diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/cpp1z/launder3.C')
-rw-r--r-- | gcc/testsuite/g++.dg/cpp1z/launder3.C | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp1z/launder3.C b/gcc/testsuite/g++.dg/cpp1z/launder3.C new file mode 100644 index 00000000000..2a2afc5cad1 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp1z/launder3.C @@ -0,0 +1,38 @@ +// { 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 +{ + const int x; +}; + +struct B +{ + A a; +}; + +int +main () +{ + B b{{42}}; + new (&b.a) A{666}; + assert(std::launder(&b.a)->x == 666); +} |