ChangeLog

2003-06-25  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgbatest/ltl2tgba.cc: Support -v.

2003-06-24  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgbatest/ltl2tgba.cc (syntax): Fix usage message.

	* src/tgbatest/tripprod.test, src/tgbatest/explprod.test: Sort
	accepting conditions.

	* src/ltlvisit/nenoform.cc (negative_normal_form): New const variant.
	* src/ltlvisit/nenoform.hh (negative_normal_form): New const variant.
	* src/ltlvisit/lunabbrev.cc (unabbreviate_logic): New const variant.
	* src/ltlvisit/lunabbrev.hh (unabbreviate_logic): New const variant.
	* src/ltlvisit/tunabbrev.cc (unabbreviate_ltl): New const variant.
	* src/ltlvisit/tunabbrev.hh (unabbreviate_ltl): New const variant.

2003-06-23  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	Switch from "promises" to "accepting sets".  Fix the definitions
	of these accepting sets so that they are really useful.  Provide
	an all_accepting_conditions() method for use in the emptyness
	check, and a neg_accepting_conditions() for products.  Predeclare
	TGBA accepting conditions in the i/o.

	* src/tgba/bddprint.cc (want_prom): Rename as ...
	(want_prom): ... this.
	(print_handler): Adjust to display Acc[].
	(print_acc_handler, bdd_print_acc): New functions.
	* src/tgba/bddprint.hh (print_acc_handler, bdd_print_acc):
	New functions.
	* src/tgba/succiter.hh (current_promise): Rename as ...
	(current_accepting_conditions): ... this.
	* src/tgba/succiterconcrete.cc (current_state):
	Rename next to now.
	(current_promise): Rename as ...
	(current_accepting_conditions): ... this, and compute
	the accepting conditions.
	* src/tgba/dictunion.cc, src/tgba/ltl2tgba.cc,
	src/tgba/succiterconcrete.hh,
	src/tgba/tgbabddconcretefactory.cc,
	src/tgba/tgbabddcoredata.cc, src/tgba/tgbabddcoredata.hh,
	src/tgba/tgbabdddict.hh, src/tgba/tgbabdddict.cc,
	src/tgba/tgbabddtranslatefactory.cc,
	src/tgbaalgos/dotty.cc: Adjust to new names.
	* src/tgba/tgba.hh (all_accepting_conditions,
	neg_accepting_conditions): New functions.
	* src/tgba/tgbabddconcretefactory.cc: Adjust to new
	names, and record accepting conditions instead of promises.
	* src/tgba/tgbabddcoredata.hh (accepting_conditions,
	all_accepting_conditions, negacc_set): New variables.
	(notnow_set, notprom_set, declare_promise): Rename as ...
	(notnext_set, notacc_set, declare_accepting_condition): ... these.
	* src/tgba/tgbaexplicit.hh
	(tgba_explicit_succ_iterator::current_promise): Rename as ...
	(tgba_explicit_succ_iterator::current_accepting_conditions): ... this.
	(tgba_explicit::add_promise): Rename as ...
	(tgba_explicit::add_accepting_condition): ... this.
	(tgba_explicit::declare_accepting_condition,
	tgba_explicit::has_accepting_condition): New variables.
	(tgba_explicit::get_promise): Rename as ...
	(tgba_explicit::get_accepting_condition): ... this.
	(tgba_explicit::all_accepting_conditions,
	tgba_explicit::neg_accepting_conditions): Implement them.
	(all_accepting_conditions, neg_accepting_conditions,
	all_accepting_conditions): New variables.
	(tgba_explicit_succ_iterator): Embed all_accepting_conditions_.
	* src/tgba/tgbaexplicit.cc: Likewise.
	* src/tgba/tgbaproduct.hh
	(tgba_product_succ_uterator): Embed left_neg_ and right_neg_.
	(tgba_product::all_accepting_conditions,
	tgba_product::neg_accepting_conditions): Implement them.
	* src/tgba/tgbatranslateproxy.hh:
	(tgba_translate_proxy::all_accepting_conditions,
	tgba_translate_proxy::neg_accepting_conditions): Implement them.
	* src/tgba/tgbatranslateproxy.cc: Likewise.
	* src/tgbaalgos/save.cc (save_rec): Call bdd_print
	(tgba_save_reachable): Output the `acc =' line.
	* src/tgbaparse/tgbaparse.yy: Support the for
	accepting conditions definitions using an "acc =" line
	at the start.  Later, use has_accepting_condition while
	parsing	accepting conditions to ensure they were declared.
	Disallow !cond in accepting conditions.
	* src/tgbaparse/tgbascan.ll (ACC_DEF): New token.
	* src/tgbatest/explicit.cc (main): Declare accepting conditions.
	* src/tgbatest/ltl2tgba.cc (main): Add support for the -a, -A,
	and -R new options.
	* src/tgbatest/tgbaread.cc (main): Really exit on parse error.
	* src/tgbatest/explicit.test, src/tgbatest/explprod.test,
	src/tgbatest/mixprod.test, src/tgbatest/readsave.test,
	src/tgbatest/tgbaread.test, src/tgbatest/tripprod.test: Reflect
	recent changes.

2003-06-22  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgbatest/tripprod.test, src/tgbatest/explprod.test:
	Sort out some possible inversions in the output.

2003-06-19  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/tgbabddconcretefactory.cc
	(tgba_bdd_concrete_factory::~tgba_bdd_concrete_factory): destroy the
	formulae used as keys in prom_.
	(tgba_bdd_concrete_factory::create_promise): Delete.
	(tgba_bdd_concrete_factory::declare_promise,
	tgba_bdd_concrete_factory::finish): New functions.
	* src/tgba/tgbabddconcretefactory.hh
	(tgba_bdd_concrete_factory::create_promise): Delete.
	(tgba_bdd_concrete_factory::declare_promise,
	tgba_bdd_concrete_factory::finish): New functions.
	(tgba_bdd_concrete_factory::prom_): New map.
	* src/tgba/ltl2tgba.cc (ltl_trad_visitor::visit): Adjust
	the Fx and aUb cases to register promises with
	tgba_bdd_concrete_factory::declare_promise().
	(ltl2tgba): Call tgba_bdd_concrete_factory::finish().

	* src/tgba/tgbabddconcrete.cc (set_init_state, succ_iter):
	Revert the change from 2003-06-12, it needs more work (the
	automaton generated on Xa&(b U !a) was bogus, with that
	patch).

	* src/tgbatest/ltl2tgba.cc: Handle the -o and -r options.

	* src/tgbatest/tripprod.test, src/tgbatest/explprod.test,
	src/tgbatest/readsave.test: Adjust to reflect yesterday's
	bddprint.cc change.

2003-06-18  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/bddprint.cc (print_handler): Quote promises
	when !want_prom.
	* src/tgbaparse/tgbaparse.yy (prop_list): Accept strings or
	identifiers.  Discard empty strings.
	* src/tgbatest/mixprod.cc, src/tgbatest/mixprod.test: New file.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add mixprod.
	(mixprod_SOURCES): New variable.
	(TESTS): Add mixprod.test.

2003-06-17  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/tgbaproduct.cc (state_bdd_product::state_bdd_product):
	New constructor.
	* src/tgba/tgbaproduct.hh (state_bdd_product::state_bdd_product):
	New constructor.
	* tgbatest/tripprod.cc, tgbatest/tripprod.test: New files.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add explprod.
	(tripprod_SOURCES): New variable.
	(CLEANFILES): Add input3.
	(TESTS): Add tripprod.test.

2003-06-16  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/tgbabddprod.cc, src/tgba/tgbabddprod.hh: Rename as ...
	* src/tgba/tgbaproduct.cc, src/tgba/tgbaproduct.hh: ... these.
	(tgba_bdd_product, tgba_bdd_product_succ_iterator): Rename as ...
	(tgba_product, tgba_product_succ_iterator): ... these, and adjust
	all uses.
	* src/tgba/tgbabddtranslateproxy.cc,
	src/tgba/tgbabddtranslateproxy.hh: Rename as ...
	* src/tgba/tgbatranslateproxy.cc,
	src/tgba/tgbatranslateproxy.hh: ... these.
	(tgba_bdd_translate_proxy, tgba_bdd_translate_proxy_succ_iterator):
	Rename as ...
	(tgba_translate_proxy, tgba_translate_proxy_succ_iterator): ... these,
	and adjust all uses.

	Make sure we can multiply two tgba_explicit.

	* tgba/state.hh (state::translate, state::clone, state::as_bdd):
	New virtual methods.
	* tgba/stataebdd.cc (state::translate, state::clone): New methods.
	* tgba/stataebdd.hh (state::translate, state::clone): New methods.
	* tgba/tgbabddprod.cc (state_bdd_product::clone,
	tgba_bdd_product_succ_iterator::~tgba_bdd_product_succ_iterator):
	New methods.
	(tgba_bdd_product_succ_iterator::first): Reset right_
	if any of left_ or right_ is already done (i.e., is empty).
	(tgba_bdd_product_succ_iterator::done): Return true
	if right_ is NULL.
	(tgba_bdd_product_succ_iterator::current_state,
	tgba_bdd_product::get_init_state): Work	directory with `state's.
	* tgba/tgbabddprod.hh (state_bdd_product::clone,
	tgba_bdd_product_succ_iterator::~tgba_bdd_product_succ_iterator):
	New methods.
	* tgba/tgbabddtranslateproxy.cc
	(tgba_bdd_translate_proxy_succ_iterator::
	tgba_bdd_translate_proxy_succ_iterator): Work on any kind of iteraator.
	(tgba_bdd_translate_proxy_succ_iterator::
	~tgba_bdd_translate_proxy_succ_iterator): New method.
	(tgba_bdd_translate_proxy_succ_iterator::current_state,
	tgba_bdd_translate_proxy::get_init_state,
	tgba_bdd_translate_proxy::succ_iter): Work on `state's and
	`tgba_succ_iterator's directlry.
	(tgba_bdd_translate_proxy::format_state): Delegate formating
	to the proxied automata.
	* tgba/tgbaexplicit.cc (state_explicit::clone): New method.
	* src/tgba/tgbaexplicit.cc (tgba_explicit::get_condition,
	tgba_explicit::get_promise): Call ltl::destroy on existing formulae.
	* tgbatest/explprod.cc, tgbatest/explprod.test: New files.
	* tgbatest/Makefile.am (check_PROGRAMS): Add explprod.
	(explprod_SOURCES): New variable.
	(TESTS): Add explprod.test.
	(CLEANFILES): Add input1 and input2.

2003-06-12  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/tgbabddconcrete.cc (set_init_state, succ_iter): Make
	sure to compute the status of the most Now variables possible.
	This helps to identify equivalant states.
	(tgba_bdd_concrete): Call set_init_state.

2003-06-10  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/ltl2tgba.cc (ltl_trad_visitor::visit): Handle F and G.
	* src/tgbatest/ltl2tgba.test: Use F and G.

2003-06-06  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgbatest/bddprod.test: New file.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add bddprod.
	(bddprod_SOURCES, bddprod_CXXFLAGS): New variables.
	(TESTS): Add bddprod.test.
	* src/tgbatest/ltlprod.c: Handle BDD_CONCRETE_PRODUCT.

	* src/tgba/dictunion.cc (tgba_bdd_dict_union): Clone formulae
	while building new dictionary.
	* src/tgbatest/ltlprod.test, src/tgbatest/ltlprod.cc: New files.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add ltlprod.
	(ltlprod_SOURCES): New variable.
	(TESTS): Add ltlprod.test.

	* src/ltlvisit/clone.cc (clone): New const version.
	* src/ltlvisit/clone.hh (clone): Likewise.
	* src/ltlvisit/destroy.cc (destroy): New const version.
	* src/ltlvisit/destroy.hh (destroy): Likewise.
	* src/tgba/tgbabddconcretefactory.cc
	(tgba_bdd_concrete_factory::create_state,
	tgba_bdd_concrete_factory::create_atomic_prop,
	tgba_bdd_concrete_factory::promise): Clone new formulae.
	* src/tgba/tgbabdddict.cc (tgba_bdd_dict::tgba_bdd_dict,
	tgba_bdd_dict::~tgba_bdd_dict, tgba_bdd_dict::operator=): New methods
	that clone and destroy formulae.
	* src/tgbatest/ltl2tgba.test, src/tgbatest/ltl2tgba.cc: New files.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add ltl2tgba.
	(ltl2tgba_SOURCES): New variable.
	(TESTS): Add ltl2tgba.test.

	* src/ltltest/equals.cc, src/ltltest/readltl.cc,
	src/tgba/bddprint.cc, src/ltltest/tostring.cc: Include <cassert>.

2003-06-05  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/bddprint.cc (dict): Make this variable static.
	(want_prom): New global static variable.
	(print_handle): Honor want_prom.
	(print_sat_handler, bdd_print_sat, bdd_format_sat): New functions.
	(bdd_print_set, bdd_print_dot, bdd_print_table): Set want_prom.
	* src/tgba/bddprint.hh (bdd_print_sat, bdd_format_sat): New functions.
	* src/tgbaalgos/save.cc, src/tgbaalgos/save.hh,
	src/tgbatest/readsave.cc, src/tgbatest/readsave.test: New files.
	* src/tgbaalgos/Makefile.am (libtgbaalgos_la_SOURCES): Add
	save.cc and save.hh.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add readsave.
	(readsave_SOURCES): New variable.
	(TESTS): Add readsave.test.

	* configure.ac: Output src/tgbaparse/Makefile.
	* src/Makefile.am (SUBDIRS): Add tgbaparse.
	(libspot_la_LDADD): Add tgbaparse/libtgbaparse.la.
	* src/tgba/tgbaexplicit.cc (tgba_explicit::get_condition,
	tgba_explicit::get_promise, tgba_explicit::add_neg_condition,
	tgba_explicit::add_neg_promise): New methods.
	* src/tgba/tgbaexplicit.hh: Declare them.
	* src/tgbaparse/Makefile.am, src/tgbaparse/fmterror.cc,
	src/tgbaparse/parsedecl.hh, src/tgbaparse/public.hh,
	src/tgbaparse/tgbaparse.yy, src/tgbaparse/tgbascan.ll,
	src/tgbatest/tgbaread.cc, src/tgbatest/tgbaread.test: New files.
	* src/tgbatest/Makefile.am (check_PROGRAMS): Add tgbaread.
	(TESTS): Add tgbaread.cc.
	(CLEANFILES): Add input.
	(tgbaread_SOURCES): New variable.

	* src/ltlparse/ltlparse.yy: Typo in comment.

	* configure.ac: Output src/tgbatest/Makefile and src/tgbatest/defs.
	* src/Makefile.am (SUBDIRS): Add tgbatest.
	* src/tgba/tgbaexplicit.hh, src/tgba/tgbaexplicit.cc: New file.
	* src/tgba/Makefile.am (libtgba_la_SOURCES): Add tgbaexplicit.cc
	and tgbaexplicit.hh.
	* src/tgbatest/Makefile.am, src/tgbatest/defs.in,
	src/tgbatest/explicit.cc, src/tgbatest/explicit.test: New files.

2003-06-04  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/ltlparse/ltlparse.yy (result): Suppress unused definition.

	* src/Makefile.am (SUBDIRS): Build `ltltest' after `.'.

	* src/ltlparse/ltlscan.ll: Use ltlyy as %prefix.
	* src/ltlparse/parsedecl.hh (YY_DECL): Rename yylex to ltlyylex.
	* src/ltlparse/ltlparse.yy: Define yylex as ltlyylex.

2003-06-03  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/dictunion.cc, src/tgba/ltl2tgba.cc,
	src/tgba/succiterconcrete.cc, src/tgba/tgbabddconcrete.cc,
	src/tgba/tgbabddprod.cc, src/tgba/tgbabddtranslatefactory.cc,
	src/tgba/tgbabddtranslateproxy.cc: Include <cassert>.

2003-06-02  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/tgbabdddict.cc, src/tgba/tgbabdddict.hh: New files.
	* src/tgba/Makefile.am (libtgba_la_SOURCES): Add them.
	* src/tgba/tgbabdddict.cc (tgba_bdd_dict::contains): New function.
	* src/tgba/tgbabdddict.hh (tgba_bdd_dict::contains): Likewise.

2003-05-28  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/statebdd.hh (state_bdd::as_bdd): Add non-const variant.
	* src/tgba/tgbabddtranslateproxy.cc,
	src/tgba/tgbabddtranslateproxy.hh: New files.
	* src/tgba/Makefile.am (libtgba_la_SOURCES): Add them.

2003-05-27  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgba/bddprint.cc, src/tgba/bddprint.hh,
	src/tgba/dictunion.hh, src/tgba/ltl2tgba.cc, src/tgba/ltl2tgba.hh,
	src/tgba/tgbabddconcretefactory.hh,
	src/tgba/tgbabddconcreteproduct.cc,
	src/tgba/tgbabddconcreteproduct.hh, src/tgba/tgbabddfactory.hh,
	src/tgba/tgbabddtranslatefactory.hh, src/tgbaalgos/dotty.cc:
	Add Doxygen comments.

	* src/tgba/bddfactory.hh, src/tgba/statebdd.hh,
	src/tgba/succiterconcrete.hh, src/tgba/tgbabddconcrete.hh,
	src/tgba/tgbabddcoredata.hh, src/tgba/tgbabdddict.hh: Add
	Doxygen comments.

	* src/tgba/bddprint.hh (bdd_format_set): New function.
	* src/tgba/bddprint.cc (bdd_format_set): Likewise.
	* src/tgba/state.hh: Add Doxygen comments.
	(state::compare): Take a state*, not a state&.
	(state_ptr_less_than): New functor.
	* src/tgba/statebdd.hh (state_bdd::compare): Take a state*, not a
	state&.
	* src/tgba/statebdd.cc (state_bdd::compare): Likewise.
	* src/tgba/succiter.hh: Add Doxygen comments.
	* src/tgba/tgba.hh: Mention promises.
	(tgba::formate_state): New pure virtual method.
	* src/tgba/tgbabddconcrete.hh (tgba_bdd_concrete::formate_state):
	New method.
	* src/tgba/tgbabddconcrete.cc (tgba_bdd_concrete::formate_state):
	Likewise.
	* src/tgbaalgos/dotty.cc: Adjust to use state_ptr_less_than
	and tgba::formate_state.

	* src/tgba/succiter.hh (tgba_succ_iterator::current_state):
	Return a state*, not a state_bdd.
	* src/tgba/succiterconcrete.hh
	(tgba_succ_iterator_concrete::current_state): Return a state_bdd*,
	not a state_bdd.
	* src/tgba/tgba.hh: Add Doxygen comments.
	(tgba::succ_iter, tgba::get_init_state): Use state*, not state_bdd.
	* src/tgba/tgbabddconcrete.hh (tgba_bdd_concrete::get_init_state):
	Return a state_bdd*, not a state_bdd.
	(tgba_bdd_concrete::get_init_bdd): New method.
	(tgba_bdd_concrete::succ_uter): Take a state* as argument.
	* src/tgba/tgbabddconcrete.cc: Likewise.
	* src/tgba/tgbabddtranslatefactory.cc
	(tgba_bdd_translate_factory::tgba_bdd_translate_factory): Use
	tgba_bdd_concrete::get_init_bdd.
	* src/tgbaalgos/dotty.cc (dotty_state, dotty_rec, dotty): Adjust
	to use state* instead of state_bdd.
	* src/tgba/succlist.hh: Delete.  (Leftover from a previous
	draft.)

2003-05-26  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/tgbaalgos/dotty.cc, src/tgbaalgos/dotty.hh: New files.
	* src/tgbaalgos/Makefile.am (libtgbaalgos_la_SOURCES): Add them.

	* src/tgba/tgbabddtranslatefactory.cc
	(tgba_bdd_translate_factory::compute_pairs): Be quiet.

	* src/Makefile.am (SUBDIRS): Add tgbaalgos.
	(libspot_la_LIBADD): Add tgba/libtgbaalgos.
	* src/tgbaalgos/Makefile.am: New file.
	* configure.ac: Output src/tgbaalgos/Makefile.

	* src/tgba/bddprint.hh, src/tgba/bddprint.cc: New files.
	* src/tgba/Makefile.am (libtgba_la_SOURCES): Add them.
	* src/tgba/public.hh: Include bddprint.hh.

	* src/tgba/tgba.hh: Rename as ...
	* src/tgba/public.hh: .. this.
	* src/tgba/tgba.hh: New file.
	* src/tgba/Makefile.am (libtgba_la_SOURCES): Add public.hh.
	* src/tgba/tgbabddconcrete.hh (tgba_bdd_concrete): Inherit from tgba.
	(tgba_bdd_concrete::init_iter): Delete.
	(tgba_bdd_concrete::succ_iter): Take a state_bdd as argument,
	not a bdd.
	* src/tgba/tgbabddconcrete.cc: Likewise.

	Initial code for TGBA (Transition Generalized Bchi Automata).
	Contains tgba_bdd, a BDD-encoded TGBA, and ltl_to_tgba,
	a LTL-to-TGBA translator using Couvreur's algorithm.

	* src/Makefile.am (SUBDIRS): Add tgba.
	(libspot_la_LIBADD): Add tgba/libtgba.la.
	* configure.ac: Output src/tgba/Makefile.
	* src/tgba/Makefile.am, src/tgba/bddfactory.cc,
	src/tgba/bddfactory.hh, src/tgba/dictunion.cc,
	src/tgba/dictunion.hh, src/tgba/ltl2tgba.cc, src/tgba/ltl2tgba.hh,
	src/tgba/state.hh, src/tgba/statebdd.cc, src/tgba/statebdd.hh,
	src/tgba/succiter.hh, src/tgba/succiterconcrete.cc,
	src/tgba/succiterconcrete.hh, src/tgba/succlist.hh,
	src/tgba/tgba.hh, src/tgba/tgbabddconcrete.cc,
	src/tgba/tgbabddconcrete.hh, src/tgba/tgbabddconcretefactory.cc,
	src/tgba/tgbabddconcretefactory.hh,
	src/tgba/tgbabddconcreteproduct.cc,
	src/tgba/tgbabddconcreteproduct.hh, src/tgba/tgbabddcoredata.cc,
	src/tgba/tgbabddcoredata.hh, src/tgba/tgbabdddict.cc,
	src/tgba/tgbabdddict.hh, src/tgba/tgbabddfactory.hh,
	src/tgba/tgbabddtranslatefactory.cc,
	src/tgba/tgbabddtranslatefactory.hh: New files.

2003-05-23  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* m4/gccwarn.m4: Do not use -Winline, this is inappropriate
	with STL.
	* src/ltlast/atomic_prop.cc, src/ltlvisit/lunabbrev.cc,
	src/ltlvisit/nenoform.cc: Include <cassert>.

2003-05-16  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/ltlvisit/dotty.cc: Rewrite to display formulae as
	graphs rather than trees, to show how nodes are shared.

	* src/ltlvisit/dump.hh (dump): Return the passed ostream.
	* src/ltlvisit/dump.cc (dump): Likewise.
	* src/ltlvisit/dotty.hh (dotty): Likewise.
	* src/ltlvisit/dotty.cc (dotty): Likewise.
	* src/ltlvisit/tostring.hh (to_string): Likewise.
	* src/ltlvisit/tostring.cc (to_string): Likewise.

	* src/ltlvisit/dump.hh (dump): Take a formula* as argument,
	not a formula&.  This is more homogeneous.
	* src/ltlvisit/dump.cc (dump): Likewise.
	* src/ltlvisit/dotty.hh (dotty): Likewise.
	* src/ltlvisit/dotty.cc (dotty): Likewise.
	* src/ltlvisit/tostring.hh (to_string): Likewise.
	* src/ltlvisit/tostring.cc (to_string): Likewise.
	* src/ltltest/readltl.cc, src/ltltest/equals.cc,
	src/ltltest/tostring.cc: Adjust usage.

	Check trivial multop equality at build time.  This makes the equal
	visitor useless, since two equals formulae will now share the same
	address.

	* src/ltlast/multop.hh (add_sorted): New function.
	(paircmp): New comparison functor.
	(map): Use paircmp, we want to compare the vectors' contents,
	not their addresses.
	* src/ltlast/multop.cc (add_sorted): New function.
	(add): Use it.
	* src/ltltest/equals.cc, src/ltltest/tostring.cc: Compare
	pointers instead of calling equal.
	* src/ltlvisit/equals.cc, src/ltlvisit/equals.hh: Delete.
	* src/ltlvisit/Makefile.am (libltlvisit_la_SOURCES): Remove
	equals.cc and equals.hh.
	* wrap/spot.i: Do not include equals.hh.

2003-05-15  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	Implement spot::ltl::destroy() and exercise it.

	* src/ltlast/atomic_prop.hh: Declare instance_count().
	* src/ltlast/binop.hh, src/ltlast/unop.hh, src/ltlast/multop.hh:
	Likewise.  Also, really inherit for ref_formula this time.
	* src/ltlast/atomic_prop.cc, src/ltlast/binop.cc,
	src/ltlast/unop.cc, src/ltlast/multop.cc: On destruction, suppress
	the instance from the instance map.  Implement instance_count().
	* src/ltlast/formula.cc, src/ltlast/formula.hh,
	src/ltlast/ref_formula.cc, src/ltlast/ref_formula.hh: Add virtual
	destructors.
	* src/ltlparse/ltlparse.yy: Recover from binary operators with
	missing right hand operand (the point is just to destroy the
	the left hand operand).
	* src/ltltest/equals.cc, src/ltltest/readltl.cc,
	src/ltltest/tostring.cc: Destroy used formulae.  Make sure
	instance_count()s are null are the end.
	* src/ltltest/parseerr.test: Adjust expected result, now
	that the parser lnows about missing right hand operands.
	* src/ltlvisit/destroy.hh, src/ltlvisit/destroy.cc,
	src/ltlvisit/postfix.hh, src/ltlvisit/postfix.cc: New files.
	* src/ltlvisit/Makefile.am (libltlvisit_la_SOURCES): Add them.
	* src/ltlvisit/lunabbrev.cc (Xor, Equiv): Clone formulae
	occurring twice in the rewritten expression.

	Massage the AST so that identical sub-formula share the same
	reference-counted formula*.  One can't call constructors for AST
	items anymore, everything need to be acquired through instance()
	class methods.

	* src/ltlast/formula.cc, src/ltlast/refformula.cc,
	src/ltlast/refformula.hh: New files.
	* src/ltlast/Makefile.am (libltlast_la_SOURCES): Add them.
	* src/ltlast/atomic_prop.cc, src/ltlast/atomic_prop.hh,
	src/ltlast/unop.cc, src/ltlast/unop.hh,
	src/ltlast/binop.cc, src/ltlast/binop.hh: Make the constructor
	and destructor protected.  Define a static function `instance()'
	to get an instance with specific argument.  Use a map called
	`instances' to store all known instances.  Inherit from
	ref_formula.
	* src/ltlast/constant.hh, src/ltlast/constant.cc: Protect
	the constructor and destructor.  Provide the false_instance()
	and true_instance() functions instead.
	* src/formula.hh (ref, unref, ref_, unref_): New methods.
	* src/ltlast/multop.cc, src/ltlast/multop.hh: Protect
	the constructor, destructor, as well as the add() method.
	Provides the instance(), and add() class methods instead.
	Store children_ as a pointer.
	* src/ltlenv/defaultenv.cc (require): Adjust to
	call atomic_prop::instance.
	* src/ltlparse/ltlparse.yy: Adjust to call instance() functions
	instead of constructors.
	* src/ltltest/Makefile.am (LDADD): Tweak library ordering.
	* src/ltlvisit/clone.hh (clone_visitor): Inherit from visitor,
	not const_visitor, and adjust all prototypes appropriately.
	* src/ltlvisit/clone.cc (clone_visitor): Likewise.
	Call ref() or instance() methods instead of copy constructors.
	* src/ltlvisit/equals.cc: Simplify atomic_prop and constant
	cases.
	* src/ltlvisit/lunabbrev.hh, src/ltlvisit/lunabbrev.cc,
	src/ltlvisit/tunabbrev.hh, src/ltlvisit/tunabbrev.cc,
	src/ltlvisit/nenoform.hh, src/ltlvisit/nenoform.cc: Use instance()
	methods instead of constructor.  Make these children of visitor, not
	const_visitor.
	* src/ltltest/readltl.c (main): Do not delete the formula.

	* src/ltlparse/ltlscan.ll (to_parse_size): Declare as size_t to
	remove a warning with newer versions of Flex.

	* src/ltlparse/ltlparse.yy (error_list, parse_environment, result):
	CVS Bison now supports %parse-param for the C++ skeleton; pass these
	variables as arguments to the Parser::Parser constructor instead of
	using globals.
	(parse): Adjust Parser::Parser call.

2003-05-12  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* src/ltlvisit/tostring.cc: Reindent and strip out superfluous
	spot::ltl:: prefixes.
	(to_string(formula)): New function.
	* src/ltlvisit/tostring.hh (to_string(formula)): Likewise.
	* src/ltltest/tostring.cc: Use this new to_string function to
	simplify.

2003-05-05  Alexandre Duret-Lutz  <aduret@src.lip6.fr>

	* m4/buddy.m4: New file.
	* Makefile.am (EXTRA_DIST): Add m4/buddy.m4.
	* configure.ac: Call AX_CHECK_BUDDY.

2003-04-30  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* src/ltlvisit/Makefile.am (lib_LTLIBRARIES): Rename as ...
	(noinst_LTLIBRARIES): ... this.
	* src/ltlenv/Makefile.am, src/ltlast/Makefile.am,
	src/ltlparse/Makefile.am: Likewise.
	* src/Makefile.am (lib_LTLIBRARIES, libspot_la_SOURCES,
	libspot_la_LIBADD): New variable.   Build a libspot.la library
	from all the sub-libraries.

	* m4/pypath.m4: New file.
	* Makefile.am (SUBDIRS): Add wrap.
	* wrap/Makefile.am: New file.
	* wrap/spot.i: New file.  Preliminary bindings for Python.
	* configure.ac: Call adl_CHECK_PYTHON and output wrap/Makefile.

2003-04-29  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* configure.ac: Call AC_PROG_LIBTOOL.
	* src/ltlast/Makefile.am, src/ltlenv/Makefile.am,
	src/ltlparse/Makefile.am, src/ltltest/Makefile.am,
	src/ltlvisit/Makefile.am: Adust to build libtool libraries.

	* src/ltlenv/defaultenv.hh: Do not include atomic_prop.hh here...
	* src/ltlenv/defaultenv.cc: ... but here.

	* src/ltltest/tostring.test: Simplify with set -e.  Move the
	description of the test ...
	* src/ltltest/tostring.cc: ... here, where it is actually coded.
	* src/ltltest/lunabbrev.test, src/ltltest/tunabbrev.test,
	src/ltltest/nenoform.test,  src/ltltest/tunenoform.test:
	Simplify with set -e.

	* configure.ac (AM_INIT_AUTOMAKE): Use nostdinc, to make
	sure we always use paths relative to src/ in src/'s
	subdirectories.

2003-04-28  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* src/ltlparse/Makefile.am (CXXFLAGS): Turn on GCC warnings
	now that CVS Bison is fixed.
	* src/ltlparse/ltlscan.ll: Use yyunput to shut up a GCC warning.

2003-04-24  Rachid REBIHA  <rebiha@nyx>

	* src/ltltest/tostring.test: New file.
	* src/ltltest/tostring.cc: New files.
	* src/ltlvisit/tostring.hh: From ast to string New files.
	* src/ltlvisit/tostring.cc: From ast to string New files.

2003-04-18  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* src/ltlparse/Makefile.am (EXTRA_DIST): Distribute ltlparse.yy.
	* src/ltlast/Makefile.am (libltlast_a_SOURCES): Add visitor.hh.

	* src/ltlast/atomic_prop.hh, src/ltlast/binop.hh,
	src/ltlast/constant.hh, src/ltlast/formula.hh,
	src/ltlast/multop.hh, src/ltlast/unop.hh, src/ltlast/visitor.hh,
	src/ltlenv/defaultenv.hh, src/ltlenv/environment.hh,
	src/ltlparse/public.hh, src/ltlvisit/clone.hh,
	src/ltlvisit/dotty.hh, src/ltlvisit/dump.hh,
	src/ltlvisit/equals.hh, src/ltlvisit/lunabbrev.hh,
	src/ltlvisit/nenoform.hh, src/ltlvisit/tunabbrev.hh: Add
	Doxygen comments.
	* src/visitor.hh: Do not use const_sel.  This clarifies
	the code and helps Doxygen.

	* configure.ac: Output doc/Doxyfile and doc/Makefile.
	* doc/Makefile.am, doc/Doxyfile.in: New files.
	* Makefile.am (SUBDIRS): Add doc.

	* src/ltlparse/ltlscan.ll: Recognize && and ||.
	* src/ltltest/parse.test, src/ltltest/parseerr.test,
	src/ltltest/equals.test: Use these operators..

2003-04-17  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* src/ltltest/readltl.cc, src/ltltest/equals.cc: Cosmetics.

	* src/ltlenv/environment.hh (require): Return a formula, not
	an atomic_prop.
	* src/ltlast/atomic_prop.hh (atomic_prop): New argument env.
	(environment_): New member.
	(env): New method.
	* src/ltlast/atomic_prop.cc (atomic_prop, env): Likewise.
	* src/ltlenv/defaultenv.cc (require): Pass *this as the
	environment argument to atomic_prop.
	* src/ltlvisit/clone.cc (visit(const atomic_prop*)): Also copy
	the environment.
	* src/ltlvisit/nenoform.cc (visit(const atomic_prop*)): Likewise.

	* configure.ac: Output src/ltlenv/Makefile.
	* src/ltlenv/Makefile.am, src/ltlenv/defaultenv.cc,
	src/ltlenv/defaultenv.hh, src/ltlenv/environment.hh: New files.
	* src/ltlparse/public.hh (parse): Take an environment as third
	argument.
	* src/ltlparse/ltlparse.yy (ATOMIC_PROP, parse): Require the
	atomic proposition via the environment.
	* src/ltltest/readltl.cc (main): Adjust the call to parse().
	* src/ltltest/Makefile.am (LDADD): Add ../ltlenv/libltlenv.a.

	* src/ltlvisit/clone.hh, src/ltlvisit/clone.cc: New files.
	* src/ltlvisit/Makefile.am (libltlvisit_a_SOURCES): Add them.
	* src/ltlvisit/lunabbrev.hh, src/ltlvisit/lunabbrev.cc: Inherit
	from clone_visitor and remove all useless methods (now inherited).

	* src/ltlvisit/nenoform.hh, src/ltlvisit/nenoform.cc: New files.
	* src/ltlvisit/Makefile.am (libltlvisit_a_SOURCES): Add them.
	* src/ltltest/equals.cc (main) [NENOFORM]: Call negative_normal_form.
	* src/ltltest/nenoform.test, src/ltltest/tunenoform.test: New files.
	* src/ltltest/Makefile.am (check_PROGRAMS): Add nenoform and
	tunenoform.
	(nenoform_SOURCES, nenoform_CPPFLAGS, tunenoform_SOURCES,
	tunenoform_CPPFLAGS): New variables.
	(TESTS): Add nenoform.test and tunenoform.test.

	* src/ltlvisit/lunabbrev.hh: Fix include guard.

2003-04-16  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* src/ltlvisit/tunabbrev.cc, src/ltlvisit/tunabbrev.hh: New files.
	* src/ltlvisit/Makefile.am (libltlvisit_a_SOURCES): Add them.
	* src/ltltest/tunabbrev.test: New file.
	* src/ltltest/lunabbrev.test: Fix comment.
	* src/ltltest/Makefile.am (TESTS): Add tunabbrev.test.
	(check_PROGRAMS): Add tunabbrev.
	(tunabbrev_SOURCES, tunabbrev_CPPFLAGS): New variables.
	* src/ltltest/equals.cc (main) [TUNABBREV]: Call unabbreviate_ltl.
	* src/ltlvisit/lunabbrev.hh (unabbreviate_logic_visitor::recurse):
	New virtual function.
	* src/ltlvisit/lunabbrev.cc (unabbreviate_logic_visitor::recurse):
	Likewise.
	(unabbreviate_logic_visitor::visit): Use it instead of calling
	unabbreviate_logic directly.

	* src/ltlvisit/lunabbrev.hh: Add missing include guard.

	* src/ltlvisit/lunabbrev.cc, src/ltlvisit/lunabbrev.hh: New files.
	* src/ltlvisit/Makefile.am (libltlvisit_a_SOURCES): Add them.
	* src/ltlast/multop.cc (multop::multop(type)): New constructor.
	* src/ltlast/multop.hh (multop::multop(type)): New constructor.
	* src/ltltest/lunabbrev.test: New file.
	* src/ltltest/Makefile.am (TESTS): Add lunabbrev.test.
	(check_PROGRAMS): Add lunabbrev.
	(lunabbrev_SOURCES, lunabbrev_CPPFLAGS): New variables.
	* src/ltltest/equals.cc (main) [LUNABBREV]: Call unabbreviate_logic.

	* src/ltltest/equals.test (check0, check1): Remove. Use check 0, and
	check 1 instead.

	* src/ltlast/formulae.hh: Rename as ...
	* src/ltlast/formula.hh: ... this.
	* src/ltlast/Makefile.am (libltlast_a_SOURCES): Adjust.
	* src/ltlast/formula.hh (formulae): Rename as ...
	(formula): ... this.
	Adjust all uses.

	* src/ltlparse/public.hh (format_parse_errors): New function.
	* src/ltlparse/fmterror.cc: New file.
	* src/ltlparse/Makefile.am (libltlparse_a_SOURCES): Add fmterror.cc.
	* src/ltltests/equals.cc, src/ltltests/readltl.cc: Simplify using
	format_parse_errors.

	* src/ltlvisit/equals.cc, src/ltlvisit/equals.hh: New files.
	* src/ltlvisit/Makefile.am (libltlvisit_a_SOURCES): Add equals.hh
	and equals.cc.
	* src/ltltest/equals.cc, src/ltltest/equals.test: New files.
	* src/ltltest/Makefile.am (check_PROGRAMS): Add equals.
	(equals_SOURCES): New variable.
	(TESTS): Add equals.test.

	* src/ltlast/multop.cc (multop::multop): Use multop::add.
	(multop::add): If the formulae we add is itself a multop for the
	same operator, merge its children with ours.
	* src/ltltest/parseerr.test: Add two tests for multop merging.

2003-04-15  Alexandre DURET-LUTZ  <aduret@src.lip6.fr>

	* src/ltlast/formulae.hh (formulae::equals): Remove.
	* src/ltlast/unop.hh (unop::equals): Remove.
	* src/ltlast/unop.cc (unop::equals): Remove.
	* src/ltlast/binop.hh (binop::equals): Remove.
	* src/ltlast/binop.cc (binop::equals): Remove.
	* src/ltlast/multop.hh (multop::equals): Remove.
	* src/ltlast/multop.cc (multop::equals): Remove.
	* src/ltlast/atomic_prop.hh (atomic_prop::equals): Remove.
	* src/ltlast/atomic_prop.cc (atomic_prop::equals): Remove.
	* src/ltlast/constant.hh (constant::equals): Remove.
	* src/ltlast/constant.cc (constant::equals): Remove.

	* HACKING, Makefile.am, configure.ac, m4/gccwarn.m4,
	src/Makefile.am, src/ltlast/Makefile.am, src/ltlast/allnodes.hh,
	src/ltlast/atomic_prop.cc, src/ltlast/atomic_prop.hh,
	src/ltlast/binop.cc, src/ltlast/binop.hh, src/ltlast/constant.cc,
	src/ltlast/constant.hh, src/ltlast/formulae.hh,
	src/ltlast/multop.cc, src/ltlast/multop.hh, src/ltlast/predecl.hh,
	src/ltlast/unop.cc, src/ltlast/unop.hh, src/ltlast/visitor.hh,
	src/ltlparse/Makefile.am, src/ltlparse/ltlparse.yy,
	src/ltlparse/ltlscan.ll, src/ltlparse/parsedecl.hh,
	src/ltlparse/public.hh, src/ltlvisit/Makefile.am,
	src/ltlvisit/dotty.cc, src/ltlvisit/dotty.hh,
	src/ltlvisit/dump.cc, src/ltlvisit/dump.hh,
	src/ltlvisit/rewrite.cc, src/ltlvisit/rewrite.hh,
	src/ltltest/Makefile.am, src/ltltest/defs.in, src/ltltest/readltl.cc,
	src/ltltest/parse.test, src/ltltest/parseerr.test,
	src/misc/Makefile.am, src/misc/const_sel.hh: New files.