A way for reading a file and put it as a byte array into a vector would be:
std::ifstream input(filePath, std::ios::binary);
std::vector<unsigned char> barray(std::istreambuf_iterator<char>(input), {});
As far as I understand, the constructor used for std::vector in the above code snippet is
template< class InputIt >
vector( InputIt first, InputIt last,
const Allocator& alloc = Allocator() );
Thus, the {} corresponds to last.
What is exactly {}? Is it acting like a null/empty iterator?
Thus, the {} corresponds to last.
What is exactly {}? Is it acting like a null/empty iterator?
It's a default constructed object of type std::istreambuf_iterator<char>.
std::vector<unsigned char> barray(std::istreambuf_iterator<char>(input), {});
is the same as
std::vector<unsigned char> barray{std::istreambuf_iterator<char>{input},
std::istreambuf_iterator<char>{}};