X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ccaf65bc6331dfb0684876a7475c6474b99125ea..e42906f7904ca7516e9867a3a19ee08d963b1205:/src/conflicts.c diff --git a/src/conflicts.c b/src/conflicts.c index 6ad9222b..f8ed1772 100644 --- a/src/conflicts.c +++ b/src/conflicts.c @@ -1,48 +1,53 @@ -/* Find and resolve or report look-ahead conflicts for bison, - Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002 - Free Software Foundation, Inc. +/* Find and resolve or report lookahead conflicts for bison, + + Copyright (C) 1984, 1989, 1992, 2000-2012 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 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. + 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 3 of the License, or + (at your option) any later version. - Bison 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. + 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 "bitset.h" + +#include + +#include "LR0.h" #include "complain.h" -#include "getargs.h" -#include "symtab.h" +#include "conflicts.h" #include "files.h" +#include "getargs.h" #include "gram.h" -#include "state.h" #include "lalr.h" -#include "conflicts.h" +#include "print-xml.h" #include "reader.h" -#include "LR0.h" +#include "state.h" +#include "symtab.h" /* -1 stands for not specified. */ -int expected_conflicts = -1; -static char *conflicts = NULL; -struct obstack solved_conflicts_obstack; +int expected_sr_conflicts = -1; +int expected_rr_conflicts = -1; +static char *conflicts; +static struct obstack solved_conflicts_obstack; +static struct obstack solved_conflicts_xml_obstack; -static bitset shiftset; -static bitset lookaheadset; +static bitset shift_set; +static bitset lookahead_set; -enum conflict_resolution_e +enum conflict_resolution { shift_resolution, reduce_resolution, @@ -58,107 +63,184 @@ enum conflict_resolution_e `----------------------------------------------------------------*/ static inline void -log_resolution (rule_t *rule, int token, - enum conflict_resolution_e resolution) +log_resolution (rule *r, symbol_number token, + enum conflict_resolution resolution) { if (report_flag & report_solved_conflicts) { /* The description of the resolution. */ switch (resolution) - { - case shift_resolution: - case left_resolution: - obstack_fgrow2 (&solved_conflicts_obstack, - _("\ - Conflict between rule %d and token %s resolved as shift"), - rule->number, - symbols[token]->tag); - break; - case reduce_resolution: - case right_resolution: - obstack_fgrow2 (&solved_conflicts_obstack, - _("\ - Conflict between rule %d and token %s resolved as reduce"), - rule->number, - symbols[token]->tag); - break; - case nonassoc_resolution: - obstack_fgrow2 (&solved_conflicts_obstack, - _("\ - Conflict between rule %d and token %s resolved as an error"), - rule->number, - symbols[token]->tag); - break; - } + { + case shift_resolution: + case right_resolution: + obstack_printf (&solved_conflicts_obstack, + _(" Conflict between rule %d and token %s" + " resolved as shift"), + r->number, + symbols[token]->tag); + break; + + case reduce_resolution: + case left_resolution: + obstack_printf (&solved_conflicts_obstack, + _(" Conflict between rule %d and token %s" + " resolved as reduce"), + r->number, + symbols[token]->tag); + break; + + case nonassoc_resolution: + obstack_printf (&solved_conflicts_obstack, + _(" Conflict between rule %d and token %s" + " resolved as an error"), + r->number, + symbols[token]->tag); + break; + } /* The reason. */ switch (resolution) - { - case shift_resolution: - obstack_fgrow2 (&solved_conflicts_obstack, - " (%s < %s)", - rule->prec->tag, - symbols[token]->tag); - break; - - case reduce_resolution: - obstack_fgrow2 (&solved_conflicts_obstack, - " (%s < %s)", - symbols[token]->tag, - rule->prec->tag); - break; - - case left_resolution: - obstack_fgrow1 (&solved_conflicts_obstack, - " (%%left %s)", - symbols[token]->tag); - break; - - case right_resolution: - obstack_fgrow1 (&solved_conflicts_obstack, - " (%%right %s)", - symbols[token]->tag); - break; - case nonassoc_resolution: - obstack_fgrow1 (&solved_conflicts_obstack, - " (%%nonassoc %s)", - symbols[token]->tag); - break; - } + { + case shift_resolution: + obstack_printf (&solved_conflicts_obstack, + " (%s < %s)", + r->prec->tag, + symbols[token]->tag); + break; + + case reduce_resolution: + obstack_printf (&solved_conflicts_obstack, + " (%s < %s)", + symbols[token]->tag, + r->prec->tag); + break; + + case left_resolution: + obstack_printf (&solved_conflicts_obstack, + " (%%left %s)", + symbols[token]->tag); + break; + + case right_resolution: + obstack_printf (&solved_conflicts_obstack, + " (%%right %s)", + symbols[token]->tag); + break; + + case nonassoc_resolution: + obstack_printf (&solved_conflicts_obstack, + " (%%nonassoc %s)", + symbols[token]->tag); + break; + } + obstack_sgrow (&solved_conflicts_obstack, ".\n"); } + + /* XML report */ + if (xml_flag) + { + /* The description of the resolution. */ + switch (resolution) + { + case shift_resolution: + case right_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + " ", + r->number, + xml_escape (symbols[token]->tag)); + break; + + case reduce_resolution: + case left_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + " ", + r->number, + xml_escape (symbols[token]->tag)); + break; + + case nonassoc_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + " ", + r->number, + xml_escape (symbols[token]->tag)); + break; + } + + /* The reason. */ + switch (resolution) + { + case shift_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + "%s < %s", + xml_escape_n (0, r->prec->tag), + xml_escape_n (1, symbols[token]->tag)); + break; + + case reduce_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + "%s < %s", + xml_escape_n (0, symbols[token]->tag), + xml_escape_n (1, r->prec->tag)); + break; + + case left_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + "%%left %s", + xml_escape (symbols[token]->tag)); + break; + + case right_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + "%%right %s", + xml_escape (symbols[token]->tag)); + break; + + case nonassoc_resolution: + obstack_printf (&solved_conflicts_xml_obstack, + "%%nonassoc %s", + xml_escape (symbols[token]->tag)); + break; + } + + obstack_sgrow (&solved_conflicts_xml_obstack, "\n"); + } } /*------------------------------------------------------------------. | Turn off the shift recorded for the specified token in the | | specified state. Used when we resolve a shift-reduce conflict in | -| favor of the reduction. | +| favor of the reduction or as an error (%nonassoc). | `------------------------------------------------------------------*/ static void -flush_shift (state_t *state, int token) +flush_shift (state *s, int token) { - transitions_t *transitions = state->shifts; + transitions *trans = s->transitions; int i; - bitset_reset (lookaheadset, token); - for (i = 0; i < transitions->num; i++) - if (!TRANSITION_IS_DISABLED (transitions, i) && TRANSITION_SYMBOL (transitions, i) == token) - TRANSITION_DISABLE (transitions, i); + bitset_reset (lookahead_set, token); + for (i = 0; i < trans->num; i++) + if (!TRANSITION_IS_DISABLED (trans, i) + && TRANSITION_SYMBOL (trans, i) == token) + TRANSITION_DISABLE (trans, i); } -/*-------------------------------------------------------------------. -| Turn off the reduce recorded for the specified token for the | -| specified lookahead. Used when we resolve a shift-reduce conflict | -| in favor of the shift. | -`-------------------------------------------------------------------*/ +/*--------------------------------------------------------------------. +| Turn off the reduce recorded for the specified token in the | +| specified lookahead set. Used when we resolve a shift-reduce | +| conflict in favor of the shift or as an error (%nonassoc). | +`--------------------------------------------------------------------*/ static void -flush_reduce (bitset lookaheads, int token) +flush_reduce (bitset lookahead_tokens, int token) { - bitset_reset (lookaheads, token); + bitset_reset (lookahead_tokens, token); } @@ -168,134 +250,171 @@ flush_reduce (bitset lookaheads, int token) | rule has a precedence. A conflict is resolved by modifying the | | shift or reduce tables so that there is no longer a conflict. | | | -| LOOKAHEAD is the number of the lookahead bitset to consider. | +| RULENO is the number of the lookahead bitset to consider. | +| | +| ERRORS and NERRS can be used to store discovered explicit | +| errors. | `------------------------------------------------------------------*/ static void -resolve_sr_conflict (state_t *state, int lookahead) +resolve_sr_conflict (state *s, int ruleno, symbol **errors, int *nerrs) { - int i; + symbol_number i; + reductions *reds = s->reductions; /* Find the rule to reduce by to get precedence of reduction. */ - rule_t *redrule = state->lookaheads_rule[lookahead]; + rule *redrule = reds->rules[ruleno]; int redprec = redrule->prec->prec; - bitset lookaheads = state->lookaheads[lookahead]; - errs_t *errp = errs_new (ntokens + 1); - errp->nerrs = 0; + bitset lookahead_tokens = reds->lookahead_tokens[ruleno]; for (i = 0; i < ntokens; i++) - if (bitset_test (lookaheads, i) - && bitset_test (lookaheadset, i) - && symbols[i]->prec) + if (bitset_test (lookahead_tokens, i) + && bitset_test (lookahead_set, i) + && symbols[i]->prec) { - /* Shift-reduce conflict occurs for token number i - and it has a precedence. - The precedence of shifting is that of token i. */ - if (symbols[i]->prec < redprec) - { - log_resolution (redrule, i, reduce_resolution); - flush_shift (state, i); - } - else if (symbols[i]->prec > redprec) - { - log_resolution (redrule, i, shift_resolution); - flush_reduce (lookaheads, i); - } - else - /* Matching precedence levels. - For left association, keep only the reduction. - For right association, keep only the shift. - For nonassociation, keep neither. */ - - switch (symbols[i]->assoc) - { - case right_assoc: - log_resolution (redrule, i, right_resolution); - flush_reduce (lookaheads, i); - break; - - case left_assoc: - log_resolution (redrule, i, left_resolution); - flush_shift (state, i); - break; - - case non_assoc: - log_resolution (redrule, i, nonassoc_resolution); - flush_shift (state, i); - flush_reduce (lookaheads, i); - /* Record an explicit error for this token. */ - errp->errs[errp->nerrs++] = i; - break; - - case undef_assoc: - assert (symbols[i]->assoc != undef_assoc); - break; - } + /* Shift-reduce conflict occurs for token number i + and it has a precedence. + The precedence of shifting is that of token i. */ + if (symbols[i]->prec < redprec) + { + log_resolution (redrule, i, reduce_resolution); + flush_shift (s, i); + } + else if (symbols[i]->prec > redprec) + { + log_resolution (redrule, i, shift_resolution); + flush_reduce (lookahead_tokens, i); + } + else + /* Matching precedence levels. + For non-defined associativity, keep both: unexpected + associativity conflict. + For left associativity, keep only the reduction. + For right associativity, keep only the shift. + For nonassociativity, keep neither. */ + + switch (symbols[i]->assoc) + { + case undef_assoc: + abort (); + + case precedence_assoc: + break; + + case right_assoc: + log_resolution (redrule, i, right_resolution); + flush_reduce (lookahead_tokens, i); + break; + + case left_assoc: + log_resolution (redrule, i, left_resolution); + flush_shift (s, i); + break; + + case non_assoc: + log_resolution (redrule, i, nonassoc_resolution); + flush_shift (s, i); + flush_reduce (lookahead_tokens, i); + /* Record an explicit error for this token. */ + errors[(*nerrs)++] = symbols[i]; + break; + } } - - /* Some tokens have been explicitly made errors. Allocate a - permanent errs structure for this state, to record them. */ - state->errs = errs_dup (errp); - free (errp); - - if (obstack_object_size (&solved_conflicts_obstack)) - { - obstack_1grow (&solved_conflicts_obstack, '\0'); - state->solved_conflicts = obstack_finish (&solved_conflicts_obstack); - } } +/*-------------------------------------------------------------------. +| Solve the S/R conflicts of state S using the | +| precedence/associativity, and flag it inconsistent if it still has | +| conflicts. ERRORS can be used as storage to compute the list of | +| lookahead tokens on which S raises a syntax error (%nonassoc). | +`-------------------------------------------------------------------*/ + static void -set_conflicts (state_t *state) +set_conflicts (state *s, symbol **errors) { int i; - transitions_t *transitions; + transitions *trans = s->transitions; + reductions *reds = s->reductions; + int nerrs = 0; - if (state->consistent) + if (s->consistent) return; - bitset_zero (lookaheadset); + bitset_zero (lookahead_set); - transitions = state->shifts; - for (i = 0; i < transitions->num && TRANSITION_IS_SHIFT (transitions, i); i++) - if (!TRANSITION_IS_DISABLED (transitions, i)) - bitset_set (lookaheadset, TRANSITION_SYMBOL (transitions, i)); + FOR_EACH_SHIFT (trans, i) + bitset_set (lookahead_set, TRANSITION_SYMBOL (trans, i)); /* Loop over all rules which require lookahead in this state. First check for shift-reduce conflict, and try to resolve using precedence. */ - for (i = 0; i < state->nlookaheads; ++i) - if (state->lookaheads_rule[i]->prec - && state->lookaheads_rule[i]->prec->prec - && !bitset_disjoint_p (state->lookaheads[i], lookaheadset)) - { - resolve_sr_conflict (state, i); - break; - } + for (i = 0; i < reds->num; ++i) + if (reds->rules[i]->prec && reds->rules[i]->prec->prec + && !bitset_disjoint_p (reds->lookahead_tokens[i], lookahead_set)) + resolve_sr_conflict (s, i, errors, &nerrs); + + if (nerrs) + { + /* Some tokens have been explicitly made errors. Allocate a + permanent errs structure for this state, to record them. */ + state_errs_set (s, nerrs, errors); + } + if (obstack_object_size (&solved_conflicts_obstack)) + s->solved_conflicts = obstack_finish0 (&solved_conflicts_obstack); + if (obstack_object_size (&solved_conflicts_xml_obstack)) + s->solved_conflicts_xml = obstack_finish0 (&solved_conflicts_xml_obstack); /* Loop over all rules which require lookahead in this state. Check for conflicts not resolved above. */ - for (i = 0; i < state->nlookaheads; ++i) + for (i = 0; i < reds->num; ++i) { - if (!bitset_disjoint_p (state->lookaheads[i], lookaheadset)) - conflicts[state->number] = 1; - - bitset_or (lookaheadset, lookaheadset, state->lookaheads[i]); + if (!bitset_disjoint_p (reds->lookahead_tokens[i], lookahead_set)) + conflicts[s->number] = 1; + bitset_or (lookahead_set, lookahead_set, reds->lookahead_tokens[i]); } } + +/*----------------------------------------------------------------. +| Solve all the S/R conflicts using the precedence/associativity, | +| and flag as inconsistent the states that still have conflicts. | +`----------------------------------------------------------------*/ + void conflicts_solve (void) { - state_number_t i; + state_number i; + /* List of lookahead tokens on which we explicitly raise a syntax error. */ + symbol **errors = xnmalloc (ntokens + 1, sizeof *errors); - conflicts = XCALLOC (char, nstates); - shiftset = bitset_create (ntokens, BITSET_FIXED); - lookaheadset = bitset_create (ntokens, BITSET_FIXED); + conflicts = xcalloc (nstates, sizeof *conflicts); + shift_set = bitset_create (ntokens, BITSET_FIXED); + lookahead_set = bitset_create (ntokens, BITSET_FIXED); obstack_init (&solved_conflicts_obstack); + obstack_init (&solved_conflicts_xml_obstack); for (i = 0; i < nstates; i++) - set_conflicts (states[i]); + { + set_conflicts (states[i], errors); + + /* For uniformity of the code, make sure all the states have a valid + `errs' member. */ + if (!states[i]->errs) + states[i]->errs = errs_new (0, 0); + } + + free (errors); +} + + +void +conflicts_update_state_numbers (state_number old_to_new[], + state_number nstates_old) +{ + state_number i; + for (i = 0; i < nstates_old; ++i) + if (old_to_new[i] != nstates_old) + conflicts[old_to_new[i]] = conflicts[i]; } @@ -303,100 +422,86 @@ conflicts_solve (void) | Count the number of shift/reduce conflicts. | `---------------------------------------------*/ -static int -count_sr_conflicts (state_t *state) +static size_t +count_state_sr_conflicts (state *s) { int i; - int src_count = 0; - transitions_t *transitions = state->shifts; + transitions *trans = s->transitions; + reductions *reds = s->reductions; - if (!transitions) + if (!trans) return 0; - bitset_zero (lookaheadset); - bitset_zero (shiftset); + bitset_zero (lookahead_set); + bitset_zero (shift_set); - for (i = 0; i < transitions->num && TRANSITION_IS_SHIFT (transitions, i); i++) - if (!TRANSITION_IS_DISABLED (transitions, i)) - bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i)); + FOR_EACH_SHIFT (trans, i) + bitset_set (shift_set, TRANSITION_SYMBOL (trans, i)); - for (i = 0; i < state->nlookaheads; ++i) - bitset_or (lookaheadset, lookaheadset, state->lookaheads[i]); + for (i = 0; i < reds->num; ++i) + bitset_or (lookahead_set, lookahead_set, reds->lookahead_tokens[i]); - bitset_and (lookaheadset, lookaheadset, shiftset); + bitset_and (lookahead_set, lookahead_set, shift_set); + + return bitset_count (lookahead_set); +} + +/*---------------------------------------------. +| The total number of shift/reduce conflicts. | +`---------------------------------------------*/ - src_count = bitset_count (lookaheadset); +static size_t +count_sr_conflicts (void) +{ + size_t res = 0; + state_number i; - return src_count; + /* Conflicts by state. */ + for (i = 0; i < nstates; i++) + if (conflicts[i]) + res += count_state_sr_conflicts (states[i]); + return res; } + /*----------------------------------------------------------------. | Count the number of reduce/reduce conflicts. If ONE_PER_TOKEN, | | count one conflict for each token that has any reduce/reduce | | conflicts. Otherwise, count one conflict for each pair of | | conflicting reductions. | -+`----------------------------------------------------------------*/ +`----------------------------------------------------------------*/ -static int -count_rr_conflicts (state_t *state, int one_per_token) +static size_t +count_state_rr_conflicts (state *s, bool one_per_token) { int i; - int rrc_count = 0; - - if (state->nlookaheads < 2) - return 0; + reductions *reds = s->reductions; + size_t res = 0; for (i = 0; i < ntokens; i++) { int count = 0; int j; - for (j = 0; j < state->nlookaheads; ++j) - if (bitset_test (state->lookaheads[j], i)) - count++; - + for (j = 0; j < reds->num; ++j) + count += bitset_test (reds->lookahead_tokens[j], i); if (count >= 2) - rrc_count += one_per_token ? 1 : count-1; + res += one_per_token ? 1 : count-1; } - return rrc_count; + return res; } -/*--------------------------------------------------------------. -| Return a human readable string which reports shift/reduce and | -| reduce/reduce conflict numbers (SRC_NUM, RRC_NUM). | -`--------------------------------------------------------------*/ - -static const char * -conflict_report (int src_num, int rrc_num) +static size_t +count_rr_conflicts (bool one_per_token) { - static char res[4096]; - char *cp = res; - - if (src_num >= 1) - { - sprintf (cp, ngettext ("%d shift/reduce conflict", - "%d shift/reduce conflicts", src_num), src_num); - cp += strlen (cp); - } - - if (src_num > 0 && rrc_num > 0) - { - sprintf (cp, " %s ", _("and")); - cp += strlen (cp); - } - - if (rrc_num >= 1) - { - sprintf (cp, ngettext ("%d reduce/reduce conflict", - "%d reduce/reduce conflicts", rrc_num), rrc_num); - cp += strlen (cp); - } - - *cp++ = '.'; - *cp++ = '\n'; - *cp++ = '\0'; + size_t res = 0; + state_number i; + /* Conflicts by state. */ + for (i = 0; i < nstates; i++) + if (conflicts[i]) + res += count_state_rr_conflicts (states[i], one_per_token); return res; } @@ -408,16 +513,27 @@ conflict_report (int src_num, int rrc_num) void conflicts_output (FILE *out) { - bool printed_sth = FALSE; - state_number_t i; + bool printed_sth = false; + state_number i; for (i = 0; i < nstates; i++) - if (conflicts[i]) - { - fprintf (out, _("State %d contains "), i); - fputs (conflict_report (count_sr_conflicts (states[i]), - count_rr_conflicts (states[i], TRUE)), out); - printed_sth = TRUE; - } + { + state *s = states[i]; + if (conflicts[i]) + { + int src = count_state_sr_conflicts (s); + int rrc = count_state_rr_conflicts (s, true); + fprintf (out, _("State %d "), i); + if (src && rrc) + fprintf (out, + _("conflicts: %d shift/reduce, %d reduce/reduce\n"), + src, rrc); + else if (src) + fprintf (out, _("conflicts: %d shift/reduce\n"), src); + else if (rrc) + fprintf (out, _("conflicts: %d reduce/reduce\n"), rrc); + printed_sth = true; + } + } if (printed_sth) fputs ("\n\n", out); } @@ -426,24 +542,13 @@ conflicts_output (FILE *out) | Total the number of S/R and R/R conflicts. Unlike the | | code in conflicts_output, however, count EACH pair of | | reductions for the same state and lookahead as one | -| conflict. | +| conflict. | `--------------------------------------------------------*/ int conflicts_total_count (void) { - state_number_t i; - int count; - - /* Conflicts by state. */ - count = 0; - for (i = 0; i < nstates; i++) - if (conflicts[i]) - { - count += count_sr_conflicts (states[i]); - count += count_rr_conflicts (states[i], FALSE); - } - return count; + return count_sr_conflicts () + count_rr_conflicts (false); } @@ -454,69 +559,66 @@ conflicts_total_count (void) void conflicts_print (void) { - /* Is the number of SR conflicts OK? Either EXPECTED_CONFLICTS is - not set, and then we want 0 SR, or else it is specified, in which - case we want equality. */ - int src_ok = 0; - - int src_total = 0; - int rrc_total = 0; + if (! glr_parser && expected_rr_conflicts != -1) + { + complain (NULL, Wother, _("%%expect-rr applies only to GLR parsers")); + expected_rr_conflicts = -1; + } - /* Conflicts by state. */ + /* Screams for factoring, but almost useless because of the + different strings to translate. */ { - state_number_t i; - - for (i = 0; i < nstates; i++) - if (conflicts[i]) - { - src_total += count_sr_conflicts (states[i]); - rrc_total += count_rr_conflicts (states[i], TRUE); - } + int total = count_sr_conflicts (); + // If %expect is not used, but %expect-rr is, then expect 0 sr. + int expected = + (expected_sr_conflicts == -1 && expected_rr_conflicts != -1) + ? 0 + : expected_sr_conflicts; + if (expected != -1) + { + if (expected != total) + complain (NULL, complaint, + _("shift/reduce conflicts: %d found, %d expected"), + total, expected); + } + else if (total) + complain (NULL, Wconflicts_sr, + ngettext ("%d shift/reduce conflict", + "%d shift/reduce conflicts", + total), + total); } - src_ok = src_total == (expected_conflicts == -1 ? 0 : expected_conflicts); - - /* If there are no RR conflicts, and as many SR conflicts as - expected, then there is nothing to report. */ - if (!rrc_total && src_ok) - return; - - /* Report the total number of conflicts on STDERR. */ - if (yacc_flag) - { - /* If invoked with `--yacc', use the output format specified by - POSIX. */ - fprintf (stderr, _("conflicts: ")); - if (src_total > 0) - fprintf (stderr, _(" %d shift/reduce"), src_total); - if (src_total > 0 && rrc_total > 0) - fprintf (stderr, ","); - if (rrc_total > 0) - fprintf (stderr, _(" %d reduce/reduce"), rrc_total); - putc ('\n', stderr); - } - else - { - fprintf (stderr, _("%s contains "), infile); - fputs (conflict_report (src_total, rrc_total), stderr); - } - - if (expected_conflicts != -1 && !src_ok) - { - complain_message_count++; - fprintf (stderr, ngettext ("expected %d shift/reduce conflict\n", - "expected %d shift/reduce conflicts\n", - expected_conflicts), - expected_conflicts); - } + { + int total = count_rr_conflicts (true); + // If %expect-rr is not used, but %expect is, then expect 0 rr. + int expected = + (expected_rr_conflicts == -1 && expected_sr_conflicts != -1) + ? 0 + : expected_rr_conflicts; + if (expected != -1) + { + if (expected != total) + complain (NULL, complaint, + _("reduce/reduce conflicts: %d found, %d expected"), + total, expected); + } + else if (total) + complain (NULL, Wconflicts_rr, + ngettext ("%d reduce/reduce conflict", + "%d reduce/reduce conflicts", + total), + total); + } } void conflicts_free (void) { - XFREE (conflicts); - bitset_free (shiftset); - bitset_free (lookaheadset); + free (conflicts); + bitset_free (shift_set); + bitset_free (lookahead_set); obstack_free (&solved_conflicts_obstack, NULL); + obstack_free (&solved_conflicts_xml_obstack, NULL); }