QtCreator ctrl+click not work for auto keyword and map iterator, no auto complete

//代码占位符
#include <unistd.h>

#include <QApplication>
#include <map>
#include <memory>

#include <iostream
#include "mainwindow.h"

struct Point {
  int x;
  int y;
};

class Test {
 public:
  void func() {}
  int a_;
  std::map<int, Point> m;
};

int main(int argc, char *argv[]) {
  std::shared_ptr<Test> t1 = std::make_shared<Test>();
  t1->func();  // Works fine.
  auto t2 = std::make_shared<Test>();
  t2->func();  // -> not work
  t2->a_ = 1;  // -> not work

  std::map<int, Point> point_map;
  for (int i = 0; i < 10; ++i) {
    point_map[i] = {i, i};
  }
  for (auto it : point_map) {
    std::cout << it.first;     // it. not hint first
    std::cout << it.second.x;  // it.second not hint and .x not hint.
    std::cout << it.second.y;  // it.second not hint and .y not hint.
    std::cout << std::endl;
  }

  return 1;
}