re PR fortran/20897 (derived type name shall not be same as intrinsic type name)

PR fortran/20897
fortran/
* decl.c (gfc_match_derived_decl): Reliably reject
'doubleprecision' and 'doublecomplex' as type names.
testsuite/
* gfortran.dg/derived_name_1.f90: New.
* gfortran.dg/derived_name_2.f: New.

From-SVN: r123129

gcc/fortran/ChangeLog

+2007-03-22  Tobias Schlter  <tobi@gcc.gnu.org>
+
+	PR fortran/20897
+	* decl.c (gfc_match_derived_decl): Reliably reject
+	'doubleprecision' and 'doublecomplex' as type names.
+
 2007-03-19  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
 
 	PR fortran/31203

gcc/fortran/decl.c

@@ -4341,12 +4341,16 @@ loop:
     return m;
 
   /* Make sure the name isn't the name of an intrinsic type.  The
-     'double precision' type doesn't get past the name matcher.  */
+     'double {precision,complex}' types don't get past the name
+     matcher, unless they're written as a single word or in fixed
+     form.  */
   if (strcmp (name, "integer") == 0
       || strcmp (name, "real") == 0
       || strcmp (name, "character") == 0
       || strcmp (name, "logical") == 0
-      || strcmp (name, "complex") == 0)
+      || strcmp (name, "complex") == 0
+      || strcmp (name, "doubleprecision") == 0
+      || strcmp (name, "doublecomplex") == 0)
     {
       gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic "
 		 "type", name);

gcc/testsuite/ChangeLog

+2007-03-22  Tobias Schlter  <tobi@gcc.gnu.org>
+
+	PR fortran/20897
+	* gfortran.dg/derived_name_1.f90: New.
+	* gfortran.dg/derived_name_2.f: New.
+
 2007-03-21  Richard Sandiford  <richard@codesourcery.com>
 
 	* lib/target-supports.exp (check_effective_target_nonpic): New

gcc/testsuite/gfortran.dg/derived_name_1.f90

+! { dg-do compile }
+! PR 20897
+! Make sure intrinsic type names do not appear as names of derived types
+type integer ! { dg-error "cannot be the same as an intrinsic type" }
+type real    ! { dg-error "cannot be the same as an intrinsic type" }
+type complex ! { dg-error "cannot be the same as an intrinsic type" }
+type character ! { dg-error "cannot be the same as an intrinsic type" }
+type logical ! { dg-error "cannot be the same as an intrinsic type" }
+type complex ! { dg-error "cannot be the same as an intrinsic type" }
+type double precision ! { dg-error "Unclassifiable statement" }
+type doubleprecision ! { dg-error "cannot be the same as an intrinsic type" }
+type double complex ! { dg-error "Unclassifiable statement" }
+type doublecomplex ! { dg-error "cannot be the same as an intrinsic type" }
+
+type x
+   integer y
+end type x
+end
+

gcc/testsuite/gfortran.dg/derived_name_2.f

+! { dg-do compile }
+! PR 20897
+! Make sure intrinsic type names do not appear as names of derived types
+      type integer     ! { dg-error "cannot be the same as an intrinsic type" }
+      type real        ! { dg-error "cannot be the same as an intrinsic type" }
+      type complex     ! { dg-error "cannot be the same as an intrinsic type" }
+      type character   ! { dg-error "cannot be the same as an intrinsic type" }
+      type logical     ! { dg-error "cannot be the same as an intrinsic type" }
+      type complex     ! { dg-error "cannot be the same as an intrinsic type" }
+      type double precision     ! { dg-error "cannot be the same as an intrinsic type" }
+      type doubleprecision      ! { dg-error "cannot be the same as an intrinsic type" }
+      type double complex       ! { dg-error "cannot be the same as an intrinsic type" }
+      type doublecomplex        ! { dg-error "cannot be the same as an intrinsic type" }
+
+      type x
+      integer y
+      end type x
+      end
+