Jtdylktuy

I have following example

#include <cstdint>



class FooC

{

public:

   FooC(uint16_t iPort, uint16_t iPin)

   : PORT(iPort)

   , PIN(iPin)

   {

   };



   ~FooC() = default;



   FooC() = delete;

   FooC(const FooC&) = delete;

   FooC(FooC&&) = delete;



private:

   const uint16_t PORT;

   const uint16_t PIN;

};



int main()

{

    FooC array[2] = {

       FooC(1,2),

       FooC(3,4)

    };

}

and I don't want to call the default, move and copy constructor. Due to that I deleted the functions. Unfortunately this results in following error (compiled with C++11)

: In function 'int main()':

:28:5: error: use of deleted function 'FooC::FooC(FooC&&)'

 };



 ^

:16:4: note: declared here

FooC(FooC&&) = delete;



^~~~

:28:5: error: use of deleted function 'FooC::FooC(FooC&&)'

 };



 ^

:16:4: note: declared here

FooC(FooC&&) = delete;



^~~~

Compiler returned: 1

Is it possible to force in this example the calling of constructor with the parameters and still delete the default, move and copy constructor?

In C++11 and C++14, you can use nested braces:

FooC array[2] = {{1,2}, {3,4}};

In C++17 your code should already work as written thanks to the new prvalue/materialization rules ("guaranteed copy elision").

Is it possible to force in this example the calling of constructor with the parameters and still delete the default, move and copy constructor?

No with your current syntax (before C++17) and yes (in C++17).

Pre-C++17:

This is not possible. The aggregate initialization copies the initializers into the aggregate. This means you have to have an accessible copy/move constructor. In C++11 you have to pass the constructor parameters as their own braced-init-list. This means you aren't copying FooC's but instead copy-list-initializing the FooC's in the array which calls the 2 parameter constructor instead of the copy/move constructor.

FooC array[2] = {

   {1, 2},

   {3, 4}

};

C++17:

You no longer have temporary objects in the braced-init-list and each element of the array will be directly initialized instead of copy initialized.