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stl_vector::insert_aux源码 template <class T, class Alloc> void vector<T, Alloc>::insert_aux(iterator position, const T& x) { if (finish != end_of_storage) {//如果还有备用空间 construct(finish, *(finish - 1));//在备用空间开头构造一个对象,以最后一个元素为对象内容

#ifndef HELPER_INFO_H #define HELPER_INFO_H //辅助宏 #define __endline cout << endl; #define __fname__ cout << endl << endl << "========= " << __PRETTY_FUNCTION__<< " ==========" << endl; #include <iostream>.