Page History

// library.h
struct S {
  virtual void f() { /* ... */ }
};
 
void func(S &s); // Implemented by the library, calls S::f()
 
// application.cpp
#include "library.h"
 
void fg() {
  S s;
  func(s);
}

// library.h
#include <type_traits>

struct S {
  void f() { /* ... */ } // No longer virtual
};
static_assert(std::is_standard_layout<S>::value, "S is required to be a standard layout type");

void func(S &s); // Implemented by the library, calls S::f()

// application.cpp
#include "library.h"

void fg() {
  S s;
  func(s);
}