typedef std::shared_ptr<FinalLightStatus> FinalLightStatusPtr; 1. 这两个语句分别使用了using和typedef来创建类型别名。 using FinalLightStatusPtr = std::shared_ptr<FinalLightStatus>; 1. 这个语句使用了C++11引入的using关键字来创建类型别名,本质上是为std::shared_ptr<FinalLightStatus>这个类型取了一个...
using namespace std; 2. 类型别名(typedef的升级版)using 可以用来定义类型别名,这种方式更加直观和灵活,类似于C语言中的 typedef。定义类型别名: using NewTypeName = OriginalTypeName; 例如: using SP_TRADE_API = std::shared_ptr<CLocalTraderApi>; 3...
// 使用typedef进行类型别名定义typedefintInteger;Integer a=10;// 等价于 int a = 10;// 使用using进行类型别名定义usingIntegerAlias=int;IntegerAlias b=20;// 等价于 int b = 20;// 复杂类型的别名usingComplexType=std::vector<std::shared_ptr<int>>;ComplexType vec;// 等价于 std::vector<std::...
class A{protected:structConstructorAcess{explicitConstructorAcess(int){}};public:A(constConstructorAcess&,string){}staticshared_ptr<A>create(string str){returnmake_shared<A>(ConstructorAcess{0},str);}private:string _str;};shared_ptr<A>pa=A::create("hello");//正确Aa(A::ConstructorAcess{0},...
任何情况下都不要using namespace std从理论上来说也是有道理的：因为系统库可能会升级，这样升级编译...
void print_vector(std::shared_ptr<vector<int>> p) { for (auto i : *p) std::cout << i << std::endl; } int main() { auto p = alloc_vector(); assign_vector(p); print_vector(p); return 0; } #include <iostream> #include <memory> ...
std::shared_ptr<azure::mobile::table> todoTable; The todoTable is used to define a proxy class for the database table. In the file MainPage.xaml.cpp, add an include statement for the mobile service header file. The path and name of this file depends on the name you chose for your...
return std::shared_ptr<Bad>(this); } ~Bad() { std::cout << "Bad::~Bad() called" << std::endl; } }; int main() { // 错误的示例,每个shared_ptr都认为自己是对象仅有的所有者 std::shared_ptr<Bad> bp1(new Bad()); std::shared_ptr<Bad> bp2 = bp1->getptr(); ...
typedef std::shared_ptr<Processor> Ptr; SimPort<MemReq> MemReqPort; SimPort<MemRsp> MemRspPort; Processor(const ArchDef& arch); Processor(const SimContext& ctx, const ArchDef& arch); ~Processor(); void attach_ram(RAM* mem); int run(); bool check_exit(int* exitcode); void step(uint...
std::unique_ptr<Engine>createEngine(); It is clear and hard to ignore that ownership is passed to the caller. This won't build: {Engine*engine=createEngine();engine->start();} But this builds and does not leak: {std::unique_ptr<Engine>engine=createEngine();engine->start();// No ...