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std::priority_queue::pop(3)    C++ Standard Libary   std::priority_queue::pop(3)

NAME
     std::priority_queue::pop - std::priority_queue::pop

Synopsis
	void pop();

	Removes the top element from the priority queue. Effectively calls
	std::pop_heap(c.begin(), c.end(), comp); c.pop_back();.

Parameters
	(none)

Return value
	(none)

Complexity
	Logarithmic   number   of   comparisons  plus  the  complexity	of  Con-
     tainer::pop_back.

Example
     // Run this code

      #include <iostream>
      #include <queue>

      struct Event
      {
	  int priority{};
	  char data{' '};

	  friend bool operator<(Event const& lhs, Event const& rhs)
	  {
	      return lhs.priority < rhs.priority;
	  }

	  friend std::ostream& operator<<(std::ostream& os, Event const& e)
	  {
	      return os << '{' << e.priority << ", '" << e.data << "'}";
	  }
      };

      int main()
      {
	  std::priority_queue<Event> events;

	  std::cout << "Fill the events queue:\t";

	  for (auto const e : {Event{6,'L'}, {8,'I'}, {9,'S'}, {1,'T'}, {5,'E'},
     {3,'N'}})
	  {
	      std::cout << e << ' ';
	      events.push(e);
	  }

	  std::cout << "\nProcess events:\t\t";

	  for (; !events.empty(); events.pop())
	  {
	      Event const& e = events.top();
	      std::cout << e << ' ';
	  }

	  std::cout << '\n';
      }

Output:
      Fill the events queue:  {6, 'L'} {8, 'I'} {9, 'S'} {1, 'T'} {5,  'E'}  {3,
     'N'}
      Process  events:		{9, 'S'} {8, 'I'} {6, 'L'} {5, 'E'} {3, 'N'} {1,
     'T'}

See also
	emplace constructs element in-place and sorts the underlying container
	(C++11) (public member function)
	push	inserts element and sorts the underlying container
		(public member function)
	top	accesses the top element
		(public member function)

http://cppreference.com 	   2024.06.10	     std::priority_queue::pop(3)
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