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  1. #include <utility>
  2. #include <algorithm>
  3.  
  4. template<typename... Features>
  5. struct Foo : Features...
  6. {
  7.     bool init()
  8.     {
  9.         typedef bool (Foo::*fptr)();
  10.         auto il = {static_cast<fptr>(&Features::init)...}; 
  11.         return std::all_of(il.begin(), il.end(), [&](fptr f){ return (this->*f)(); });
  12.     }
  13. };
  14.  
  15. #include <iostream>
  16.  
  17. using namespace std;
  18.  
  19. struct A { bool init() { cout << "Hello " << endl; return true; } };
  20. struct B { bool init() { cout << "Template " << endl; return true; } };
  21. struct C { bool init() { cout << "World!" << endl; return true; } };
  22.  
  23. int main()
  24. {
  25.     Foo<A, B, C> f;
  26.     bool res = f.init(); // Prints "Hello Template World!"
  27.     cout << res; // Prints 1
  28. }
Success #stdin #stdout 0s 2852KB
comments (?)
stdin 
Standard input is empty
stdout 
Hello 
Template 
World!
1
https://ideone.com/t8UBgy
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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