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* [Bug c++/115430] New: Cannot take address of template function
@ 2024-06-11 9:27 thomaspkhealy at yahoo dot com
2024-06-11 15:22 ` [Bug c++/115430] " pinskia at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: thomaspkhealy at yahoo dot com @ 2024-06-11 9:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115430
Bug ID: 115430
Summary: Cannot take address of template function
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: thomaspkhealy at yahoo dot com
Target Milestone: ---
template<typename... Params>
constexpr int Func(Params&&...)
{
return 0;
}
int main(void)
{
constexpr auto fp1 = &Func<int,double,float>; // compiles
constexpr auto fp2 = (nullptr, &Func<int,double,float>); // doesn't
compile
}
The above program compiles without failure on LLVM clang, Microsoft Visual C++
and Intel ICX. But GNU g++ fail to compile it:
<source>: In function 'int main()':
<source>:10:36: error: no context to resolve type of '& Func<int, double,
float>'
10 | constexpr auto fp2 = (nullptr, &Func<int,double,float>); //
doesn't compile
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/115430] Cannot take address of template function
2024-06-11 9:27 [Bug c++/115430] New: Cannot take address of template function thomaspkhealy at yahoo dot com
@ 2024-06-11 15:22 ` pinskia at gcc dot gnu.org
2024-06-11 15:31 ` pinskia at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-06-11 15:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115430
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2024-06-11
Ever confirmed|0 |1
Known to fail| |4.5.3
Status|UNCONFIRMED |NEW
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced (and modified to be C++98):
```
template<typename T>
int Func(T);
typedef int (*funcptrtype)(int);
funcptrtype fp1 = &Func<int>;
funcptrtype fp2 = (0, &Func<int>);
```
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/115430] Cannot take address of template function
2024-06-11 9:27 [Bug c++/115430] New: Cannot take address of template function thomaspkhealy at yahoo dot com
2024-06-11 15:22 ` [Bug c++/115430] " pinskia at gcc dot gnu.org
@ 2024-06-11 15:31 ` pinskia at gcc dot gnu.org
2024-06-25 21:33 ` mpolacek at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-06-11 15:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115430
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |3.4.6
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note GCC 4.4.7 and before gave the following error message:
<source>:5: error: argument of type 'void' does not match 'int (*)(int)'
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/115430] Cannot take address of template function
2024-06-11 9:27 [Bug c++/115430] New: Cannot take address of template function thomaspkhealy at yahoo dot com
2024-06-11 15:22 ` [Bug c++/115430] " pinskia at gcc dot gnu.org
2024-06-11 15:31 ` pinskia at gcc dot gnu.org
@ 2024-06-25 21:33 ` mpolacek at gcc dot gnu.org
2024-07-01 19:08 ` cvs-commit at gcc dot gnu.org
2024-07-01 19:09 ` mpolacek at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2024-06-25 21:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115430
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
CC| |mpolacek at gcc dot gnu.org
Status|NEW |ASSIGNED
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Testing a patch.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/115430] Cannot take address of template function
2024-06-11 9:27 [Bug c++/115430] New: Cannot take address of template function thomaspkhealy at yahoo dot com
` (2 preceding siblings ...)
2024-06-25 21:33 ` mpolacek at gcc dot gnu.org
@ 2024-07-01 19:08 ` cvs-commit at gcc dot gnu.org
2024-07-01 19:09 ` mpolacek at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2024-07-01 19:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115430
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Marek Polacek <mpolacek@gcc.gnu.org>:
https://gcc.gnu.org/g:c847dcf94499da62e5a28921b404e6e561645d99
commit r15-1759-gc847dcf94499da62e5a28921b404e6e561645d99
Author: Marek Polacek <polacek@redhat.com>
Date: Tue Jun 25 17:42:01 2024 -0400
c++: unresolved overload with comma op [PR115430]
This works:
template<typename T>
int Func(T);
typedef int (*funcptrtype)(int);
funcptrtype fp0 = &Func<int>;
but this doesn't:
funcptrtype fp2 = (0, &Func<int>);
because we only call resolve_nondeduced_context on the LHS (via
convert_to_void) but not on the RHS, so cp_build_compound_expr's
type_unknown_p check issues an error.
PR c++/115430
gcc/cp/ChangeLog:
* typeck.cc (cp_build_compound_expr): Call
resolve_nondeduced_context
on RHS.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/noexcept41.C: Remove dg-error.
* g++.dg/overload/addr3.C: New test.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/115430] Cannot take address of template function
2024-06-11 9:27 [Bug c++/115430] New: Cannot take address of template function thomaspkhealy at yahoo dot com
` (3 preceding siblings ...)
2024-07-01 19:08 ` cvs-commit at gcc dot gnu.org
@ 2024-07-01 19:09 ` mpolacek at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2024-07-01 19:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115430
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed on trunk. I think I'll backport the fix to 14 as well.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2024-07-01 19:09 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2024-06-11 9:27 [Bug c++/115430] New: Cannot take address of template function thomaspkhealy at yahoo dot com
2024-06-11 15:22 ` [Bug c++/115430] " pinskia at gcc dot gnu.org
2024-06-11 15:31 ` pinskia at gcc dot gnu.org
2024-06-25 21:33 ` mpolacek at gcc dot gnu.org
2024-07-01 19:08 ` cvs-commit at gcc dot gnu.org
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