[Bug c++/66476] Erroneous initializer_list lifetime extension from temporary initializer_list
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66476 Ed Catmur changed: What|Removed |Added Status|REOPENED|RESOLVED Resolution|--- |INVALID --- Comment #3 from Ed Catmur --- Ah wait, guaranteed copy elision since C++17 should fix this, right? So g++ is actually correct now, even if it was wrong before.
[Bug c++/66476] Erroneous initializer_list lifetime extension from temporary initializer_list
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66476
Ed Catmur changed:
What|Removed |Added
Status|RESOLVED|REOPENED
Resolution|INVALID |---
--- Comment #2 from Ed Catmur ---
Yes... but the initializer_list that the array backs is itself temporary; it
has lifetime only for the duration of the call to the copy constructor.
From https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48562#c6 :
> I think that a warning against "({...})" would be useful too
>// fine
>initializer_list a{1, 2, 3};
>// this is bad
>initializer_list b({1, 2, 3});
> Second one is bad because it will destroy the array after initializing 'b',
> and won't lengthen the lifetime (because it will use the copy/move
> constructor).
[Bug c++/66476] Erroneous initializer_list lifetime extension from temporary initializer_list
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66476 Jason Merrill changed: What|Removed |Added Status|NEW |RESOLVED CC||jason at gcc dot gnu.org Resolution|--- |INVALID --- Comment #1 from Jason Merrill --- 11.6.4 [dcl.init.list] paragraph 6: The array has the same lifetime as any other temporary object (15.2), except that initializing an initializer_list object from the array extends the lifetime of the array exactly like binding a reference to a temporary. So the array shares the lifetime of the initializer_list.
[Bug c++/66476] Erroneous initializer_list lifetime extension from temporary initializer_list
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66476 Jonathan Wakely redi at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2015-06-09 Ever confirmed|0 |1
