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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) -- links below jump to the message on this page -- [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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