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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class empty
  5. {};
  6.  
  7.     template <class Base, int c=1>
  8.     struct add_chars : Base {
  9.         char dummy[c];
  10.     };
  11.  
  12.     template <class T>
  13.     struct has_trailing_unused_space {
  14.         static const bool result = sizeof (add_chars<T>) == sizeof (T);
  15.     };
  16.  
  17.     int main() {
  18.         std::cout << "empty has trailing space: ";
  19.         std::cout << has_trailing_unused_space<empty>::result;
  20.     }
  21.  
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
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Standard input is empty
stdout
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empty has trailing space: 1
https://ideone.com/lsGfJ9
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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