Finding an element in a shared_ptr container?

Question

I'm having a little problem with finding an element in a vector of shared_ptr.

Here is what I ended up with:

std::vector<std::shared_ptr<Block>> blocks;

bool contains(Block* block) {
  for (auto i = blocks.begin(); i != blocks.end(); ++i) {
    if ((*i).get() == block) {
      return true;
    }
  }
  return false;
}

However, I didn't managed to do it with std::find or even std::find_if. Is there a more c++ compliant way to achieve this ?

EDIT: This is the code I have after the answer:

bool contains(Block* block) {
  auto found = std::find_if(blocks.begin(), blocks.end(), [block](std::shared_ptr<Block> const& i){
    return i.get() == block;
  });
  return found != blocks.end();
}

Answer 1

Try:

std::find_if(blocks.begin(), blocks.end(), 
  [block](std::shared_ptr<Block> const& i){ return i.get() == block; });

Answer 2

Even simpler:

bool contains(Block* block) {
  return std::any_of(blocks.cbegin(), blocks.cend(),
                     [block](std::shared_ptr<Block> const& i) { return i.get() == block; });
}