/* Print information on generated parser, for bison,
- Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
+
+ Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
+#include <config.h>
#include "system.h"
-#include "quotearg.h"
-#include "files.h"
-#include "symtab.h"
-#include "gram.h"
+
+#include <bitset.h>
+#include <quotearg.h>
+
#include "LR0.h"
-#include "lalr.h"
+#include "closure.h"
#include "conflicts.h"
+#include "files.h"
#include "getargs.h"
-#include "state.h"
-#include "reader.h"
+#include "gram.h"
+#include "lalr.h"
#include "print.h"
+#include "reader.h"
#include "reduce.h"
-#include "closure.h"
-#include "bitset.h"
+#include "state.h"
+#include "symtab.h"
-static bitset shiftset;
-static bitset lookaheadset;
+static bitset shift_set;
+static bitset look_ahead_set;
#if 0
static void
`--------------------------------*/
static void
-print_core (FILE *out, state_t *state)
+print_core (FILE *out, state *s)
{
- int i;
- item_number_t *sitems = state->items;
- int snritems = state->nitems;
- symbol_t *previous_lhs = NULL;
+ size_t i;
+ item_number *sitems = s->items;
+ size_t snritems = s->nitems;
+ symbol *previous_lhs = NULL;
/* Output all the items of a state, not only its kernel. */
if (report_flag & report_itemsets)
for (i = 0; i < snritems; i++)
{
- item_number_t *sp;
- item_number_t *sp1;
- int rule;
+ item_number *sp;
+ item_number *sp1;
+ rule_number r;
sp1 = sp = ritem + sitems[i];
while (*sp >= 0)
sp++;
- rule = item_number_as_rule_number (*sp);
+ r = item_number_as_rule_number (*sp);
- rule_lhs_print (&rules[rule], previous_lhs, out);
- previous_lhs = rules[rule].lhs;
+ rule_lhs_print (&rules[r], previous_lhs, out);
+ previous_lhs = rules[r].lhs;
- for (sp = rules[rule].rhs; sp < sp1; sp++)
+ for (sp = rules[r].rhs; sp < sp1; sp++)
fprintf (out, " %s", symbols[*sp]->tag);
fputs (" .", out);
for (/* Nothing */; *sp >= 0; ++sp)
fprintf (out, " %s", symbols[*sp]->tag);
- /* Display the lookaheads? */
- if (report_flag & report_lookaheads)
- state_rule_lookaheads_print (state, &rules[rule], out);
+ /* Display the look-ahead tokens? */
+ if (report_flag & report_look_ahead_tokens)
+ state_rule_look_ahead_tokens_print (s, &rules[r], out);
fputc ('\n', out);
}
}
-/*----------------------------------------------------------------.
-| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of STATE on |
-| OUT. |
-`----------------------------------------------------------------*/
+/*------------------------------------------------------------.
+| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of S on |
+| OUT. |
+`------------------------------------------------------------*/
static void
-print_transitions (state_t *state, FILE *out, bool display_transitions_p)
+print_transitions (state *s, FILE *out, bool display_transitions_p)
{
- transitions_t *transitions = state->transitions;
+ transitions *trans = s->transitions;
size_t width = 0;
int i;
- /* Compute the width of the lookaheads column. */
- for (i = 0; i < transitions->num; i++)
- if (!TRANSITION_IS_DISABLED (transitions, i)
- && TRANSITION_IS_SHIFT (transitions, i) == display_transitions_p)
+ /* Compute the width of the look-ahead token column. */
+ for (i = 0; i < trans->num; i++)
+ if (!TRANSITION_IS_DISABLED (trans, i)
+ && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
{
- symbol_t *symbol = symbols[TRANSITION_SYMBOL (transitions, i)];
- max_length (&width, symbol->tag);
+ symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+ max_length (&width, sym->tag);
}
/* Nothing to report. */
fputc ('\n', out);
width += 2;
- /* Report lookaheads and shifts. */
- for (i = 0; i < transitions->num; i++)
- if (!TRANSITION_IS_DISABLED (transitions, i)
- && TRANSITION_IS_SHIFT (transitions, i) == display_transitions_p)
+ /* Report look-ahead tokens and shifts. */
+ for (i = 0; i < trans->num; i++)
+ if (!TRANSITION_IS_DISABLED (trans, i)
+ && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
{
- symbol_t *symbol = symbols[TRANSITION_SYMBOL (transitions, i)];
- const char *tag = symbol->tag;
- state_t *state1 = transitions->states[i];
+ symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+ const char *tag = sym->tag;
+ state *s1 = trans->states[i];
int j;
fprintf (out, " %s", tag);
for (j = width - strlen (tag); j > 0; --j)
fputc (' ', out);
if (display_transitions_p)
- fprintf (out, _("shift, and go to state %d\n"), state1->number);
+ fprintf (out, _("shift, and go to state %d\n"), s1->number);
else
- fprintf (out, _("go to state %d\n"), state1->number);
+ fprintf (out, _("go to state %d\n"), s1->number);
}
}
-/*------------------------------------------------------------.
-| Report the explicit errors of STATE raised from %nonassoc. |
-`------------------------------------------------------------*/
+/*--------------------------------------------------------.
+| Report the explicit errors of S raised from %nonassoc. |
+`--------------------------------------------------------*/
static void
-print_errs (FILE *out, state_t *state)
+print_errs (FILE *out, state *s)
{
- errs_t *errp = state->errs;
+ errs *errp = s->errs;
size_t width = 0;
int i;
- /* Compute the width of the lookaheads column. */
+ /* Compute the width of the look-ahead token column. */
for (i = 0; i < errp->num; ++i)
if (errp->symbols[i])
max_length (&width, errp->symbols[i]->tag);
fputc ('\n', out);
width += 2;
- /* Report lookaheads and errors. */
+ /* Report look-ahead tokens and errors. */
for (i = 0; i < errp->num; ++i)
if (errp->symbols[i])
{
}
-/*----------------------------------------------------------.
-| Return the default rule of this STATE if it has one, NULL |
-| otherwise. |
-`----------------------------------------------------------*/
+/*-------------------------------------------------------------.
+| Return the default rule of S if it has one, NULL otherwise. |
+`-------------------------------------------------------------*/
-static rule_t *
-state_default_rule (state_t *state)
+static rule *
+state_default_rule (state *s)
{
- reductions_t *redp = state->reductions;
- rule_t *default_rule = NULL;
+ reductions *reds = s->reductions;
+ rule *default_rule = NULL;
int cmax = 0;
int i;
- /* No need for a lookahead. */
- if (state->consistent)
- return redp->rules[0];
+ /* No need for a look-ahead. */
+ if (s->consistent)
+ return reds->rules[0];
- /* 1. Each reduction is possibly masked by the lookaheads on which
+ /* 1. Each reduction is possibly masked by the look-ahead tokens on which
we shift (S/R conflicts)... */
- bitset_zero (shiftset);
+ bitset_zero (shift_set);
{
- transitions_t *transitions = state->transitions;
- FOR_EACH_SHIFT (transitions, i)
+ transitions *trans = s->transitions;
+ FOR_EACH_SHIFT (trans, i)
{
/* If this state has a shift for the error token, don't use a
default rule. */
- if (TRANSITION_IS_ERROR (transitions, i))
+ if (TRANSITION_IS_ERROR (trans, i))
return NULL;
- bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i));
+ bitset_set (shift_set, TRANSITION_SYMBOL (trans, i));
}
}
- /* 2. Each reduction is possibly masked by the lookaheads on which
+ /* 2. Each reduction is possibly masked by the look-ahead tokens on which
we raise an error (due to %nonassoc). */
{
- errs_t *errp = state->errs;
+ errs *errp = s->errs;
for (i = 0; i < errp->num; i++)
if (errp->symbols[i])
- bitset_set (shiftset, errp->symbols[i]->number);
+ bitset_set (shift_set, errp->symbols[i]->number);
}
- for (i = 0; i < state->nlookaheads; ++i)
+ for (i = 0; i < reds->num; ++i)
{
int count = 0;
- /* How many non-masked lookaheads are there for this reduction?
- */
- bitset_andn (lookaheadset, state->lookaheads[i], shiftset);
- count = bitset_count (lookaheadset);
+ /* How many non-masked look-ahead tokens are there for this
+ reduction? */
+ bitset_andn (look_ahead_set, reds->look_ahead_tokens[i], shift_set);
+ count = bitset_count (look_ahead_set);
if (count > cmax)
{
cmax = count;
- default_rule = state->lookaheads_rule[i];
+ default_rule = reds->rules[i];
}
/* 3. And finally, each reduction is possibly masked by previous
reductions (in R/R conflicts, we keep the first reductions).
*/
- bitset_or (shiftset, shiftset, state->lookaheads[i]);
+ bitset_or (shift_set, shift_set, reds->look_ahead_tokens[i]);
}
return default_rule;
}
-/*--------------------------------------------------------------------.
-| Report a reduction of RULE on LOOKAHEADS (which can be `default'). |
-| If not ENABLED, the rule is masked by a shift or a reduce (S/R and |
-| R/R conflicts). |
-`--------------------------------------------------------------------*/
+/*--------------------------------------------------------------------------.
+| Report a reduction of RULE on LOOK_AHEAD_TOKEN (which can be `default'). |
+| If not ENABLED, the rule is masked by a shift or a reduce (S/R and |
+| R/R conflicts). |
+`--------------------------------------------------------------------------*/
static void
print_reduction (FILE *out, size_t width,
- const char *lookahead,
- rule_t *rule, bool enabled)
+ const char *look_ahead_token,
+ rule *r, bool enabled)
{
int j;
- fprintf (out, " %s", lookahead);
- for (j = width - strlen (lookahead); j > 0; --j)
+ fprintf (out, " %s", look_ahead_token);
+ for (j = width - strlen (look_ahead_token); j > 0; --j)
fputc (' ', out);
if (!enabled)
fputc ('[', out);
- if (rule->number)
- fprintf (out, _("reduce using rule %d (%s)"),
- rule->number, rule->lhs->tag);
+ if (r->number)
+ fprintf (out, _("reduce using rule %d (%s)"), r->number, r->lhs->tag);
else
fprintf (out, _("accept"));
if (!enabled)
}
-/*----------------------------------------------------.
-| Report on OUT the reduction actions of this STATE. |
-`----------------------------------------------------*/
+/*-------------------------------------------.
+| Report on OUT the reduction actions of S. |
+`-------------------------------------------*/
static void
-print_reductions (FILE *out, state_t *state)
+print_reductions (FILE *out, state *s)
{
- transitions_t *transitions = state->transitions;
- reductions_t *redp = state->reductions;
- rule_t *default_rule = NULL;
+ transitions *trans = s->transitions;
+ reductions *reds = s->reductions;
+ rule *default_rule = NULL;
size_t width = 0;
int i, j;
- if (redp->num == 0)
+ if (reds->num == 0)
return;
- default_rule = state_default_rule (state);
+ default_rule = state_default_rule (s);
- bitset_zero (shiftset);
- FOR_EACH_SHIFT (transitions, i)
- bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i));
+ bitset_zero (shift_set);
+ FOR_EACH_SHIFT (trans, i)
+ bitset_set (shift_set, TRANSITION_SYMBOL (trans, i));
- /* Compute the width of the lookaheads column. */
+ /* Compute the width of the look-ahead token column. */
if (default_rule)
width = strlen (_("$default"));
- for (i = 0; i < ntokens; i++)
- {
- int count = bitset_test (shiftset, i);
- for (j = 0; j < state->nlookaheads; ++j)
- if (bitset_test (state->lookaheads[j], i))
- {
- if (count == 0)
- {
- if (state->lookaheads_rule[j] != default_rule)
+ if (reds->look_ahead_tokens)
+ for (i = 0; i < ntokens; i++)
+ {
+ bool count = bitset_test (shift_set, i);
+
+ for (j = 0; j < reds->num; ++j)
+ if (bitset_test (reds->look_ahead_tokens[j], i))
+ {
+ if (! count)
+ {
+ if (reds->rules[j] != default_rule)
+ max_length (&width, symbols[i]->tag);
+ count = true;
+ }
+ else
+ {
max_length (&width, symbols[i]->tag);
- count++;
- }
- else
- {
- max_length (&width, symbols[i]->tag);
- }
- }
- }
+ }
+ }
+ }
/* Nothing to report. */
if (!width)
fputc ('\n', out);
width += 2;
- /* Report lookaheads (or $default) and reductions. */
- for (i = 0; i < ntokens; i++)
- {
- int defaulted = 0;
- int count = bitset_test (shiftset, i);
+ /* Report look-ahead tokens (or $default) and reductions. */
+ if (reds->look_ahead_tokens)
+ for (i = 0; i < ntokens; i++)
+ {
+ bool defaulted = false;
+ bool count = bitset_test (shift_set, i);
- for (j = 0; j < state->nlookaheads; ++j)
- if (bitset_test (state->lookaheads[j], i))
- {
- if (count == 0)
- {
- if (state->lookaheads_rule[j] != default_rule)
- print_reduction (out, width,
- symbols[i]->tag,
- state->lookaheads_rule[j], TRUE);
- else
- defaulted = 1;
- count++;
- }
- else
- {
- if (defaulted)
+ for (j = 0; j < reds->num; ++j)
+ if (bitset_test (reds->look_ahead_tokens[j], i))
+ {
+ if (! count)
+ {
+ if (reds->rules[j] != default_rule)
+ print_reduction (out, width,
+ symbols[i]->tag,
+ reds->rules[j], true);
+ else
+ defaulted = true;
+ count = true;
+ }
+ else
+ {
+ if (defaulted)
+ print_reduction (out, width,
+ symbols[i]->tag,
+ default_rule, true);
+ defaulted = false;
print_reduction (out, width,
symbols[i]->tag,
- default_rule, TRUE);
- defaulted = 0;
- print_reduction (out, width,
- symbols[i]->tag,
- state->lookaheads_rule[j], FALSE);
- }
- }
- }
+ reds->rules[j], false);
+ }
+ }
+ }
if (default_rule)
print_reduction (out, width,
- _("$default"), default_rule, TRUE);
+ _("$default"), default_rule, true);
}
/*--------------------------------------------------------------.
| Report on OUT all the actions (shifts, gotos, reductions, and |
-| explicit erros from %nonassoc) of STATE. |
+| explicit erros from %nonassoc) of S. |
`--------------------------------------------------------------*/
static void
-print_actions (FILE *out, state_t *state)
+print_actions (FILE *out, state *s)
{
/* Print shifts. */
- print_transitions (state, out, TRUE);
- print_errs (out, state);
- print_reductions (out, state);
+ print_transitions (s, out, true);
+ print_errs (out, s);
+ print_reductions (out, s);
/* Print gotos. */
- print_transitions (state, out, FALSE);
+ print_transitions (s, out, false);
}
-/*--------------------------------------.
-| Report all the data on STATE on OUT. |
-`--------------------------------------*/
+/*----------------------------------.
+| Report all the data on S on OUT. |
+`----------------------------------*/
static void
-print_state (FILE *out, state_t *state)
+print_state (FILE *out, state *s)
{
fputs ("\n\n", out);
- fprintf (out, _("state %d"), state->number);
+ fprintf (out, _("state %d"), s->number);
fputc ('\n', out);
- print_core (out, state);
- print_actions (out, state);
- if ((report_flag & report_solved_conflicts)
- && state->solved_conflicts)
- fputs (state->solved_conflicts, out);
+ print_core (out, s);
+ print_actions (out, s);
+ if ((report_flag & report_solved_conflicts) && s->solved_conflicts)
+ {
+ fputc ('\n', out);
+ fputs (s->solved_conflicts, out);
+ }
}
\f
/*-----------------------------------------.
static void
print_grammar (FILE *out)
{
- symbol_number_t i;
+ symbol_number i;
char buffer[90];
int column = 0;
if (token_translations[i] != undeftoken->number)
{
const char *tag = symbols[token_translations[i]]->tag;
- rule_number_t r;
- item_number_t *rhsp;
+ rule_number r;
+ item_number *rhsp;
buffer[0] = 0;
column = strlen (tag);
for (i = ntokens; i < nsyms; i++)
{
int left_count = 0, right_count = 0;
- rule_number_t r;
+ rule_number r;
const char *tag = symbols[i]->tag;
for (r = 0; r < nrules; r++)
{
- item_number_t *rhsp;
+ item_number *rhsp;
if (rules[r].lhs->number == i)
left_count++;
for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
sprintf (buffer + strlen (buffer), _(" on right:"));
for (r = 0; r < nrules; r++)
{
- item_number_t *rhsp;
+ item_number *rhsp;
for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
if (item_number_as_symbol_number (*rhsp) == i)
{
void
print_results (void)
{
- state_number_t i;
+ state_number i;
/* We used to use just .out if SPEC_NAME_PREFIX (-p) was used, but
that conflicts with Posix. */
FILE *out = xfopen (spec_verbose_file, "w");
reduce_output (out);
+ grammar_rules_partial_print (out,
+ _("Rules never reduced"), rule_never_reduced_p);
conflicts_output (out);
print_grammar (out);
if (report_flag & report_itemsets)
new_closure (nritems);
/* Storage for print_reductions. */
- shiftset = bitset_create (ntokens, BITSET_FIXED);
- lookaheadset = bitset_create (ntokens, BITSET_FIXED);
+ shift_set = bitset_create (ntokens, BITSET_FIXED);
+ look_ahead_set = bitset_create (ntokens, BITSET_FIXED);
for (i = 0; i < nstates; i++)
print_state (out, states[i]);
- bitset_free (shiftset);
- bitset_free (lookaheadset);
+ bitset_free (shift_set);
+ bitset_free (look_ahead_set);
if (report_flag & report_itemsets)
free_closure ();
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