decl.c (gfc_match_implicit_range): Don't use typespec.

	* decl.c (gfc_match_implicit_range): Don't use typespec.
	(gfc_match_implicit): Handle character selectors.
	* gfortran.h (gfc_set_implicit): Remove prototype.
	(gfc_add_new_implicit_range, gfc_merge_new_implicit): Update.
	* parse.c (accept_statement): Don't call gfc_set_implicit.
	* symbol.c (new_ts): Remove.
	(gfc_set_implicit_none): Use same loop bounds as other functions.
	(gfc_set_implicit): Remove.
	(gfc_clear_new_implicit, gfc_add_new_implicit_range): Only set flags.
	(gfc_merge_new_implicit): Combine with gfc_set_implicit.
testsuite/
	* gfortran.fortran-torture/compile/implicit_1.f90: New test.

From-SVN: r84063

5 files changed, 86 insertions, 81 deletions

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 89a15bd..a477814 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,16 @@
+2004-07-04  Paul Brook  <paul@codesourcery.com>
+
+	* decl.c (gfc_match_implicit_range): Don't use typespec.
+	(gfc_match_implicit): Handle character selectors.
+	* gfortran.h (gfc_set_implicit): Remove prototype.
+	(gfc_add_new_implicit_range, gfc_merge_new_implicit): Update.
+	* parse.c (accept_statement): Don't call gfc_set_implicit.
+	* symbol.c (new_ts): Remove.
+	(gfc_set_implicit_none): Use same loop bounds as other functions.
+	(gfc_set_implicit): Remove.
+	(gfc_clear_new_implicit, gfc_add_new_implicit_range): Only set flags.
+	(gfc_merge_new_implicit): Combine with gfc_set_implicit.
+
 2004-06-30  Richard Henderson  <rth@redhat.com>
 
 	* match.c (var_element): Remove unused variable.
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index 5c5b728..94573ac 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -1001,7 +1001,7 @@ gfc_match_implicit_none (void)
 /* Match the letter range(s) of an IMPLICIT statement.  */
 
 static match
-match_implicit_range (gfc_typespec * ts)
+match_implicit_range (void)
 {
   int c, c1, c2, inner;
   locus cur_loc;
@@ -1068,7 +1068,7 @@ match_implicit_range (gfc_typespec * ts)
          conflicts with whatever earlier IMPLICIT statements may have
          set.  This is done when we've successfully finished matching
          the current one.  */
-      if (gfc_add_new_implicit_range (c1, c2, ts) != SUCCESS)
+      if (gfc_add_new_implicit_range (c1, c2) != SUCCESS)
 	goto bad;
     }
 
@@ -1116,11 +1116,11 @@ gfc_match_implicit (void)
       return MATCH_ERROR;
     }
 
-  /* First cleanup.  */
-  gfc_clear_new_implicit ();
-
   do
     {
+      /* First cleanup.  */
+      gfc_clear_new_implicit ();
+
       /* A basic type is mandatory here.  */
       m = match_type_spec (&ts, 1);
       if (m == MATCH_ERROR)
@@ -1129,39 +1129,56 @@ gfc_match_implicit (void)
 	goto syntax;
 
       cur_loc = gfc_current_locus;
-      m = match_implicit_range (&ts);
-
-      if (m != MATCH_YES && ts.type == BT_CHARACTER)
-	{
-	  /* looks like we are matching CHARACTER (<len>) (<range>)  */
-	  m = match_char_spec (&ts);
-	}	  
+      m = match_implicit_range ();
 
       if (m == MATCH_YES)
 	{
-	  /* Looks like we have the <TYPE> (<RANGE>).  */
+	  /* We may have <TYPE> (<RANGE>).  */
 	  gfc_gobble_whitespace ();
 	  c = gfc_next_char ();
 	  if ((c == '\n') || (c == ','))
-	    continue;
+	    {
+	      /* Check for CHARACTER with no length parameter.  */
+	      if (ts.type == BT_CHARACTER && !ts.cl)
+		{
+		  ts.kind = gfc_default_character_kind ();
+		  ts.cl = gfc_get_charlen ();
+		  ts.cl->next = gfc_current_ns->cl_list;
+		  gfc_current_ns->cl_list = ts.cl;
+		  ts.cl->length = gfc_int_expr (1);
+		}
+
+	      /* Record the Successful match.  */
+	      if (gfc_merge_new_implicit (&ts) != SUCCESS)
+		return MATCH_ERROR;
+	      continue;
+	    }
 
 	  gfc_current_locus = cur_loc;
 	}
 
-      /* Last chance -- check <TYPE> (<KIND>) (<RANGE>).  */
-      m = gfc_match_kind_spec (&ts);
-      if (m == MATCH_ERROR)
-	goto error;
-      if (m == MATCH_NO)
+      /* Discard the (incorrectly) matched range.  */
+      gfc_clear_new_implicit ();
+
+      /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>).  */
+      if (ts.type == BT_CHARACTER)
+	m = match_char_spec (&ts);
+      else
 	{
-	  m = gfc_match_old_kind_spec (&ts);
-	  if (m == MATCH_ERROR)
-	    goto error;
+	  m = gfc_match_kind_spec (&ts);
 	  if (m == MATCH_NO)
-	    goto syntax;
+	    {
+	      m = gfc_match_old_kind_spec (&ts);
+	      if (m == MATCH_ERROR)
+		goto error;
+	      if (m == MATCH_NO)
+		goto syntax;
+	    }
 	}
+      if (m == MATCH_ERROR)
+	goto error;
 
-      m = match_implicit_range (&ts);
+      m = match_implicit_range ();
       if (m == MATCH_ERROR)
 	goto error;
       if (m == MATCH_NO)
@@ -1172,14 +1189,12 @@ gfc_match_implicit (void)
       if ((c != '\n') && (c != ','))
 	goto syntax;
 
+      if (gfc_merge_new_implicit (&ts) != SUCCESS)
+	return MATCH_ERROR;
     }
   while (c == ',');
 
-  /* All we need to now is try to merge the new implicit types back
-     into the existing types.  This will fail if another implicit
-     type is already defined for a letter.  */
-  return (gfc_merge_new_implicit () == SUCCESS) ?
-      MATCH_YES : MATCH_ERROR;
+  return MATCH_YES;
 
 syntax:
   gfc_syntax_error (ST_IMPLICIT);
diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h
index d35506a..86113ad 100644
--- a/gcc/fortran/gfortran.h
+++ b/gcc/fortran/gfortran.h
@@ -1435,10 +1435,9 @@ extern int gfc_index_integer_kind;
 
 /* symbol.c */
 void gfc_clear_new_implicit (void);
-try gfc_add_new_implicit_range (int, int, gfc_typespec *);
-try gfc_merge_new_implicit (void);
+try gfc_add_new_implicit_range (int, int);
+try gfc_merge_new_implicit (gfc_typespec *);
 void gfc_set_implicit_none (void);
-void gfc_set_implicit (void);
 
 gfc_typespec *gfc_get_default_type (gfc_symbol *, gfc_namespace *);
 try gfc_set_default_type (gfc_symbol *, int, gfc_namespace *);
diff --git a/gcc/fortran/parse.c b/gcc/fortran/parse.c
index 3f9ca81..15a53ea 100644
--- a/gcc/fortran/parse.c
+++ b/gcc/fortran/parse.c
@@ -1019,7 +1019,6 @@ accept_statement (gfc_statement st)
       break;
 
     case ST_IMPLICIT:
-      gfc_set_implicit ();
       break;
 
     case ST_FUNCTION:
diff --git a/gcc/fortran/symbol.c b/gcc/fortran/symbol.c
index 8887741..9208d22 100644
--- a/gcc/fortran/symbol.c
+++ b/gcc/fortran/symbol.c
@@ -96,13 +96,9 @@ static gfc_symbol *changed_syms = NULL;
 
 /*********** IMPLICIT NONE and IMPLICIT statement handlers ***********/
 
-/* The following static variables hold the default types set by
-   IMPLICIT statements.  We have to store kind information because of
-   IMPLICIT DOUBLE PRECISION statements.  IMPLICIT NONE stores a
-   BT_UNKNOWN into all elements.  The arrays of flags indicate whether
-   a particular element has been explicitly set or not.  */
+/* The following static variable indicates whether a particular element has
+   been explicitly set or not.  */
 
-static gfc_typespec new_ts[GFC_LETTERS];
 static int new_flag[GFC_LETTERS];
 
 
@@ -113,48 +109,30 @@ gfc_set_implicit_none (void)
 {
   int i;
 
-  for (i = 'a'; i <= 'z'; i++)
+  for (i = 0; i < GFC_LETTERS; i++)
     {
-      gfc_clear_ts (&gfc_current_ns->default_type[i - 'a']);
-      gfc_current_ns->set_flag[i - 'a'] = 1;
+      gfc_clear_ts (&gfc_current_ns->default_type[i]);
+      gfc_current_ns->set_flag[i] = 1;
     }
 }
 
 
-/* Sets the implicit types parsed by gfc_match_implicit().  */
+/* Reset the implicit range flags.  */
 
 void
-gfc_set_implicit (void)
-{
-  int i;
-
-  for (i = 0; i < GFC_LETTERS; i++)
-    if (new_flag[i])
-      {
-	gfc_current_ns->default_type[i] = new_ts[i];
-	gfc_current_ns->set_flag[i] = 1;
-      }
-}
-
-
-/* Wipe anything a previous IMPLICIT statement may have tried to do.  */
-void gfc_clear_new_implicit (void)
+gfc_clear_new_implicit (void)
 {
   int i;
 
   for (i = 0; i < GFC_LETTERS; i++)
-    {
-      gfc_clear_ts (&new_ts[i]);
-      if (new_flag[i])
-	new_flag[i] = 0;
-    }
+    new_flag[i] = 0;
 }
 
 
-/* Prepare for a new implicit range. Sets flags in new_flag[] and
-   copies the typespec to new_ts[].  */
+/* Prepare for a new implicit range.  Sets flags in new_flag[].  */
 
-try gfc_add_new_implicit_range (int c1, int c2, gfc_typespec * ts)
+try
+gfc_add_new_implicit_range (int c1, int c2)
 {
   int i;
 
@@ -170,7 +148,6 @@ try gfc_add_new_implicit_range (int c1, int c2, gfc_typespec * ts)
 	  return FAILURE;
 	}
 
-      new_ts[i] = *ts;
       new_flag[i] = 1;
     }
 
@@ -178,27 +155,29 @@ try gfc_add_new_implicit_range (int c1, int c2, gfc_typespec * ts)
 }
 
 
-/* Add a matched implicit range for gfc_set_implicit().  An implicit
-   statement has been fully matched at this point.  We now need to
-   check if merging the new implicit types back into the existing
-   types will work.  */
+/* Add a matched implicit range for gfc_set_implicit().  Check if merging
+   the new implicit types back into the existing types will work.  */
 
 try
-gfc_merge_new_implicit (void)
+gfc_merge_new_implicit (gfc_typespec * ts)
 {
   int i;
 
   for (i = 0; i < GFC_LETTERS; i++)
-    if (new_flag[i])
-      {
-	if (gfc_current_ns->set_flag[i])
-	  {
-	    gfc_error ("Letter %c already has an IMPLICIT type at %C",
-		       i + 'A');
-	    return FAILURE;
-	  }
-      }
+    {
+      if (new_flag[i])
+	{
 
+	  if (gfc_current_ns->set_flag[i])
+	    {
+	      gfc_error ("Letter %c already has an IMPLICIT type at %C",
+			 i + 'A');
+	      return FAILURE;
+	    }
+	  gfc_current_ns->default_type[i] = *ts;
+	  gfc_current_ns->set_flag[i] = 1;
+	}
+    }
   return SUCCESS;
 }