* [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization
@ 2007-12-17 20:31 Tobias Burnus
2007-12-24 14:35 ` Tobias Burnus
2007-12-24 16:31 ` Jerry DeLisle
0 siblings, 2 replies; 3+ messages in thread
From: Tobias Burnus @ 2007-12-17 20:31 UTC (permalink / raw)
To: gcc-patches, 'fortran@gcc.gnu.org'
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It is completely unclear what value "n" has after:
integer :: n = 4
dimension :: n(3)
similarly invalid is:
integer :: n = 5
parameter (n = 7)
This patch adds checks to reject this.
Please try to come up with things which should be rejected; I think
there are none, but I still might have missed something. ;-)
Build and regtested on x86-64. OK for the trunk?
Tobias
PS: I did not check the standard, but ifort and NAG f95 reject it. As it
makes sense, I believe these compilers. If needed be, I can still try to
find it in the standard.
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2007-12-17 Tobias Burnus <burnus@net-b.de>
PR fortran/34514
* decl.c (attr_decl1): Reject specifying the DIMENSION for
already initialized variable.
(do_parm): Reject PARAMETER for already initialized variable.
2007-12-17 Tobias Burnus <burnus@net-b.de>
PR fortran/34514
* gfortran.dg/initialization_17.f90: New.
Index: gcc/fortran/decl.c
===================================================================
--- gcc/fortran/decl.c (revision 131009)
+++ gcc/fortran/decl.c (working copy)
@@ -5151,6 +5151,14 @@ attr_decl1 (void)
goto cleanup;
}
+ if (current_attr.dimension && sym->value)
+ {
+ gfc_error ("Dimensions specified for %s at %L after its "
+ "initialisation", sym->name, &var_locus);
+ m = MATCH_ERROR;
+ goto cleanup;
+ }
+
if ((current_attr.allocatable || current_attr.pointer)
&& (m == MATCH_YES) && (as->type != AS_DEFERRED))
{
@@ -5753,6 +5761,13 @@ do_parm (void)
goto cleanup;
}
+ if (sym->value)
+ {
+ gfc_error ("Initializing already initialized variable at %C");
+ m = MATCH_ERROR;
+ goto cleanup;
+ }
+
if (sym->ts.type == BT_CHARACTER
&& sym->ts.cl != NULL
&& sym->ts.cl->length != NULL
Index: gcc/testsuite/gfortran.dg/initialization_17.f90
===================================================================
--- gcc/testsuite/gfortran.dg/initialization_17.f90 (revision 0)
+++ gcc/testsuite/gfortran.dg/initialization_17.f90 (revision 0)
@@ -0,0 +1,10 @@
+! { dg-do compile }
+!
+! PR fortran/34514
+!
+! Initialization and typespec changes.
+!
+integer :: n = 5, m = 7
+parameter (n = 42) ! { dg-error "Initializing already initialized variable" }
+dimension :: m(3) ! { dg-error "after its initialisation" }
+end
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization
2007-12-17 20:31 [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization Tobias Burnus
@ 2007-12-24 14:35 ` Tobias Burnus
2007-12-24 16:31 ` Jerry DeLisle
1 sibling, 0 replies; 3+ messages in thread
From: Tobias Burnus @ 2007-12-24 14:35 UTC (permalink / raw)
To: gcc-patches, 'fortran@gcc.gnu.org'
*PING*
http://gcc.gnu.org/ml/fortran/2007-12/msg00221.html
Tobias Burnus wrote:
> It is completely unclear what value "n" has after:
>
> integer :: n = 4
> dimension :: n(3)
>
>
> similarly invalid is:
> integer :: n = 5
> parameter (n = 7)
>
> This patch adds checks to reject this.
>
[...]
> Build and regtested on x86-64. OK for the trunk?
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization
2007-12-17 20:31 [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization Tobias Burnus
2007-12-24 14:35 ` Tobias Burnus
@ 2007-12-24 16:31 ` Jerry DeLisle
1 sibling, 0 replies; 3+ messages in thread
From: Jerry DeLisle @ 2007-12-24 16:31 UTC (permalink / raw)
To: Tobias Burnus; +Cc: gcc-patches, 'fortran@gcc.gnu.org'
Tobias Burnus wrote:
> It is completely unclear what value "n" has after:
>
> integer :: n = 4
> dimension :: n(3)
>
>
> similarly invalid is:
> integer :: n = 5
> parameter (n = 7)
>
> This patch adds checks to reject this.
>
> Please try to come up with things which should be rejected; I think
> there are none, but I still might have missed something. ;-)
>
> Build and regtested on x86-64. OK for the trunk?
>
> Tobias
>
> PS: I did not check the standard, but ifort and NAG f95 reject it. As it
> makes sense, I believe these compilers. If needed be, I can still try to
> find it in the standard.
>
OK to commit
Jerry
^ permalink raw reply [flat|nested] 3+ messages in thread
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2007-12-17 20:31 [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization Tobias Burnus
2007-12-24 14:35 ` Tobias Burnus
2007-12-24 16:31 ` Jerry DeLisle
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