| // PR c++/57901 | |
| // { dg-require-effective-target c++11 } | |
| struct Z { | |
| Z() = default; | |
| Z(Z const&) = default; | |
| constexpr Z(Z&&) {} /* non-trivial (constexpr) move ctor */ | |
| }; | |
| template<typename T> | |
| constexpr int fn0(T v) { return 0; } | |
| template<typename T> | |
| constexpr int fn (T v) { return fn0(v); } | |
| constexpr auto t0 = fn0(Z()); // OK! | |
| constexpr auto t = fn (Z()); // error! (GCC 4.8.1) |