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589 Commits

Author SHA1 Message Date
Akim Demaille
2caaeba496 version 3.1 
* NEWS: Record release date.
 2018-08-27 21:52:23 +02:00
Akim Demaille
55947367c6 NEWS: update 2018-08-24 19:48:19 +02:00
Akim Demaille
44e76d801f lalr1.cc: support compilation with disabled support for exceptions 
Reported by Brooks Moses <bmoses@google.com>
http://lists.gnu.org/archive/html/bison-patches/2018-02/msg00000.html

* data/lalr1.cc (YY_EXCEPTIONS): New.
Use it to disable try/catch clauses.

* doc/bison.texi (C++ Parser Interface): Document it.

* configure.ac (CXXFLAGS_NO_EXCEPTIONS): New.
* tests/atlocal.in: Receive it.
* tests/local.at (AT_FULL_COMPILE, AT_LANG_COMPILE):
Accept a new argument, extra compiler flags.
* tests/calc.at: Run the C++ calculator with exception support disabled.
 2018-08-19 17:47:59 +02:00
Akim Demaille
5010af94d0 portability: don't use _Pragma with ICC 
ICC defines __GNUC__ [1], but does not support GCC's _Pragma for
diagnostics.  As a matter of fact, I believe it does not support
_Pragma at all (only #pragma) [2].

Reported by Maxim Prohorenko.
https://savannah.gnu.org/support/index.php?108339

[1] https://software.intel.com/en-us/cpp-compiler-18.0-developer-guide-and-reference-gcc-compatibility-and-interoperability
[2] https://software.intel.com/en-us/cpp-compiler-18.0-developer-guide-and-reference-pragmas

* data/c.m4 (YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN): Exclude ICC from
the club.
 2018-08-18 14:15:13 +02:00
Akim Demaille
adf0425d11 escape properly the file names in #line for printer/destructor 
Reported by Jannick.
http://lists.gnu.org/archive/html/bug-bison/2017-05/msg00001.html

"Amusingly" enough, we have the same problem with %defines when the
parser file name has backslashes or quotes: we generate #includes with
an incorrect C string.

* src/output.c (prepare_symbol_definitions): Escape properly the file
names before passing them to M4.
* data/bison.m4, data/lalr1.cc: Don't simply put the file name between
two quotes (that should have been strong enough a smell...), expect
the string to be properly quoted.
* tests/synclines.at: New tests to check this.
 2018-08-18 10:04:50 +02:00
Akim Demaille
9c80fa286e NEWS: update 2018-08-11 18:09:29 +02:00
Akim Demaille
70875b4873 doc: we now show the type of the symbols 
* doc/bison.texi (Understanding Your Parser): Update the output
from Bison.
Use types in the example, and show them in the report.
* NEWS: Update.
 2018-06-22 09:51:32 +02:00
Akim Demaille
f462a08572 Merge maint into master 
* upstream/maint: (48 commits)
  THANKS: update an address
  tests: adjust syncline tests to GCC 7
  glr: fix improperly placed synclines
  bison: be git grep friendly
  Replace ftp with https
  maint: post-release administrivia
  version 3.0.5
  bison: style: indentation fixes
  regen
  bison: please address sanitizer
  C++: style: fix indentation
  NEWS: update
  C++: style: prefer `unsigned` to `unsigned int`
  C++: style: space before paren
  C++: fix -Wdeprecated warnings
  tests: fix -Wdeprecated warning
  maint: update syntax-check exclusions
  autoconf: update
  regen
  Update copyright years
  ...
 2018-06-17 18:43:59 +02:00
Akim Demaille
38d91ccd96 maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2018-05-27 14:42:55 +02:00
Akim Demaille
0dfa650f59 version 3.0.5 
* NEWS: Record release date.
 2018-05-27 11:53:43 +02:00
Akim Demaille
1047f3c095 NEWS: update 2018-05-27 10:04:11 +02:00
Akim Demaille
2e9e591889 Update copyright years 
Run `make update-copyright`.
 2018-05-12 18:18:41 +02:00
Paul Eggert
96748b2bf8 Capitalize "Polish" when it's a proper adjective 2017-09-22 09:10:04 -07:00
Akim Demaille
476c1cca59 lalr1, yacc: use the default location as initial error location 
Currently lalr1.cc makes an out-of-bound access when trying to read @1
in rules with an empty rhs (i.e., when there is no @1) that raises an
error (YYERROR).

glr.c already gracefully handles this by using @$ as initial location
for the errors.  Let's do that in yacc.c and lalr1.cc.

* data/lalr1.cc, data/yacc.c: Use @$ to initialize the error location.
* tests/actions.at: Check that case.
 2015-08-12 13:56:07 +02:00
Akim Demaille
d6445ec10b Merge remote-tracking branch 'origin/maint' 
* origin/maint:
  maint: post-release administrivia
  version 3.0.4
  gnulib: update
  build: re-enable compiler warnings, and fix them
  tests: c++: fix a C++03 conformance issue
  tests: fix a title
  c++: reserve 200 slots in the parser's stack
  tests: be more robust to unrecognized synclines, and try to recognize xlc
  tests: fix C++ conformance
  build: fix some warnings
  build: avoid infinite recursions on include_next
 2015-01-23 15:17:35 +01:00
Akim Demaille
7ca7a3abf3 maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2015-01-23 14:13:40 +01:00
Akim Demaille
c4e686a1ab version 3.0.4 
* NEWS: Record release date.
 2015-01-23 13:53:53 +01:00
Akim Demaille
658b189348 tests: c++: fix a C++03 conformance issue 
This fixes test 241 on xLC:

"input.y", line 42.11: 1540-0274 (S) The name lookup for "report" did not find a declaration.
"input.y", line 42.11: 1540-1292 (I) Static declarations are not considered for a function call if the function is not qualified.

where report is:

  static void
  report (std::ostream& yyo, int ival, float fval)
  {
    yyo << "ival: " << ival << ", fval: " <<  fval;
  }

and line 42 is:

  %printer { report (yyo, $$,       $<fval>$); } <ival>;

It turns out that indeed this function must not be declared static,
<http://stackoverflow.com/a/17662745/1353549>.  Let's put it into an
anonymous namespace.

Reported by Thomas Jahns.
http://lists.gnu.org/archive/html/bug-bison/2015-01/msg00059.html

* tests/actions.at (Qualified $$ in actions): Don't use "static",
prefer anonymous namespace.
 2015-01-22 08:45:44 +01:00
Akim Demaille
eabb3df7aa Merge remote-tracking branch 'origin/maint' into origin/master 
* origin/maint:
  doc: minor fixes
  gnulib: strtoul is considered obsolete and now useless
  c++: avoid warnings when destructors don't use $$
  maint: post-release administrivia
  version 3.0.3
  gnulib: update
 2015-01-16 15:14:41 +01:00
Akim Demaille
3e82dfaa0d c++: avoid warnings when destructors don't use $$ 
* data/c++.m4: here.
 2015-01-15 14:29:22 +01:00
Akim Demaille
11d820174f maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2015-01-15 10:24:34 +01:00
Akim Demaille
da6f07468a version 3.0.3 
* NEWS: Record release date.
 2015-01-15 10:04:53 +01:00
Akim Demaille
875ef1b90c symbol: use the first occurrence as an LHS as defining location 
Currently on the following grammar:

    %type <foo> foo
    %%
    start: foo | bar | "baz"
    foo: foo
    bar: bar

bison reports:

    warning: 2 nonterminals useless in grammar [-Wother]
    warning: 4 rules useless in grammar [-Wother]
    1.13-15: warning: nonterminal useless in grammar: foo [-Wother]
     %type <foo> foo
                 ^^^
    3.14-16: warning: nonterminal useless in grammar: bar [-Wother]
     start: foo | bar | "baz"
                  ^^^
    [...]

i.e., the location of the first occurrence of a symbol is taken as its
definition point.  In the case of nonterminals, the first occurrence
as a left-hand side of a rule makes more sense:

    warning: 2 nonterminals useless in grammar [-Wother]
    warning: 4 rules useless in grammar [-Wother]
    4.1-3: warning: nonterminal useless in grammar: foo [-Wother]
     foo: foo
     ^^^
    5.1-3: warning: nonterminal useless in grammar: bar [-Wother]
     bar: bar
     ^^^
    [...]

* src/symtab.h, src/symtab.c (symbol::location_of_lhs): New.
(symbol_location_as_lhs_set): New.
* src/parse-gram.y (current_lhs): Use it.
* tests/reduce.at: Update locations.
 2015-01-14 17:05:35 +01:00
Akim Demaille
650af77812 reduce: don't complain about rules whose lhs is useless 
In the following grammar, the 'exp' nonterminal is trivially useless.
So, of course, its rules are useless too.

    %%
    input: '0' | exp
    exp: exp '+' exp | exp '-' exp | '(' exp ')'

Previously all the useless rules were reported, including those whose
left-hand side is the 'exp' nonterminal:

    warning: 1 nonterminal useless in grammar [-Wother]
    warning: 4 rules useless in grammar [-Wother]
    2.14-16: warning: nonterminal useless in grammar: exp [-Wother]
     input: '0' | exp
                  ^^^
    2.14-16: warning: rule useless in grammar [-Wother]
     input: '0' | exp
                  ^^^
  ! 3.6-16: warning: rule useless in grammar [-Wother]
  !  exp: exp '+' exp | exp '-' exp | '(' exp ')'
  !       ^^^^^^^^^^^
  ! 3.20-30: warning: rule useless in grammar [-Wother]
  !  exp: exp '+' exp | exp '-' exp | '(' exp ')'
  !                     ^^^^^^^^^^^
  ! 3.34-44: warning: rule useless in grammar [-Wother]
  !  exp: exp '+' exp | exp '-' exp | '(' exp ')'
  !                                   ^^^^^^^^^^^

The interest of being so verbose is dubious.  I suspect most of the
time nonterminals are not expected to be useless, so the user wants to
fix the nonterminal, not remove its rules.  And even if the user
wanted to get rid of its rules, the position of these rules probably
does not help more that just having the name of the nonterminal.

This commit discard these messages, marked with '!', and keep the
others.  In particular, we still report:

    2.14-16: warning: rule useless in grammar [-Wother]
     input: '0' | exp
                  ^^^

All the useless rules (including the '!' ones) are still reported in
the reports (xml, text, etc.); only the diagnostics on stderr change.

* src/gram.c (grammar_rules_useless_report): Don't complain about
useless rules whose lhs is useless.
* src/reduce.h, src/reduce.c (reduce_nonterminal_useless_in_grammar):
Take a sym_content as argument.
Adjust callers.
* tests/reduce.at (Useless Rules, Underivable Rules, Reduced Automaton):
Adjust.
 2015-01-14 13:59:53 +01:00
Akim Demaille
ee028dceff c++: fix the use of destructors when variants are enabled 
When using variants, destructors generate invalid code.
<http://lists.gnu.org/archive/html/bug-bison/2014-09/msg00005.html>
Reported by Michael Catanzaro.

* data/c++.m4 (~basic_symbol): b4_symbol_foreach works on yysym:
define it.
* tests/c++.at (Variants): Check it.
 2015-01-09 13:54:58 +01:00
Akim Demaille
827bc59ca1 %union: fix the support for named %union 
Bison supports a union tag, for obscure reasons.  But it does a poor
job at it, especially since Bison 3.0.
Reported by Stephen Cameron and Tobias Frost.

It did not ensure that the name was not given several times.  An easy
way to do this is to make the %union tag be handled as a %define
variable, as they cannot be defined several times.

Since Bison 3.0, the synclines were wrongly placed, resulting in
invalid code.  Addressing this issue, because of the way the union tag
was stored (as a code muscle), would have been tedious.  Unless we
rather define the %union tag as a %percent variable, whose synclines
are easier to manipulate.

So replace the b4_union_name muscle by the api.value.union.name
%define variable, document, and check.

* data/bison.m4: Make sure that api.value.union.name has a keyword value.
* data/c++.m4: Make sure that api.value.union.name is not defined.
* data/c.m4 (b4_union_name): No longer use it, use api.value.union.name.
* doc/bison.texi (%define Summary): Document it.
* src/parse-gram.y (union_name): No longer define b4_uion_name, but
api.value.union.name.
* tests/input.at (Redefined %union name): New.
* tests/synclines.at (%union name syncline): New.
* tests/types.at: Check named %unions.
 2015-01-04 18:00:51 +01:00
Akim Demaille
3209eb1c4c package: bump to 2015 
Which also requires:

* gnulib: Update.
 2015-01-04 17:49:13 +01:00
Akim Demaille
8d4dc896cb yacc.c: fix broken union when api.value.type=union and %defines are used 
Reported by Rich Wilson.

* data/c.m4 (b4_symbol_type_register): Append to b4_union_members,
not b4_user_union_members.
The latter invokes the former, but it is the former which is reinitialized
to empty by b4_value_type_setup_union.
* tests/types.at: Check it.

This reveals another bug, this time in the case of glr.c parsers.

* data/glr.c: Generate the header file before the implementation file,
to be sure that the setup is run before what depends on it.
 2014-12-31 14:39:05 +01:00
Akim Demaille
fc51acddb4 package: bump to 2014 
* AUTHORS, ChangeLog-2012, Makefile.am, NEWS, PACKAGING, README,
* README-alpha, README-hacking, THANKS, TODO, bootstrap.conf,
* build-aux/darwin11.4.0.valgrind, build-aux/local.mk,
* build-aux/update-b4-copyright,
* build-aux/update-package-copyright-year, cfg.mk, configure.ac,
* data/README, data/bison.m4, data/c++-skel.m4, data/c++.m4,
* data/c-like.m4, data/c-skel.m4, data/c.m4, data/glr.c, data/glr.cc,
* data/java-skel.m4, data/java.m4, data/lalr1.cc, data/lalr1.java,
* data/local.mk, data/location.cc, data/stack.hh, data/variant.hh,
* data/xslt/bison.xsl, data/xslt/xml2dot.xsl, data/xslt/xml2text.xsl,
* data/xslt/xml2xhtml.xsl, data/yacc.c, djgpp/Makefile.maint,
* djgpp/README.in, djgpp/config.bat, djgpp/config.sed,
* djgpp/config.site, djgpp/config_h.sed, djgpp/djunpack.bat,
* djgpp/local.mk, djgpp/subpipe.c, djgpp/subpipe.h,
* djgpp/testsuite.sed, doc/bison.texi, doc/local.mk, doc/refcard.tex,
* etc/README, etc/bench.pl.in, etc/local.mk,
* examples/calc++/calc++.test, examples/calc++/local.mk,
* examples/extexi, examples/local.mk, examples/mfcalc/local.mk,
* examples/mfcalc/mfcalc.test, examples/rpcalc/local.mk,
* examples/rpcalc/rpcalc.test, examples/test, examples/variant.yy,
* lib/abitset.c, lib/abitset.h, lib/bbitset.h, lib/bitset.c,
* lib/bitset.h, lib/bitset_stats.c, lib/bitset_stats.h,
* lib/bitsetv-print.c, lib/bitsetv-print.h, lib/bitsetv.c,
* lib/bitsetv.h, lib/ebitset.c, lib/ebitset.h, lib/get-errno.c,
* lib/get-errno.h, lib/lbitset.c, lib/lbitset.h, lib/libiberty.h,
* lib/local.mk, lib/main.c, lib/timevar.c, lib/timevar.def,
* lib/timevar.h, lib/vbitset.c, lib/vbitset.h, lib/yyerror.c,
* m4/bison-i18n.m4, m4/c-working.m4, m4/cxx.m4, m4/flex.m4,
* m4/timevar.m4, src/AnnotationList.c, src/AnnotationList.h,
* src/InadequacyList.c, src/InadequacyList.h, src/LR0.c, src/LR0.h,
* src/Sbitset.c, src/Sbitset.h, src/assoc.c, src/assoc.h,
* src/closure.c, src/closure.h, src/complain.c, src/complain.h,
* src/conflicts.c, src/conflicts.h, src/derives.c, src/derives.h,
* src/files.c, src/files.h, src/flex-scanner.h, src/getargs.c,
* src/getargs.h, src/gram.c, src/gram.h, src/graphviz.c,
* src/graphviz.h, src/ielr.c, src/ielr.h, src/lalr.c, src/lalr.h,
* src/local.mk, src/location.c, src/location.h, src/main.c,
* src/muscle-tab.c, src/muscle-tab.h, src/named-ref.c,
* src/named-ref.h, src/nullable.c, src/nullable.h, src/output.c,
* src/output.h, src/parse-gram.c, src/parse-gram.y, src/print-xml.c,
* src/print-xml.h, src/print.c, src/print.h, src/print_graph.c,
* src/print_graph.h, src/reader.c, src/reader.h, src/reduce.c,
* src/reduce.h, src/relation.c, src/relation.h, src/scan-code.h,
* src/scan-code.l, src/scan-gram.h, src/scan-gram.l, src/scan-skel.h,
* src/scan-skel.l, src/state.c, src/state.h, src/symlist.c,
* src/symlist.h, src/symtab.c, src/symtab.h, src/system.h,
* src/tables.c, src/tables.h, src/uniqstr.c, src/uniqstr.h,
* tests/actions.at, tests/atlocal.in, tests/bison.in, tests/c++.at,
* tests/calc.at, tests/conflicts.at, tests/cxx-type.at,
* tests/existing.at, tests/glr-regression.at, tests/headers.at,
* tests/input.at, tests/java.at, tests/javapush.at, tests/local.at,
* tests/local.mk, tests/named-refs.at, tests/output.at, tests/push.at,
* tests/reduce.at, tests/regression.at, tests/sets.at,
* tests/skeletons.at, tests/synclines.at, tests/testsuite.at,
* tests/torture.at, tests/types.at:
here.
 2014-02-03 15:27:02 +01:00
Akim Demaille
b167e7ba0d package: install the examples 
Currently, we do not install the various examples extracted from the
documentation.  Let's do it, as they are useful starting points.

* configure.ac: When --enable-gcc-warnings is set, enable ENABLE_GCC_WARNINGS.
* examples/extexi: No longer issue synclines by default.
* examples/local.mk: Except if ENABLE_GCC_WARNINGS.
* examples/calc++/local.mk, examples/mfcalc/local.mk,
* examples/rpcalc/local.mk: Install the example files.
 2013-12-09 16:53:14 +01:00
Akim Demaille
461f1516f8 diagnostics: fix the order of multiple declarations reports 
On

  %token FOO "foo"
  %printer {} "foo"
  %printer {} FOO

we report

  /tmp/foo.yy:2.10-11: error: %printer redeclaration for FOO
   %printer {} "foo"
            ^^
  /tmp/foo.yy:3.10-11:     previous declaration
   %printer {} FOO
            ^^

* src/symtab.c (locations_sort): New.
Use it.
* tests/input.at (Invalid Aliases): Stress the order of diagnostics.
 2013-12-09 16:53:03 +01:00
Akim Demaille
0bd5ee5f89 maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2013-12-05 15:16:28 +01:00
Akim Demaille
a3efd13e44 version 3.0.2 
* NEWS: Record release date.
 2013-12-05 14:58:22 +01:00
Akim Demaille
184b42c85b output: do not generate source files when early errors are caught 
Reported by Alexandre Duret-Lutz as "second problem" in:
http://lists.gnu.org/archive/html/bug-bison/2013-09/msg00015.html

One problem is that some errors are caught early, before the
generation of output files, while others can only be detected
afterwards (since, for instance, skeletons can raise errors
themselves).

This will be addressed in two steps: early errors do not generate
source files at all, while later errors will remove the files that
have already been generated.

* src/scan-skel.l (yyout): Open to /dev/null when there are errors.
* tests/output.at (AT_CHECK_FILES): Factored out of...
(AT_CHECK_OUTPUT): this.
Fuse the "SHELLIO" argument in the "FLAGS" one.
Use $5 to denote the expected exit status.
Add a test case for early errors.
 2013-12-04 15:53:01 +01:00
Akim Demaille
be29c71dd8 xml: also use "%empty" with html output 
* data/xslt/xml2xhtml.xsl: No longer issue an Epsilon, display as in
dot and text formats.
 2013-11-26 16:28:22 +01:00
Akim Demaille
7b0ca050f7 news: YYERROR vs variants 2013-11-26 15:31:51 +01:00
Akim Demaille
6d94eebba7 maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2013-11-12 18:37:14 +01:00
Akim Demaille
c2ecada32b version 3.0.1 
* NEWS: Record release date.
 2013-11-12 15:55:33 +01:00
Akim Demaille
265640d56e install: do not install yacc.1 when --disable-yacc 
* configure.ac (ENABLE_YACC): New conditional.
(YACC_SCRIPT, YACC_LIBRARY): Remove.
* lib/local.mk, src/local.mk: Use the former instead of the latter.
* doc/local.mk: Use ENABLE_YACC to avoid installing yacc.1.
 2013-10-22 17:34:22 +02:00
Akim Demaille
39bace5da8 tests: fix incorrect object construction 
Reported by Ken Moffat.
http://lists.gnu.org/archive/html/bug-bison/2013-10/msg00009.html

* tests/c++.at (Exception safety): Here.
 2013-10-21 10:36:53 +02:00
Akim Demaille
071863b3d8 glr: allow spaces between "%?" and "{" in predicates 
Reported by Rici Lake.
http://lists.gnu.org/archive/html/bug-bison/2013-10/msg00004.html
http://stackoverflow.com/questions/19330171/

* src/scan-gram.l: Do not try to be too smart when diagnosing invalid
directives.
* tests/glr-regression.at (Predicates): New test.
 2013-10-16 15:51:25 +02:00
Akim Demaille
e4678430c2 diagnostics: "-Werror -Wno-error=foo" must not emit errors 
Currently "-Werror -Wno-error=foo" still turns "foo" warnings into errors.
Reported by Alexandre Duret-Lutz.
See http://lists.gnu.org/archive/html/bug-bison/2013-09/msg00015.html.

* src/complain.c (errority, errority_flag): New.
(complain_init): Initialize the latter.
(warning_argmatch): Extract the loop iterating on the flag's bits.
Set and unset errority_flag here.
(warnings_argmatch): -Wno-error is not the same as -Wno-error=everything:
we must remember if category foo was explicitly turned in an error/warning
via -W(no-)error=foo.
(warning_severity): Use errority_flag.

* tests/input.at (Symbols): Just check --yacc, not -Wyacc, that's the
job of tests on -W.
(-Werror is not affected by -Wnone and -Wall): Rename as...
(-Werror combinations): this.
Tests more combinations of -W, -W(no-)error, and -W(no-)error=foo.
* tests/local.at (AT_BISON_CHECK_WARNINGS): Don't expect -Werror
to turn runs that issue warnings into runs with errors, as the
warnings might be enforced as warnings by -Wno-error=foo, in which
case -Werror does not change anything.

* doc/bison.texi (Bison Options): Try to be clearer about how
-W(no-)error and -W(no-)error=foo interact.
 2013-10-16 14:56:09 +02:00
Akim Demaille
0a244a2269 tests: do not use grep -q 
Reported by Daniel Galloway.
http://lists.gnu.org/archive/html/bug-bison/2013-08/msg00020.html

* tests/java.at: Ignore grep's output instead.
 2013-09-04 17:26:17 +02:00
Akim Demaille
e386b50f26 maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2013-07-25 18:13:53 +02:00
Akim Demaille
534497f54b version 3.0 
* NEWS: Record release date.
 2013-07-25 17:55:58 +02:00
Akim Demaille
de1a2f20dd news: prepare 3.0 
* NEWS (3.0): Reorder.
 2013-07-25 17:53:59 +02:00
Akim Demaille
facb910cbd maint: post-release administrivia 
* NEWS: Add header line for next release.
* .prev-version: Record previous version.
* cfg.mk (old_NEWS_hash): Auto-update.
 2013-06-24 10:29:36 +02:00
Akim Demaille
8faace8d1d version 2.7.91 
* NEWS: Record release date.
 2013-06-24 10:21:33 +02:00
Akim Demaille
9cdcbdf2cf NEWS: prepare for 2.7.91 
* NEWS (2.7.91): Java push parsers.
 2013-06-24 10:20:46 +02:00
Dennis Heimbigner
aa94def12d java: add push-parser support 
* data/lalr1.java: Capture the declarations as m4 macros to avoid
duplication.  When push parsing, the declarations occur at the class
instance level rather than within the parse() function.

Change the way that the parser state is initialized.  For
push-parsing, the parse state declarations are moved to
"push_parse_initialize()", which is called on the first invocation of
"push_parse()". The %initial-action code is also inserted after the
invocation of "push_parse_initialize()".

The body of the parse loop is modified to return values at appropriate
points when doing push parsing.  In order to make push parsing work,
it is necessary to divide YYNEWSTATE into two states: YYNEWSTATE and
YYGETTOKEN. On the first call to push_parse(), the state is
YYNEWSTATE. On all later entries, the state is set to YYGETTOKEN. The
YYNEWSTATE switch arm falls through into YYGETTOKEN. YYGETTOKEN
indicates that a new token is potentially needed.  Normally, with a
pull parser, this new token would be obtained by calling "yylex()". In
the push parser, the value YYMORE is returned to the caller. On the
next call to push_parse(), the parser will return to the YYGETTOKEN
state and continue operation.

* tests/javapush.at: New test file for java push parsing.
* tests/testsuite.at: Use it.
* tests/local.mk: Adjust.
* doc/bison.texi (Java Push Parser Interface): New.

Signed-off-by: Akim Demaille <akim@lrde.epita.fr>
 2013-06-13 10:38:14 +02:00