime error: load of value 190, which is not a valid value for type 'bool'
../../tests/calc.at:867: cat stderr
--- expout 2019-09-05 20:30:37.887257545 +0000
+++ /home/travis/build/bison-3.4.1.72-79a1-dirty/_build/tests/testsuite.dir/at-groups/438/stdout 2019-09-05 20:30:37.887257545 +0000
@@ -1 +1,2 @@
syntax error
+calc.cc:1652:50: runtime error: load of value 190, which is not a valid value for type 'bool'
438. calc.at:867: 438. Calculator glr.cc (calc.at:867): FAILED (calc.at:867)
The problem is that yylookaheadNeeds is not initialized in
yyinitStateSet, and when it is copied, the value is not 0 or 1.
* data/skeletons/glr.c (yylookaheadNeeds): Initialize yylookaheadNeeds.
* .travis.yml: Bionic is now available, with GCC8.
GCC7 sanitizers work, but they are too longer: cover only part 1.
Redefine part 1 and part 2 so that part 1 is really the core of the
tests: not playing with POSIX and C++ compiler for C code.
hash_initialize returns NULL when out of memory. Check for it, and
die cleanly instead of crashing.
Reported by 江 祖铭 (Zu-Ming Jiang).
https://lists.gnu.org/archive/html/bug-bison/2019-08/msg00015.html
* src/muscle-tab.c, src/state.c, src/symtab.c, src/uniqstr.c:
Check the value returned by hash_initialize.
* tests/regression.at: Use %expect to avoid warnings.
Set the keywords to facilitate running specific tests.
Use macros such as AT_YYLEX_DECLARE to facilitate tests for other
languages.
Likewise for AT_FULL_COMPILE.
In Texinfo. empty lines in multitable rows generate empty lines in the
output. Avoid them altogether.
With help from Gavin Smith.
https://lists.gnu.org/archive/html/bug-texinfo/2019-07/msg00000.html
* build-aux/cross-options.pl: Separate rows with empty lines.
So, to be more readable, generate a single line for each row.
Use Perl format to this end.
See the previous commit. This option should be removed, -o suffices.
* src/getargs.c (FIXED_OUTPUT_FILES): New.
Add support for it.
(getargs): Define loc, and use it.
This is safer when we need to pass a pointer to a location.
The name fixed-output-files is pretty clear: generate y.tab.c, as Yacc
does. So let's detach this from %yacc which does more: it requires
POSIX Yacc behavior.
This directive is obsolete since December 29th 2001
8c9a50bee1. It does not show in the
doc. I don't want to spend more time on improving its diagnostics, it
could be removed just as well as far as I'm concerned.
* src/scan-gram.l, src/parse-gram.y (%fixed-output-files): Detach from
%yacc.
Years ago we moved from 'look-ahead' to 'lookahead', and that alias
was kept for backward compatibility. But now that we use argmatch to
generate the documentation, that value clutters the doc.
* src/getargs.c (argmatch_report_args): Remove the
--report=look-aheads alias.
The doc says that -Dfoo=bar is the same as %define foo "bar". It is
not: the quotes are not added (and it makes a difference).
* doc/bison.texi (Tuning the Parser): Fix the definition of -D/-F
* src/getargs.c (usage): Likewise.
Let's clarify --help: use clearer "section" names, as in the doc.
Move --yacc to where it belongs.
* src/getargs.c (usage): Rename "Parser" as "Tuning the Parser", as in
the doc.
Rename "Output" as "Output Files"
Move --yacc to "Tuning the Parser".
* doc/bison.texi: Likewise.
It can now generate the usage message.
* src/complain.h (feature_fixit_parsable): Rename as...
(feature_fixit): this, for column economy.
Adjust dependencies.
(warning_usage): New.
Use it.
* src/complain.h, src/complain.c, src/getargs.h, src/getargs.c:
Use ARGMATCH_DEFINE_GROUP instead of the older interface.
The code is inconsistent: sometimes we pass by value, sometimes by
reference. Let's stick to the last, more conventional for large
values in C.
* src/scan-code.l: Pass locations by reference.
* configure.ac (DCFLAGS): Pass -g.
* data/skeletons/d.m4 (b4_locations_if): Remove, let bison.m4's one do
its job.
* data/skeletons/lalr1.d (position): Leave filename empty by default.
(position::toString): Don't print empty file names.
(location::this): New ctor.
(location::toString): Match the implementations of C/C++.
(yy_semantic_null): Leave undefined, the previous implementation does
not compile.
* tests/calc.at: Improve the implementation for D.
Enable more checks, in particular using locations.
* tests/local.at (AT_YYERROR_DEFINE(d)): Fix its implementation.
Sadly enough, AFAIK, there were never answers to the "More user
feedback will help to stabilize it" sentences. Remove them.
* src/getargs.c: IELR, canonical LR and XML output are here to stay,
and they are no more experimental than some other features.
* doc/bison.texi: Likewise.
Also remove "experimental" warning for Java, LAC, LR tuning options,
and named references.
* data/skeletons/lalr1.java: Use more conventional function names for
Java.
Prefer < and <= to => and >.
Use the same approach for m4 quotation as in the other skeletons.
Fix indentation issues.
* tests/calc.at, tests/java.at, tests/javapush.at: Fix quotation style.
(main): Use 'args', not 'argv', the former seems more conventional and
is used elsewhere in Bison.
Prefer character literals to integers to denote characters.
* examples/java/Calc.y: Likewise.
Akim Demaille