c++ - C++ 怎么知道容器类有 push_back 函数？

Question

当我查看 std::back_insert_iterator http://en.cppreference.com/w/cpp/iterator/back_insert_iterator

它表示将调用容器的 push_back 方法。它如何知道容器是否有 push_back 方法？它是否需要一个扩展任何虚拟类的类，它在哪里定义？

Answer 1

It says the container's push_back method will be called. How does it know if the container has a method of push_back? Does it require a class that extends any virtual class and where is it defined?

不，push_back() 通常不是虚方法。

std::back_insert_iterator 是一个模板，它将在传递的对象上调用 push_back()。如果缺少该方法，您将遇到编译错误。