lvaddr.c

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

// Copyright (C) 2002 Free Software Foundation
// Contributed by Matt Austern <[e-mail]>

// { dg-do compile }

void f()
{
  int n;
  char* p = &(char) n;		// { dg-error "non-lvalue" }
}