c++11 - C++ How to create a std::unique_ptr from a class that takes parameters on constructor -

i need create std::unique_ptr class has constructor takes 1 parameter. can´t find references on how it. here code example cannot compile:

#include <iostream> #include <string> #include <sstream> #include <memory>  class myclass {      public:         myclass(std::string name);         virtual ~myclass();      private:          std::string myname; };  myclass::myclass(std::string name) : myname(name) {} myclass::~myclass() {}  class otherclass {      public:         otherclass();         virtual ~otherclass();          void myfunction(std::string data);          std::unique_ptr<myclass> theclassptr; };  otherclass::otherclass() {} otherclass::~otherclass() {}  void otherclass::myfunction(std::string data) {     std::unique_ptr<myclass> test(data); <---------- problem here!     theclassptr = std::move(test); }  int main() {     otherclass test;     test.myfunction("this test"); } 

the errors related way i´m initializing std::unique_ptr, pointed out in code.

the original code , errors can found here.

thanks helping me solve that.

you can do:

std::unique_ptr<myclass> test(new myclass(data)); 

or if have c++14

auto test = std::make_unique<myclass>(data); 

but:

in provided example there no need create temporary variable, can use reset method of class member:

theclassptr.reset(new myclass(data));