conversion1.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

// PR C++/2213
// Origin: [e-mail]
// Copyright (C), 2002 Free Software Foundation
// Contributed by Gabriel Dos Reis <[e-mail]>

// { dg-do compile } 
 
class QObject
{
};

int main()
{
  long long m;
  
  (void (QObject::*)()) m;    // { dg-error "invalid conversion" "" }
}