gistfile1.txt

__attribute__((noreturn)) void unreachable()
{
    __builtin_unreachable();
}

#define assume(x) if (x) ; else unreachable()

// Placement new without the null pointer check
template<class T, class... Args>
void construct(T* p, Args&&... args)
{
    assume(p);
    new(p) T(std::forward<Args>(args)...);
}