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[Bug fortran/56305] passing array of character with len>1 to c_loc
- From: "burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 13 Feb 2013 12:19:39 +0000
- Subject: [Bug fortran/56305] passing array of character with len>1 to c_loc
- Auto-submitted: auto-generated
- References: <bug-56305-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56305
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |burnus at gcc dot gnu.org
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2013-02-13 12:19:39 UTC ---
> The following code compiles, but shouldnt it be rejected?
It seems to be invalid Fortran 2003 but valid Fortran 2008 (w/ and w/o
TS29113). The gfortran's diagnostic handling for C_LOC still needs some changes
for -std=f2003, -std=f2008, -std=f2008ts (rejecting too much, some diagnostic
missing for -std=f2003).
Fortran 2003 has ("15.1.2.5 C LOC (X)"):
"Argument. X shall either
(1) have interoperable type and type parameters and be [...]
(2) be a nonpolymorphic scalar, have no length type parameters, and be [...]"
A type parameter of len=2 is not valid and also "c" is not a scalar â Thus, it
seems to be invalid.
However, it seems to be valid with Fortran 2008 ("15.2.3.6 C LOC (X)"); note
the change "type parameter" to "kind type parameter"
"Argument. X shall have either the POINTER or TARGET attribute. It shall not be
a coindexed object. It shall either be a variable with interoperable type and
kind type parameters, or be a scalar, nonpolymorphic variable with no length
type parameters. If it is allocatable, it shall be allocated. If it is a
pointer, it shall be associated. If it is an array, it shall be contiguous and
have nonzero size. It shall not be a zero-length string."
TS 29113 changes the latter as follows:
"{In 15.2.3.6 C_LOC(X), paragraph 3}
Delete 'scalar,'."