Class derived_from_path

test/path_test.cpp:92–112

namespace {

class derived_from_path :
    public fs::path
{
public:
    derived_from_path() {}
    derived_from_path(derived_from_path const& that) : fs::path(static_cast< fs::path const& >(that)) {}
    template< typename T >
    derived_from_path(T const& that) : fs::path(that) {}

    derived_from_path& operator= (derived_from_path const& that)
    {
        *static_cast< fs::path* >(this) = that;
        return *this;
    }
    template< typename T >
    derived_from_path& operator= (T const& that)
    {
        *static_cast< fs::path* >(this) = that;
        return *this;
    }
};

class convertible_to_path
{