fork download
copy 
  1. #include <iostream>
  2.  
  3. class Base
  4. {
  5. protected:
  6.     template<typename ...Args>
  7.     Base(Args ...args)
  8.     {
  9.         std::cout << "variadic ctor" << std::endl;
  10.     }
  11.  
  12.     template<typename T>
  13.     Base(T t)
  14.     {
  15.         std::cout << "template ctor" << std::endl;
  16.     }
  17.  
  18.     Base(char const *s)
  19.     {
  20.         std::cout << s << std::endl;
  21.     }
  22. };
  23.  
  24. class Derived : public Base
  25. {
  26. protected:
  27.     using Base::Base;
  28. };
  29.  
  30. int main(int, char**) noexcept
  31. {
  32.     //Base bv{ 0, 1 }; // error: 'Base::Base(Args ...) [with Args = {int, int}]' is protected within this context
  33.     //Base bt{ 0 }; // error: 'Base::Base(T) [with T = int]' is protected within this context
  34.     //Base bs{ "base" }; // error: 'Base::Base(const char*)' is protected within this context
  35.     Derived dv{ 0, 1 };
  36.     Derived dt{ 0 };
  37.     //Derived ds{ "derived" }; // error: 'Derived::Derived(const char*)' is protected within this context
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
variadic ctor
template ctor
https://ideone.com/5JVFxc
inherited ctor bug
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!