DR2233 not implemented

[Tambre__Raul]

template<typename ...T>
int f(int n = 0, T ...t);

int x = f<int>();

Godbolt
Per the wording change in DR2233 the above code should fail to compile.

GCC, Clang and MSVC all correctly reject this code.

[RahulV_intel]

Duplicate thread. Kindly refer to https://software.intel.com/en-us/forums/intel-c-compiler/topic/856652.