{ int a = 1, b = 2, c = 3; std::initializer_list<int*> ptrList = {&a, &b, &c}; std::vector<std::unique_ptr<int>> uniquePtrVector = convertInitializerListToUniquePtrVector(ptrList); for (auto& uniquePtr : uniquePtrVector) { std::cout << *uniquePtr << " "; } retur...
其实for(initializer: list)中如果list是个形如:{a, b, c…},那么其实list自动被构造成了initializer_list对象。 #include<iostream> using namespace std; void print(initializer_list<int> list) { for (auto it = list.begin(); it != list.end(); ++it) cout << *it << " "; cout << end...
聚合是一个数组或类(第9条),没有用户声明的构造函数(12.1),没有私有或受保护的非静态数据成员(第...
一、概念 initializer_list是C++11中提供的一种标准库类型(ps:其实也是一个模板类),用于表示某种使用特定类型的值的数组。 initializer_list中的值都是常量值,无法修改。 二、提供的操作(以int型举例) 申明: initializer_list<int> lst; 也可以这样 initializer_list<int> lst{1,2,3,4}; 还可以这样 initializ...
เวอร์ชัน Visual Studio 2022 ค้นหา <ctime> <cuchar> <cvt-wbuffer> <cvt-wstring> <cwchar> <cwctype> <deque> <exception> <execution> <filesystem> <forward_list> <fstream> <functional> <future>
/* initializer_list是C++11新增的,可以使用它来初始化STL: 例如:std::vector payments {45.9,39.3,19.59,89.1}; 上述声明与下述代码等价(这里显式的将列表指定为构造函数参数): std::vector payments ({45.9,39.3,19.59,89.1}); 在C++11 可以使用{} 而不是() 来调用类的构造函数: shared_ptrpd{new doubl...
error C2440 :'initializing': cannot convert from'initializer list'to'Vector<int>'note: No constructor could take the source type,orconstructor overload resolution was ambiguous Here is the online result:https://godbolt.org/z/Njf6ym My question is: ...
<cwchar> <cwctype> <deque> <exception> <execution> <filesystem> <forward_list> <fstream> <functional> <future> <hash_map> <hash_set> <initializer_list> <initializer_list> initializer_list 类 <iomanip> <ios> <iosfwd> <iostream>
c5initializer_list<int> c5(move(c4));cout<<"c1 =";for(autoc : c1)cout<<" "<< c;cout<<endl;cout<<"c2 =";for(autoc : c2)cout<<" "<< c;cout<<endl;cout<<"c3 =";for(autoc : c3)cout<<" "<< c;cout<<endl;cout<<"c5 =";for(autoc : c5)cout<<" "<< c;cout<<endl...
-Reported Jun 26, 2024 4:20 PM [severity:It’s more difficult to complete my work] Following code produces wrong results: #include <initializer_list> #include <stdio.h> int main() { static constexpr struct { std::initializer_list<int> numbers; } items[] = { { ...