text: 
  // no #include guard
  
  // Copyright (C) 2008-2018 Lorenzo Caminiti
  // Distributed under the Boost Software License, Version 1.0 (see accompanying
  // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
  // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
  
  // Test error if non-static inv declared static (unless PERMISSIVE #defined).
  
  #include <boost/contract/public_function.hpp>
  #include <boost/contract/check.hpp>
  
  struct a {
      static void invariant() {}
  
      void f() {
          // Same for ctor and dtor (because they all use check_pre_post_inv).
          boost::contract::check c = boost::contract::public_function(this);
      }
  };
  
  int main() {
      a aa;
      aa.f();
      return 0;
  };
  
  