Now that states have a complete set of members, the linked list of

[bison.git] / ChangeLog

2001-12-10  Akim Demaille  <akim@epita.fr>

	Now that states have a complete set of members, the linked list of
	shifts is useless: just fill directly the state's shifts member.

	* src/state.h (shifts): Remove the `next' member.
	* src/LR0.c (first_state, last_state): Remove.
	Adjust the callers.
	(augment_automaton): Don't look for the shifts that must be added
	a shift on EOF: it is those of the state we looked for!  But now,
	since shifts are attached, it is no longer needed to looking
	merely by its id: its number.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/LR0.c (augment_automaton): Better variable locality.
	Remove an impossible branch: if there is a state corresponding to
	the start symbol being shifted, then there is shift for the start
	symbol from the initial state.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/LR0.c (augment_automaton): Call `insert_eof_shifting_state'
	only when appropriate: when insert_start_shifting_state' is not
	invoked.
	* tests/regression.at (Rule Line Numbers): Adjust.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/LR0.c (augment_automaton): Now that all states have shifts,
	merge the two cases addition shifts to the initial state.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/lalr.c (set_state_table): Move to...
	* src/LR0.c: here.
	* src/lalr.c (lalr): Don't call it...
	* src/LR0.c (generate_states): do it.
	* src/LR0.h (first_state): Remove, only the table is used.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/LR0.h (first_shift, first_reduction): Remove.
	* src/lalr.c: Don't use first_shift: find shifts through the
	states.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/LR0.c: Attach shifts to states as soon as they are
	computed.
	* src/lalr.c (set_state_table): Instead of assigning shifts to
	state, just assert that the mapping was properly done.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/LR0.c (insert_start_shift): Rename as...
	(insert_start_shifting_state): this.
	(insert_eof_shifting_state, insert_accepting_state): New.
	(augment_automaton): Adjust.
	Better locality of the variables.
	When looking if the start_symbol is shifted from the initial
	state, using `while (... symbol != start_symbol ...)' sounds
	better than `while (... symbol < start_symbol ...)': If fail
	to see how the order between symbols could be relevant!

2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/getargs.h: Don't declare `spec_name_prefix' and
	`spec_file_prefix', declared by src/files.h.
	* src/files.c, src/files.h: Default for spec_name_prefix is "yy".
	* src/muscle_tab.c (muscle_init): Default prefix to NULL.
	* src/output.c (prepare): Adjust.
	* src/reader.c (symbols_output): Likewise.
	* src/vmsgetargs.c: Vaguely adjust, but who cares?

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/muscle_tab.c (muscle_init): NULL is a better default than
	`"0"'.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/reader.c (reader): Calling symbols_output once is enough.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	Now that states have a complete set of members, the linked list of
	reductions is useless: just fill directly the state's reductions
	member.

	* src/state.h (struct reductions): Remove member `number' and
	`next'.
	* src/LR0.c (first_reduction, last_reduction): Remove.
	(save_reductions): Don't link the new reductions, store them in
	this_state.
	* src/lalr.c (set_state_table): No need to attach reductions to
	states, it's already done.
	* src/output.c (output_actions): No longer free the shifts, then
	the reductions, then the states: free all the states and their
	members.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/options.c (OPTN, DRTV, BOTH): New.
	(option_table): Use them.

	
	* src/muscle_tab.c: Don't include xalloc.h and string.h: that's
	the job of system.h.
	* src/options.c: Don't include stdio.h and xalloc.h for the same
	reasons.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	* src/output.c (output, prepare): Make sure the values of the
	muscles `action' and `prologue' are 0-terminated.

2001-12-10  Akim Demaille  <akim@epita.fr>

	Clean up GCC warnings.

	* src/reader.c (copy_action): `buf' is not used.
	(parse_skel_decl): Be static.
	* src/muscle_tab.c (mhash1, mhash2, muscle_insert): Preserve `const'.
	* src/options.h (create_long_option_table): Have a real prototype.
	* lib/hash.c, lib/hash.h (hash_insert, hash_insert_at, hash_delete)
	(hash_delete_at): Return const void *.
	Adjust casts to preserve the const.

2001-12-10  Akim Demaille  <akim@epita.fr>

	* configure.in: Require 2.52g.
	M4 is not needed, but AUTOM4TE is.
	* m4/m4.m4: Remove.
	* tests/Makefile.am: Adjust.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	One structure for states is enough, even though theoretically
	there are LR(0) states and LALR(1) states.

	* src/lalr.h (state_t): Remove.
	(state_table): Be state_t **, not state_t *.
	* src/state.h (core, CORE_ALLOC): Rename as...
	(state_t, STATE_ALLOC): this.
	Add the LALR(1) members: shifts, reductions, errs.
	* src/LR0.c (state_table): Rename as...
	(state_hash): this, to avoid name clashes with the global
	`state_table'.
	* src/print_graph.c, src/LR0.c, src/LR0.h, src/conflicts.c
	* src/lalr.c, src/lalr.h, src/output.c, src/print.c: Adjust.

	
2001-12-10  Akim Demaille  <akim@epita.fr>

	Bison dumps core on bash.y.
	Reported by Pascal Bart.

	* src/warshall.c (bitmatrix_print): New.
	(TC): Use it.
	When performing a transitive closure R(i, j) && R(j, k) => R(i,	k),
	j must be the outer loop.
	* tests/regression.at (Broken Closure): New.

2001-12-05  Akim Demaille  <akim@epita.fr>

	* tests/atlocal.in (CPPFLAGS): Do not leave a space between -I and
	its argument.