Re: beginner question

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.c++

Date:

Thu, 15 May 2008 20:45:12 -0700

Message-ID:

<Nr7Xj.171$J43.113@newsfe05.lga>

Carter wrote:

Hi everyone,

This is another beginner question. I am having problems debugging some
code I am getting the error:

vertex.C: In member function ?void vertex::set_chain_h(const
std::auto_ptr<boost::shared_ptr<chain> >&)?:
vertex.C:25: error: passing ?const
std::auto_ptr<boost::shared_ptr<chain> >? as ?this? argument of
?std::auto_ptr<_Tp>::operator std::auto_ptr_ref<_Tp1>() [w
ith _Tp1 = boost::shared_ptr<chain>, _Tp = boost::shared_ptr<chain>]?
discards qualifiers

which I do not quite understand in this case. Any help is appreciated.

Thanks in advance,

Carter.
(Code follows)

class XXX
{
public:
void set_chain_h( std::auto_ptr< boost::shared_ptr<chain> > const

The const means "I am not going to be changing any variables of this
instance.

& h)
{ _chain_h = h; }

And here you try to change a variable of the instant.

private:
std::auto_ptr< boost::shared_ptr<chain> > _chain_h;

};

Either remove the const, remove the assignment, or do something else.

--
Jim Langston
tazmaster@rocketmail.com