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* [Bug c++/84403] Possible further extension of constexpr: allow to use them as template parameters
[not found] <bug-84403-4@http.gcc.gnu.org/bugzilla/>
@ 2021-08-23 9:07 ` pinskia at gcc dot gnu.org
2021-08-23 10:31 ` redi at gcc dot gnu.org
2021-08-28 21:54 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-23 9:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84403
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/84403] Possible further extension of constexpr: allow to use them as template parameters
[not found] <bug-84403-4@http.gcc.gnu.org/bugzilla/>
2021-08-23 9:07 ` [Bug c++/84403] Possible further extension of constexpr: allow to use them as template parameters pinskia at gcc dot gnu.org
@ 2021-08-23 10:31 ` redi at gcc dot gnu.org
2021-08-28 21:54 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2021-08-23 10:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84403
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Daniel Fruzynski from comment #0)
> Values in constexpr functions are known at compile time,
No, not necessarily. You can call a constexpr function with runtime values too:
#include <type_traits>
constexpr int test(int n)
{
return std::integral_constant<int, n>::value;
}
int main(int argc, char**)
{
return test(argc);
}
So this is impossible to do. Function parameters are never constant
expressions.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/84403] Possible further extension of constexpr: allow to use them as template parameters
[not found] <bug-84403-4@http.gcc.gnu.org/bugzilla/>
2021-08-23 9:07 ` [Bug c++/84403] Possible further extension of constexpr: allow to use them as template parameters pinskia at gcc dot gnu.org
2021-08-23 10:31 ` redi at gcc dot gnu.org
@ 2021-08-28 21:54 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-28 21:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84403
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 70124 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-08-28 21:54 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-84403-4@http.gcc.gnu.org/bugzilla/>
2021-08-23 9:07 ` [Bug c++/84403] Possible further extension of constexpr: allow to use them as template parameters pinskia at gcc dot gnu.org
2021-08-23 10:31 ` redi at gcc dot gnu.org
2021-08-28 21:54 ` pinskia at gcc dot gnu.org
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