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* [Bug c++/45492] New: G++ permits function-to-data pointer conversions with __extension__ in functions, but not function templates
@ 2010-09-02 0:29 jimb at red-bean dot com
2010-09-02 0:30 ` [Bug c++/45492] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 3+ messages in thread
From: jimb at red-bean dot com @ 2010-09-02 0:29 UTC (permalink / raw)
To: gcc-bugs
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With trunk G++:
$ ~/gcc/bin/g++ --version
g++ (GCC) 4.6.0 20100901 (experimental)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat fdc.cc
extern void cf();
// no warning
void *f() { return __extension__ (void *) cf; }
// warning:
// ISO C++ forbids casting between pointer-to-function and pointer-to-object
template<bool flag>
void *ft() { return __extension__ (void *) cf; }
template void *ft<true>();
$ LD_LIBRARY_PATH=$HOME/gcc/lib ~/gcc/bin/g++ -Wall -pedantic -c fdc.cc
fdc.cc: In function void* ft() [with bool flag = true]:
fdc.cc:11:25: instantiated from here
fdc.cc:9:44: warning: ISO C++ forbids casting between pointer-to-function and
pointer-to-object [enabled by default]
I would expect G++ to either complain about both casts, or neither; whether the
code appears in a function template shouldn't matter.
--
Summary: G++ permits function-to-data pointer conversions with
__extension__ in functions, but not function templates
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jimb at red-bean dot com
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45492
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/45492] G++ permits function-to-data pointer conversions with __extension__ in functions, but not function templates
2010-09-02 0:29 [Bug c++/45492] New: G++ permits function-to-data pointer conversions with __extension__ in functions, but not function templates jimb at red-bean dot com
@ 2010-09-02 0:30 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2010-09-02 0:30 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2010-09-02 00:30 -------
Related to PR 21385.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45492
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/45492] G++ permits function-to-data pointer conversions with __extension__ in functions, but not function templates
[not found] <bug-45492-4@http.gcc.gnu.org/bugzilla/>
@ 2012-05-29 11:53 ` paolo.carlini at oracle dot com
0 siblings, 0 replies; 3+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-05-29 11:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45492
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC|gcc-bugs at gcc dot gnu.org |
Resolution| |DUPLICATE
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-29 11:52:52 UTC ---
It's the same issue.
*** This bug has been marked as a duplicate of bug 21385 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-05-29 11:53 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2010-09-02 0:29 [Bug c++/45492] New: G++ permits function-to-data pointer conversions with __extension__ in functions, but not function templates jimb at red-bean dot com
2010-09-02 0:30 ` [Bug c++/45492] " pinskia at gcc dot gnu dot org
[not found] <bug-45492-4@http.gcc.gnu.org/bugzilla/>
2012-05-29 11:53 ` paolo.carlini at oracle dot com
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