C++11 initialize array with uniform value in constexpr function
- by marack
I have a class template which builds a simple array based on the template parameters as one of its members. I need to be able to initialize every element in the array to a single value in one of the constructors. Unfortunately this constructor must be constexpr.
The relevant part boils down to:
template <typename T, size_t N>
class foo
{
T data[N];
constexpr foo(T val)
{
// initialize data with N copies of val
}
};
Using std::fill or a loop is incompatible with the constexpr requirement. Initializing with : data{val} only sets the first element of the array and zero-initializes the remainder.
How can this be achieved?
I feel like there should be a solution with variadic templates and tuples etc...
