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template <typename T>
std::shared_ptr<std::vector<T>> BlobPtr<T>::check(std::size_t i, std::string& msg) const
{
	auto ret = wptr.lock();
	if (!ret)
		throw std::runtime_error("Unbound BlobPtr");
	if (i >= ret->size())
		throw std::out_of_range(msg);
	return ret;
}
 
template <typename T>
BlobPtr<T>& BlobPtr<T>::operator++()
{
	check(curr, std::string("Increment past end"));
	++curr;
	return *this;
}
 
template <typename T>
BlobPtr<T>& BlobPtr<T>::operator--()
{
	check(curr, "Decrement before begin");
	--curr;
	return *this;
}

prog.cpp:2:6: error: ‘shared_ptr’ in namespace ‘std’ does not name a template type
 std::shared_ptr<std::vector<T>> BlobPtr<T>::check(std::size_t i, std::string& msg) const
      ^~~~~~~~~~
prog.cpp:13:1: error: ‘BlobPtr’ does not name a type
 BlobPtr<T>& BlobPtr<T>::operator++()
 ^~~~~~~
prog.cpp:21:1: error: ‘BlobPtr’ does not name a type
 BlobPtr<T>& BlobPtr<T>::operator--()
 ^~~~~~~

Standard output is empty