Method contains

include/boost/asio/detail/call_stack.hpp:94–104

Determine whether the specified owner is on the stack. Returns address of key if present, 0 otherwise.

  // Determine whether the specified owner is on the stack. Returns address of
  // key if present, 0 otherwise.
  static Value* contains(Key* k)
  {
    context* elem = top_;
    while (elem)
    {
      if (elem->key_ == k)
        return elem->value_;
      elem = elem->next_;
    }
    return 0;
  }

  // Obtain the value at the top of the stack.
  static Value* top()