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* [Bug c++/106629] New: GCC accepts invalid program involving {1,2,3,4} as template argument
@ 2022-08-15 16:05 jlame646 at gmail dot com
2022-08-15 16:20 ` [Bug c++/106629] " pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: jlame646 at gmail dot com @ 2022-08-15 16:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106629
Bug ID: 106629
Summary: GCC accepts invalid program involving {1,2,3,4} as
template argument
Product: gcc
Version: 12.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jlame646 at gmail dot com
Target Milestone: ---
The following invalid program is accepted by gcc.
https://godbolt.org/z/Mb3qbvvPz
```
struct Impl
{
constexpr Impl(std::initializer_list<int>)
{
}
};
struct Bar{};
template<typename T, Impl impl>
struct Foo
{
};
int main()
{
constexpr Foo<Bar, {1,2,3,4}> foo; //works in msvc & gcc but rejected in
clang
return 0;
}
```
The program is invalid because `{1,2,3,4}` cannot be a template argument.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/106629] GCC accepts invalid program involving {1,2,3,4} as template argument
2022-08-15 16:05 [Bug c++/106629] New: GCC accepts invalid program involving {1,2,3,4} as template argument jlame646 at gmail dot com
@ 2022-08-15 16:20 ` pinskia at gcc dot gnu.org
2022-08-15 16:33 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-08-15 16:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106629
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 53462
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53462&action=edit
full testcase
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/106629] GCC accepts invalid program involving {1,2,3,4} as template argument
2022-08-15 16:05 [Bug c++/106629] New: GCC accepts invalid program involving {1,2,3,4} as template argument jlame646 at gmail dot com
2022-08-15 16:20 ` [Bug c++/106629] " pinskia at gcc dot gnu.org
@ 2022-08-15 16:33 ` pinskia at gcc dot gnu.org
2022-08-15 16:35 ` mpolacek at gcc dot gnu.org
2022-08-15 16:49 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-08-15 16:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106629
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2022-08-15
Keywords| |accepts-invalid
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>The program is invalid because `{1,2,3,4}` cannot be a template argument.
This is because braced-init-list is not included in constant-expression .
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/106629] GCC accepts invalid program involving {1,2,3,4} as template argument
2022-08-15 16:05 [Bug c++/106629] New: GCC accepts invalid program involving {1,2,3,4} as template argument jlame646 at gmail dot com
2022-08-15 16:20 ` [Bug c++/106629] " pinskia at gcc dot gnu.org
2022-08-15 16:33 ` pinskia at gcc dot gnu.org
@ 2022-08-15 16:35 ` mpolacek at gcc dot gnu.org
2022-08-15 16:49 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2022-08-15 16:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106629
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Not a bug, this is
https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#2450 I implemented
in GCC.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/106629] GCC accepts invalid program involving {1,2,3,4} as template argument
2022-08-15 16:05 [Bug c++/106629] New: GCC accepts invalid program involving {1,2,3,4} as template argument jlame646 at gmail dot com
` (2 preceding siblings ...)
2022-08-15 16:35 ` mpolacek at gcc dot gnu.org
@ 2022-08-15 16:49 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-08-15 16:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106629
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #3)
> Not a bug, this is
> https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#2450 I
> implemented in GCC.
Oh I see, I should have looked into the active defect reports too :).
Even though cppreference is not part of the C++ standard. It would be useful to
put a reference to that defect report on
https://en.cppreference.com/w/cpp/language/template_parameters .
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-08-15 16:49 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2022-08-15 16:05 [Bug c++/106629] New: GCC accepts invalid program involving {1,2,3,4} as template argument jlame646 at gmail dot com
2022-08-15 16:20 ` [Bug c++/106629] " pinskia at gcc dot gnu.org
2022-08-15 16:33 ` pinskia at gcc dot gnu.org
2022-08-15 16:35 ` mpolacek at gcc dot gnu.org
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