X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4bc30f78dc54b245896dd04724019b9b767a7b33..595284e9d0277517bac8f3fc7bcdd529d97aa6f9:/src/print.c
diff --git a/src/print.c b/src/print.c
index 2c2b8420..e3795a94 100644
--- a/src/print.c
+++ b/src/print.c
@@ -1,35 +1,44 @@
/* Print information on generated parser, for bison,
- Copyright 1984, 1986, 1989, 2000, 2001 Free Software Foundation, Inc.
+
+ Copyright (C) 1984, 1986, 1989, 2000-2005, 2007, 2009-2012 Free
+ Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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. */
-
+ along with this program. If not, see . */
+#include
#include "system.h"
-#include "files.h"
-#include "gram.h"
+
+#include
+
#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 "muscle-tab.h"
#include "print.h"
+#include "reader.h"
#include "reduce.h"
+#include "state.h"
+#include "symtab.h"
+#include "tables.h"
+
+static bitset no_reduce_set;
#if 0
static void
@@ -40,278 +49,449 @@ print_token (int extnum, int token)
#endif
+
+/*---------------------------------------.
+| *WIDTH := max (*WIDTH, strlen (STR)). |
+`---------------------------------------*/
+
+static void
+max_length (size_t *width, const char *str)
+{
+ size_t len = strlen (str);
+ if (len > *width)
+ *width = len;
+}
+
/*--------------------------------.
| Report information on a state. |
`--------------------------------*/
static void
-print_core (FILE *out, int state)
+print_core (FILE *out, state *s)
{
- int i;
- core *statep = state_table[state].state;
+ size_t i;
+ item_number *sitems = s->items;
+ size_t snritems = s->nitems;
+ symbol *previous_lhs = NULL;
- if (!statep->nitems)
+ /* Output all the items of a state, not only its kernel. */
+ if (report_flag & report_itemsets)
+ {
+ closure (sitems, snritems);
+ sitems = itemset;
+ snritems = nitemset;
+ }
+
+ if (!snritems)
return;
- for (i = 0; i < statep->nitems; i++)
+ fputc ('\n', out);
+
+ for (i = 0; i < snritems; i++)
{
- short *sp;
- short *sp1;
- int rule;
+ item_number *sp;
+ item_number *sp1;
+ rule_number r;
- sp1 = sp = ritem + statep->items[i];
+ sp1 = sp = ritem + sitems[i];
- while (*sp > 0)
- sp++;
+ while (*sp >= 0)
+ sp++;
- rule = -(*sp);
- fprintf (out, " %s -> ", tags[rule_table[rule].lhs]);
+ r = item_number_as_rule_number (*sp);
- for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++)
- fprintf (out, "%s ", tags[*sp]);
+ rule_lhs_print (&rules[r], previous_lhs, out);
+ previous_lhs = rules[r].lhs;
- fputc ('.', out);
+ 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);
- for (/* Nothing */; *sp > 0; ++sp)
- fprintf (out, " %s", tags[*sp]);
+ /* Display the lookahead tokens? */
+ if (report_flag & report_lookahead_tokens
+ && item_number_is_rule_number (*sp1))
+ state_rule_lookahead_tokens_print (s, &rules[r], out);
- fprintf (out, _(" (rule %d)"), rule);
fputc ('\n', out);
}
+}
+
+
+/*------------------------------------------------------------.
+| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of S on |
+| OUT. |
+`------------------------------------------------------------*/
+
+static void
+print_transitions (state *s, FILE *out, bool display_transitions_p)
+{
+ transitions *trans = s->transitions;
+ size_t width = 0;
+ int i;
+
+ /* Compute the width of the lookahead token column. */
+ for (i = 0; i < trans->num; i++)
+ if (!TRANSITION_IS_DISABLED (trans, i)
+ && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
+ {
+ symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+ max_length (&width, sym->tag);
+ }
+
+ /* Nothing to report. */
+ if (!width)
+ return;
fputc ('\n', out);
+ width += 2;
+
+ /* Report lookahead 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 *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"), s1->number);
+ else
+ fprintf (out, _("go to state %d\n"), s1->number);
+ }
}
+
+/*--------------------------------------------------------.
+| Report the explicit errors of S raised from %nonassoc. |
+`--------------------------------------------------------*/
+
static void
-print_actions (FILE *out, int state)
+print_errs (FILE *out, state *s)
{
+ errs *errp = s->errs;
+ size_t width = 0;
int i;
- int k;
- int state1;
- int symbol;
- shifts *shiftp;
- errs *errp;
- reductions *redp;
- int rule;
-
- shiftp = state_table[state].shift_table;
- redp = state_table[state].reduction_table;
- errp = err_table[state];
-
- if (!shiftp && !redp)
- {
- if (final_state == state)
- fprintf (out, _(" $default\taccept\n"));
- else
- fprintf (out, _(" NO ACTIONS\n"));
- return;
- }
- if (shiftp)
- {
- k = shiftp->nshifts;
-
- for (i = 0; i < k; i++)
- {
- if (!shiftp->shifts[i])
- continue;
- state1 = shiftp->shifts[i];
- symbol = state_table[state1].accessing_symbol;
- /* The following line used to be turned off. */
- if (ISVAR (symbol))
- break;
- if (symbol == 0) /* I.e. strcmp(tags[symbol],"$")==0 */
- fprintf (out,
- _(" $ \tgo to state %d\n"), state1);
- else
- fprintf (out,
- _(" %-4s\tshift, and go to state %d\n"),
- tags[symbol], state1);
- }
-
- if (i > 0)
- fputc ('\n', out);
- }
+ /* Compute the width of the lookahead token column. */
+ for (i = 0; i < errp->num; ++i)
+ if (errp->symbols[i])
+ max_length (&width, errp->symbols[i]->tag);
+
+ /* Nothing to report. */
+ if (!width)
+ return;
+
+ fputc ('\n', out);
+ width += 2;
+
+ /* Report lookahead tokens and errors. */
+ for (i = 0; i < errp->num; ++i)
+ if (errp->symbols[i])
+ {
+ const char *tag = errp->symbols[i]->tag;
+ int j;
+ fprintf (out, " %s", tag);
+ for (j = width - strlen (tag); j > 0; --j)
+ fputc (' ', out);
+ fputs (_("error (nonassociative)\n"), out);
+ }
+}
+
+
+/*-------------------------------------------------------------------------.
+| Report a reduction of RULE on LOOKAHEAD_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_token,
+ rule *r, bool enabled)
+{
+ int j;
+ fprintf (out, " %s", lookahead_token);
+ for (j = width - strlen (lookahead_token); j > 0; --j)
+ fputc (' ', out);
+ if (!enabled)
+ fputc ('[', out);
+ if (r->number)
+ fprintf (out, _("reduce using rule %d (%s)"), r->number, r->lhs->tag);
else
- {
- i = 0;
- k = 0;
- }
+ fprintf (out, _("accept"));
+ if (!enabled)
+ fputc (']', out);
+ fputc ('\n', out);
+}
- if (errp)
- {
- int j, nerrs;
- nerrs = errp->nerrs;
+/*-------------------------------------------.
+| Report on OUT the reduction actions of S. |
+`-------------------------------------------*/
- for (j = 0; j < nerrs; j++)
- {
- if (!errp->errs[j])
- continue;
- symbol = errp->errs[j];
- fprintf (out, _(" %-4s\terror (nonassociative)\n"),
- tags[symbol]);
- }
+static void
+print_reductions (FILE *out, state *s)
+{
+ transitions *trans = s->transitions;
+ reductions *reds = s->reductions;
+ rule *default_reduction = NULL;
+ size_t width = 0;
+ int i, j;
+ bool default_reduction_only = true;
- if (j > 0)
- fputc ('\n', out);
- }
+ if (reds->num == 0)
+ return;
- if (state_table[state].consistent && redp)
- {
- rule = redp->rules[0];
- symbol = rule_table[rule].lhs;
- fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"),
- rule, tags[symbol]);
- }
- else if (redp)
+ if (yydefact[s->number] != 0)
+ default_reduction = &rules[yydefact[s->number] - 1];
+
+ bitset_zero (no_reduce_set);
+ FOR_EACH_SHIFT (trans, i)
+ bitset_set (no_reduce_set, TRANSITION_SYMBOL (trans, i));
+ for (i = 0; i < s->errs->num; ++i)
+ if (s->errs->symbols[i])
+ bitset_set (no_reduce_set, s->errs->symbols[i]->number);
+
+ /* Compute the width of the lookahead token column. */
+ if (default_reduction)
+ width = strlen (_("$default"));
+
+ if (reds->lookahead_tokens)
+ for (i = 0; i < ntokens; i++)
+ {
+ bool count = bitset_test (no_reduce_set, i);
+
+ for (j = 0; j < reds->num; ++j)
+ if (bitset_test (reds->lookahead_tokens[j], i))
+ {
+ if (! count)
+ {
+ if (reds->rules[j] != default_reduction)
+ max_length (&width, symbols[i]->tag);
+ count = true;
+ }
+ else
+ {
+ max_length (&width, symbols[i]->tag);
+ }
+ }
+ }
+
+ /* Nothing to report. */
+ if (!width)
+ return;
+
+ fputc ('\n', out);
+ width += 2;
+
+ /* Report lookahead tokens (or $default) and reductions. */
+ if (reds->lookahead_tokens)
+ for (i = 0; i < ntokens; i++)
+ {
+ bool defaulted = false;
+ bool count = bitset_test (no_reduce_set, i);
+ if (count)
+ default_reduction_only = false;
+
+ for (j = 0; j < reds->num; ++j)
+ if (bitset_test (reds->lookahead_tokens[j], i))
+ {
+ if (! count)
+ {
+ if (reds->rules[j] != default_reduction)
+ {
+ default_reduction_only = false;
+ print_reduction (out, width,
+ symbols[i]->tag,
+ reds->rules[j], true);
+ }
+ else
+ defaulted = true;
+ count = true;
+ }
+ else
+ {
+ default_reduction_only = false;
+ if (defaulted)
+ print_reduction (out, width,
+ symbols[i]->tag,
+ default_reduction, true);
+ defaulted = false;
+ print_reduction (out, width,
+ symbols[i]->tag,
+ reds->rules[j], false);
+ }
+ }
+ }
+
+ if (default_reduction)
{
- print_reductions (out, state);
+ char *default_reductions =
+ muscle_percent_define_get ("lr.default-reductions");
+ print_reduction (out, width, _("$default"), default_reduction, true);
+ aver (STREQ (default_reductions, "most")
+ || (STREQ (default_reductions, "consistent")
+ && default_reduction_only)
+ || (reds->num == 1 && reds->rules[0]->number == 0));
+ free (default_reductions);
}
+}
- if (i < k)
- {
- for (; i < k; i++)
- {
- if (!shiftp->shifts[i])
- continue;
- state1 = shiftp->shifts[i];
- symbol = state_table[state1].accessing_symbol;
- fprintf (out, _(" %-4s\tgo to state %d\n"),
- tags[symbol], state1);
- }
- fputc ('\n', out);
- }
+/*--------------------------------------------------------------.
+| Report on OUT all the actions (shifts, gotos, reductions, and |
+| explicit erros from %nonassoc) of S. |
+`--------------------------------------------------------------*/
+
+static void
+print_actions (FILE *out, state *s)
+{
+ /* Print shifts. */
+ print_transitions (s, out, true);
+ print_errs (out, s);
+ print_reductions (out, s);
+ /* Print gotos. */
+ print_transitions (s, out, false);
}
+
+/*----------------------------------.
+| Report all the data on S on OUT. |
+`----------------------------------*/
+
static void
-print_state (FILE *out, int state)
+print_state (FILE *out, state *s)
{
fputs ("\n\n", out);
- fprintf (out, _("state %d"), state);
- fputs ("\n\n", out);
- print_core (out, state);
- print_actions (out, state);
+ fprintf (out, _("state %d"), s->number);
+ fputc ('\n', 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);
+ }
}
/*-----------------------------------------.
| Print information on the whole grammar. |
`-----------------------------------------*/
-#define END_TEST(End) \
-do { \
- if (column + strlen(buffer) > (End)) \
- { \
- fprintf (out, "%s\n ", buffer); \
- column = 3; \
- buffer[0] = 0; \
- } \
-} while (0)
+#define END_TEST(End) \
+ do { \
+ if (column + strlen (buffer) > (End)) \
+ { \
+ fprintf (out, "%s\n ", buffer); \
+ column = 3; \
+ buffer[0] = 0; \
+ } \
+ } while (0)
static void
print_grammar (FILE *out)
{
- int i, j;
- short *rule;
+ symbol_number i;
char buffer[90];
int column = 0;
- /* rule # : LHS -> RHS */
- fprintf (out, "\n%s\n\n", _("Grammar"));
- for (i = 1; i <= nrules; i++)
- /* Don't print rules disabled in reduce_grammar_tables. */
- if (rule_table[i].lhs >= 0)
- {
- fprintf (out, _("rule %-4d %s ->"), i, tags[rule_table[i].lhs]);
- rule = &ritem[rule_table[i].rhs];
- if (*rule > 0)
- while (*rule > 0)
- fprintf (out, " %s", tags[*rule++]);
- else
- fprintf (out, " /* %s */", _("empty"));
- fputc ('\n', out);
- }
+ grammar_rules_print (out);
/* TERMINAL (type #) : rule #s terminal is on RHS */
- fprintf (out, "\n%s\n\n", _("Terminals, with rules where they appear"));
- fprintf (out, "%s (-1)\n", tags[0]);
-
- for (i = 0; i <= max_user_token_number; i++)
- if (token_translations[i] != 2)
+ fprintf (out, "%s\n\n", _("Terminals, with rules where they appear"));
+ for (i = 0; i < max_user_token_number + 1; i++)
+ if (token_translations[i] != undeftoken->number)
{
- buffer[0] = 0;
- column = strlen (tags[token_translations[i]]);
- fputs (tags[token_translations[i]], out);
- END_TEST (50);
- sprintf (buffer, " (%d)", i);
-
- for (j = 1; j <= nrules; j++)
- for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
- if (*rule == token_translations[i])
- {
- END_TEST (65);
- sprintf (buffer + strlen (buffer), " %d", j);
- break;
- }
- fprintf (out, "%s\n", buffer);
+ const char *tag = symbols[token_translations[i]]->tag;
+ rule_number r;
+ item_number *rhsp;
+
+ buffer[0] = 0;
+ column = strlen (tag);
+ fputs (tag, out);
+ END_TEST (65);
+ sprintf (buffer, " (%d)", i);
+
+ for (r = 0; r < nrules; r++)
+ for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+ if (item_number_as_symbol_number (*rhsp) == token_translations[i])
+ {
+ END_TEST (65);
+ sprintf (buffer + strlen (buffer), " %d", r);
+ break;
+ }
+ fprintf (out, "%s\n", buffer);
}
+ fputs ("\n\n", out);
- fprintf (out, "\n%s\n\n",
- _("Nonterminals, with rules where they appear"));
- for (i = ntokens; i <= nsyms - 1; i++)
+
+ fprintf (out, "%s\n\n", _("Nonterminals, with rules where they appear"));
+ for (i = ntokens; i < nsyms; i++)
{
int left_count = 0, right_count = 0;
-
- for (j = 1; j <= nrules; j++)
- {
- if (rule_table[j].lhs == i)
- left_count++;
- for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
- if (*rule == i)
- {
- right_count++;
- break;
- }
- }
+ rule_number r;
+ const char *tag = symbols[i]->tag;
+
+ for (r = 0; r < nrules; r++)
+ {
+ item_number *rhsp;
+ if (rules[r].lhs->number == i)
+ left_count++;
+ for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+ if (item_number_as_symbol_number (*rhsp) == i)
+ {
+ right_count++;
+ break;
+ }
+ }
buffer[0] = 0;
- fputs (tags[i], out);
- column = strlen (tags[i]);
+ fputs (tag, out);
+ column = strlen (tag);
sprintf (buffer, " (%d)", i);
END_TEST (0);
if (left_count > 0)
- {
- END_TEST (50);
- sprintf (buffer + strlen (buffer), _(" on left:"));
-
- for (j = 1; j <= nrules; j++)
- {
- END_TEST (65);
- if (rule_table[j].lhs == i)
- sprintf (buffer + strlen (buffer), " %d", j);
- }
- }
+ {
+ END_TEST (65);
+ sprintf (buffer + strlen (buffer), _(" on left:"));
+
+ for (r = 0; r < nrules; r++)
+ {
+ if (rules[r].lhs->number == i)
+ {
+ END_TEST (65);
+ sprintf (buffer + strlen (buffer), " %d", r);
+ }
+ }
+ }
if (right_count > 0)
- {
- if (left_count > 0)
- sprintf (buffer + strlen (buffer), ",");
- END_TEST (50);
- sprintf (buffer + strlen (buffer), _(" on right:"));
- for (j = 1; j <= nrules; j++)
- {
- for (rule = &ritem[rule_table[j].rhs]; *rule > 0; rule++)
- if (*rule == i)
- {
- END_TEST (65);
- sprintf (buffer + strlen (buffer), " %d", j);
- break;
- }
- }
- }
+ {
+ if (left_count > 0)
+ sprintf (buffer + strlen (buffer), ",");
+ END_TEST (65);
+ sprintf (buffer + strlen (buffer), _(" on right:"));
+ for (r = 0; r < nrules; r++)
+ {
+ item_number *rhsp;
+ for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
+ if (item_number_as_symbol_number (*rhsp) == i)
+ {
+ END_TEST (65);
+ sprintf (buffer + strlen (buffer), " %d", r);
+ break;
+ }
+ }
+ }
fprintf (out, "%s\n", buffer);
}
}
@@ -319,26 +499,31 @@ print_grammar (FILE *out)
void
print_results (void)
{
- if (verbose_flag)
- {
- int 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");
-
- size_t size = obstack_object_size (&output_obstack);
- fwrite (obstack_finish (&output_obstack), 1, size, out);
-
- reduce_output (out);
- conflicts_output (out);
-
- print_grammar (out);
-
- for (i = 0; i < nstates; i++)
- print_state (out, i);
-
- xfclose (out);
- }
- obstack_free (&output_obstack, NULL);
+ 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 useless in parser due to conflicts"),
+ rule_useless_in_parser_p);
+ conflicts_output (out);
+
+ print_grammar (out);
+
+ /* If the whole state item sets, not only the kernels, are wanted,
+ `closure' will be run, which needs memory allocation/deallocation. */
+ if (report_flag & report_itemsets)
+ new_closure (nritems);
+ /* Storage for print_reductions. */
+ no_reduce_set = bitset_create (ntokens, BITSET_FIXED);
+ for (i = 0; i < nstates; i++)
+ print_state (out, states[i]);
+ bitset_free (no_reduce_set);
+ if (report_flag & report_itemsets)
+ free_closure ();
+
+ xfclose (out);
}