cex: also include in the report on --report=counterexamples

And let --report=all include the counterexamples.

* src/getargs.h, src/getargs.c (report_cex): New.
* src/main.c: Compute counterexamples when -rcex is specified.
* src/print.c: Include the counterexamples when -rcex is specified.

* tests/conflicts.at, tests/existing.at, tests/local.at: Adjust.

src/getargs.c

@@ -206,23 +206,26 @@ ARGMATCH_DEFINE_GROUP (report, enum report)
 
 static const argmatch_report_doc argmatch_report_docs[] =
 {
-  { "states",     N_("describe the states") },
-  { "itemsets",   N_("complete the core item sets with their closure") },
-  { "lookaheads", N_("explicitly associate lookahead tokens to items") },
-  { "solved",     N_("describe shift/reduce conflicts solving") },
-  { "all",        N_("include all the above information") },
-  { "none",       N_("disable the report") },
+  { "states",          N_("describe the states") },
+  { "itemsets",        N_("complete the core item sets with their closure") },
+  { "lookaheads",      N_("explicitly associate lookahead tokens to items") },
+  { "solved",          N_("describe shift/reduce conflicts solving") },
+  { "counterexamples", N_("generate conflict counterexamples") },
+  { "all",             N_("include all the above information") },
+  { "none",            N_("disable the report") },
   { NULL, NULL },
 };
 
 static const argmatch_report_arg argmatch_report_args[] =
 {
-  { "none",        report_none },
-  { "states",      report_states },
-  { "itemsets",    report_states | report_itemsets },
-  { "lookaheads",  report_states | report_lookahead_tokens },
-  { "solved",      report_states | report_solved_conflicts },
-  { "all",         report_all },
+  { "none",            report_none },
+  { "states",          report_states },
+  { "itemsets",        report_states | report_itemsets },
+  { "lookaheads",      report_states | report_lookahead_tokens },
+  { "solved",          report_states | report_solved_conflicts },
+  { "counterexamples", report_cex },
+  { "cex",             report_cex },
+  { "all",             report_all },
   { NULL, report_none },
 };
 

src/getargs.h

@@ -79,6 +79,7 @@ enum report
     report_itemsets         = 1 << 1,
     report_lookahead_tokens = 1 << 2,
     report_solved_conflicts = 1 << 3,
+    report_cex              = 1 << 4,
     report_all              = ~0
   };
 /** What appears in the *.output file.  */

src/main.c

@@ -146,7 +146,8 @@ main (int argc, char *argv[])
       conflicts_update_state_numbers (old_to_new, nstates_old);
       free (old_to_new);
     }
-  if (warning_is_enabled (Wcounterexamples))
+  if (report_flag & report_cex
+      || warning_is_enabled (Wcounterexamples))
     counterexample_init ();
   conflicts_print ();
   timevar_pop (tv_conflicts);

src/print.c

@@ -356,7 +356,9 @@ print_state (FILE *out, const state *s)
       fputc ('\n', out);
       fputs (s->solved_conflicts, out);
     }
-  if (warning_is_enabled (Wcounterexamples) && has_conflicts (s))
+  if (has_conflicts (s)
+      && (report_flag & report_cex
+          || warning_is_enabled (Wcounterexamples)))
     {
       fputc ('\n', out);
       counterexample_report_state (s, out, "    ");