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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67768] Second and subsequent captured variable in variadic template unpaking are default constructed
Date: Mon, 23 Aug 2021 07:20:58 +0000	[thread overview]
Message-ID: <bug-67768-4-zNyVihinZj@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-67768-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67768

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED
   Target Milestone|---                         |8.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 8. Here is a self contained testcase (no libstdc++ involved):
template<int I,class T>T echo(T v) { return v; }

template<typename ...T> struct run1;
template<> struct run1<>{};
template<typename T> struct run1<T>{run1(T a){a();}};
template<typename T, typename ...T1>
struct run1<T, T1...>
  : run1<T1...>{run1(T a, T1... b) : run1<T1...>(b...) {a();}};

template<typename ...T>
void run11(T... a)
{
  run1<T...>(a...);
}
template<int... Is>void run(void)
{
    int x = 10;
    run11(echo<Is>([y=x](){if (y!=10) __builtin_abort();})...);
}
int main()
{
    run<0,1,2>();
}

-------- CUT ----------

      reply	other threads:[~2021-08-23  7:20 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-29 15:02 [Bug c++/67768] New: " dtyazskwindows7 at gmail dot com
2021-08-23  7:20 ` pinskia at gcc dot gnu.org [this message]

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