From: Akim Demaille <akim@epita.fr>
Date: Fri, 27 Sep 2002 14:50:35 +0000 (+0000)
Subject: Remove.
X-Git-Tag: BISON-1_49c~1
X-Git-Url: https://git.saurik.com/bison.git/commitdiff_plain/a75649b395aec70f1d57d3d471ea8dfdf74c4bed

Remove.
---

diff --git a/src/injections.c b/src/injections.c
deleted file mode 100644
index 9deaabdc..00000000
--- a/src/injections.c
+++ /dev/null
@@ -1,126 +0,0 @@
-/* Grammar reduction for Bison.
-   Copyright (C) 2002  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.
-
-   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.
-
-   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.  */
-
-/* Reduce the grammar: Look for injections.  Akim Demaille.  */
-
-#include "system.h"
-#include "quotearg.h"
-#include "bitsetv.h"
-#include "bitsetv-print.h"
-#include "complain.h"
-#include "gram.h"
-#include "getargs.h"
-#include "derives.h"
-#include "injections.h"
-
-/* Set of all nonterminals which are not useless.  */
-static bitsetv injects;
-
-#define   INJECTS(Var)   injects[(Var) - ntokens]
-
-/*-----------------------------------------------------------.
-| Free the global sets used to compute the reduced grammar.  |
-`-----------------------------------------------------------*/
-
-void
-injections_new (void)
-{
-  if (!injects)
-    injects = bitsetv_create (nvars, nvars, BITSET_FIXED);
-  else
-    bitsetv_zero (injects);
-}
-
-void
-injections_free (void)
-{
-  bitsetv_free (injects);
-  injects = NULL;
-}
-
-
-/*------------------------------.
-| Dump the list of injections.  |
-`------------------------------*/
-
-static void
-injections_print (const char *title)
-{
-  int i, j;
-
-  fprintf (stderr, "%s\n", title);
-  for (i = ntokens; i < nsyms; i++)
-    if (bitset_count (INJECTS (i)))
-    {
-      fprintf (stderr, "\t%s injects\n",
-	       quotearg_style (escape_quoting_style, symbols[i]->tag));
-      for (j = 0; j < nvars; j++)
-	if (bitset_test (INJECTS (i), j))
-	  fprintf (stderr, "\t\t%s\n",
-		   quotearg_style (escape_quoting_style,
-				   symbols[j + ntokens]->tag));
-    }
-  fprintf (stderr, "\n\n");
-}
-
-
-/*-----------------------------------------------------------------.
-| Set INJECTS[i, j] if the nonterminal j derives the nonterminal j |
-| (typically, `i -> j' is a rule, plus transitive closure).        |
-`-----------------------------------------------------------------*/
-
-static void
-injections_compute (void)
-{
-  int i, j;
-
-  injections_new ();
-  for (i = ntokens; i < nsyms; i++)
-    for (j = 0; derives[i][j] >= 0; ++j)
-      {
-	int symbol = rules[derives[i][j]].rhs[0];
-	if (ISVAR (symbol) && rules[derives[i][j]].rhs[1] < 0)
-	  bitset_set (INJECTS (i), symbol - ntokens);
-      }
-
-  if (trace_flag & trace_sets)
-    injections_print ("syntactic direct injections");
-  bitsetv_transitive_closure (injects);
-  if (trace_flag & trace_sets)
-    injections_print ("syntactic injections");
-}
-
-
-
-/*--------------------------------------------------------------.
-| Look for infinitely ambiguous grammars: they contain cycles.  |
-`--------------------------------------------------------------*/
-
-void
-injections_check_cycles (void)
-{
-  int i;
-
-  injections_compute ();
-  for (i = ntokens; i < nsyms; i++)
-    if (bitset_test (INJECTS (i), i - ntokens))
-      complain (_("infinitely ambiguous grammar: %s derives itself"),
-		symbols[i]->tag);
-}