Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp1z/launder4.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 04ced10e8804 |
children |
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// { dg-do run { target c++11 } } // { dg-additional-options "-O2" } #include <cassert> void * operator new (decltype (sizeof (0)), void *p) { return p; } namespace std { template <typename T> T * launder (T *p) { return __builtin_launder (p); } } struct A { int& x; }; struct B { A a; }; int main () { int x = 42; B b{{x}}; int y = 666; new (&b.a) A{y}; assert(std::launder(&b.a)->x == 666); }