/* Print information on generated parser, for bison,
- Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002, 2003, 2004, 2005, 2007
- 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.
#include "system.h"
#include <bitset.h>
-#include <quotearg.h>
#include "LR0.h"
#include "closure.h"
#include "getargs.h"
#include "gram.h"
#include "lalr.h"
+#include "muscle-tab.h"
#include "print.h"
#include "reader.h"
#include "reduce.h"
sp1 = sp = ritem + sitems[i];
while (*sp >= 0)
- sp++;
+ sp++;
r = item_number_as_rule_number (*sp);
previous_lhs = rules[r].lhs;
for (sp = rules[r].rhs; sp < sp1; sp++)
- fprintf (out, " %s", symbols[*sp]->tag);
+ fprintf (out, " %s", symbols[*sp]->tag);
fputs (" .", out);
for (/* Nothing */; *sp >= 0; ++sp)
- fprintf (out, " %s", symbols[*sp]->tag);
+ fprintf (out, " %s", symbols[*sp]->tag);
/* Display the lookahead tokens? */
- if (report_flag & report_lookahead_tokens)
- state_rule_lookahead_tokens_print (s, &rules[r], out);
+ if (report_flag & report_lookahead_tokens
+ && item_number_is_rule_number (*sp1))
+ state_rule_lookahead_tokens_print (s, &rules[r], out);
fputc ('\n', out);
}
/* 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)
+ && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
{
- symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
- max_length (&width, sym->tag);
+ symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+ max_length (&width, sym->tag);
}
/* Nothing to report. */
/* 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)
+ && 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);
+ 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);
}
}
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);
+ 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);
}
}
static void
print_reduction (FILE *out, size_t width,
- const char *lookahead_token,
- rule *r, bool enabled)
+ const char *lookahead_token,
+ rule *r, bool enabled)
{
int j;
fprintf (out, " %s", lookahead_token);
{
transitions *trans = s->transitions;
reductions *reds = s->reductions;
- rule *default_rule = NULL;
+ rule *default_reduction = NULL;
size_t width = 0;
int i, j;
+ bool default_reduction_only = true;
if (reds->num == 0)
return;
if (yydefact[s->number] != 0)
- default_rule = &rules[yydefact[s->number] - 1];
+ default_reduction = &rules[yydefact[s->number] - 1];
bitset_zero (no_reduce_set);
FOR_EACH_SHIFT (trans, i)
bitset_set (no_reduce_set, s->errs->symbols[i]->number);
/* Compute the width of the lookahead token column. */
- if (default_rule)
+ 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_rule)
- max_length (&width, symbols[i]->tag);
- count = true;
- }
- else
- {
- max_length (&width, symbols[i]->tag);
- }
- }
+ 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 (reds->lookahead_tokens)
for (i = 0; i < ntokens; i++)
{
- bool defaulted = false;
- 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_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,
- reds->rules[j], false);
- }
- }
+ 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_rule)
- print_reduction (out, width,
- _("$default"), default_rule, true);
+ if (default_reduction)
+ {
+ char *default_reductions =
+ muscle_percent_define_get ("lr.default-reduction");
+ 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);
+ }
}
| 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
for (i = 0; i < max_user_token_number + 1; i++)
if (token_translations[i] != undeftoken->number)
{
- 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);
+ 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);
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;
- }
- }
+ {
+ 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 (tag, out);
END_TEST (0);
if (left_count > 0)
- {
- 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);
- }
- }
- }
+ {
+ 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 (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;
- }
- }
- }
+ {
+ 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);
}
}
reduce_output (out);
grammar_rules_partial_print (out,
- _("Rules never reduced"), rule_never_reduced_p);
+ _("Rules useless in parser due to conflicts"),
+ rule_useless_in_parser_p);
conflicts_output (out);
print_grammar (out);
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