re PR fortran/77391 (gfortran allows CHARACTER(LEN=:),PARAMETER::…

re PR fortran/77391 (gfortran allows CHARACTER(LEN=:),PARAMETER:: STRING='constant'   buts does not report it as an extension)

2016-09-04  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/77391
	* resolve.c (deferred_requirements): New function to check F2008:C402.
	(resolve_fl_variable,resolve_fl_parameter): Use it.
 
2016-09-04  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/77391
	* gfortran.dg/pr77391.f90: New test.

From-SVN: r239982

gcc/fortran/ChangeLog

 2016-09-04  Steven G. Kargl  <kargl@gcc.gnu.org>
 
+	PR fortran/77391
+	* resolve.c (deferred_requirements): New function to check F2008:C402.
+	(resolve_fl_variable,resolve_fl_parameter): Use it.
+ 
+2016-09-04  Steven G. Kargl  <kargl@gcc.gnu.org>
+
 	PR fortran/77460
 	* simplify.c (simplify_transformation_to_scalar):  On error, result
 	may be NULL, simply return.

gcc/fortran/resolve.c

@@ -11488,6 +11488,27 @@ resolve_fl_variable_derived (gfc_symbol *sym, int no_init_flag)
 }
 
 
+/* F2008, C402 (R401):  A colon shall not be used as a type-param-value
+   except in the declaration of an entity or component that has the POINTER
+   or ALLOCATABLE attribute.  */
+
+static bool
+deferred_requirements (gfc_symbol *sym)
+{
+  if (sym->ts.deferred
+      && !(sym->attr.pointer
+	   || sym->attr.allocatable
+	   || sym->attr.omp_udr_artificial_var))
+    {
+      gfc_error ("Entity %qs at %L has a deferred type parameter and "
+		 "requires either the POINTER or ALLOCATABLE attribute",
+		 sym->name, &sym->declared_at);
+      return false;
+    }
+  return true;
+}
+
+
 /* Resolve symbols with flavor variable.  */
 
 static bool
@@ -11527,17 +11548,8 @@ resolve_fl_variable (gfc_symbol *sym, int mp_flag)
     }
 
   /* Constraints on deferred type parameter.  */
-  if (sym->ts.deferred
-      && !(sym->attr.pointer
-	   || sym->attr.allocatable
-	   || sym->attr.omp_udr_artificial_var))
-    {
-      gfc_error ("Entity %qs at %L has a deferred type parameter and "
-		 "requires either the pointer or allocatable attribute",
-		     sym->name, &sym->declared_at);
-      specification_expr = saved_specification_expr;
+  if (!deferred_requirements (sym))
     return false;
-    }
 
   if (sym->ts.type == BT_CHARACTER)
     {
@@ -13682,6 +13694,10 @@ resolve_fl_parameter (gfc_symbol *sym)
       return false;
     }
 
+  /* Constraints on deferred type parameter.  */
+  if (!deferred_requirements (sym))
+    return false;
+
   /* Make sure a parameter that has been implicitly typed still
      matches the implicit type, since PARAMETER statements can precede
      IMPLICIT statements.  */

gcc/testsuite/ChangeLog

 2016-09-04  Steven G. Kargl  <kargl@gcc.gnu.org>
 
+	PR fortran/77391
+	* gfortran.dg/pr77391.f90: New test.
+
+2016-09-04  Steven G. Kargl  <kargl@gcc.gnu.org>
+
 	PR fortran/77460
 	* gfortran.dg/pr77460.f90: New test.
 

gcc/testsuite/gfortran.dg/pr77391.f90

+! { dg-do compile }
+program picky
+character(len=:), parameter :: a="whoops" ! { dg-error "POINTER or ALLOCATABLE" }
+character(len=:) :: b="whoops" ! { dg-error "POINTER or ALLOCATABLE" }
+character(len=:) :: good
+pointer good
+end program picky