std::find on a vector of object pointers

Question

I have a class A with a member which is a vector of object pointers of another class B

class A
{
    std::vector m_member_A
<         


        

Answer 1

If you want to find a value pointer at by the pointer, instead of a given pointer, you can use std::find_if with a suitable functor:

struct Foo
{
  int i;
};

bool operator==(const Foo& lhs, const Foo& rhs) { return lhs.i == rhs.i; }

std::vector v = ....;

Foo f{42};

std::find_if(v.begin(), v.end(), [&f](const Foo* p) { return *p == f; });