nested_classes.d

void func()
{
    int m;

    class Inner
    {
        int foo()
        {
            return m; // Ok to access local variable m of func()
        }
    }
}

void func()
{
    int m;
    static int n;

    static class Inner
    {
        int foo()
        {
            return m;   // Error, Inner is static and m is local to the stack
            return n;   // Ok, n is static
        }
    }
}