Re: [boost] Proposal: XML APIs in boost

From: Reece Dunn (msclrhd_at_[hidden])
Date: 2005-11-05 16:43:15

Stefan Seefeld wrote:
> So we agree then, fine. I suggest 'append_comment("foo")' while someone else
> proposed to overload the 'append' name, using something like 'append(comment("foo"))'
> instead, which would imply explicit node creation, as opposed to nodes being
> created by factories (such as document and element).

It is possible to support append( comment( "foo" )) *and* factories:

template< typename NodeType >
struct node_constructor
{
    typedef NodeType type;
    std::string value;
    node_constructor( const std::string & str ): value( str )
    {
    }
};

node_constructor< comment_factory > comment( const std::string & str )
{
    return node_constructor< comment_factory >( str );
}

node_constructor< cdata_factory > cdata( const std::string & str )
{
    return node_constructor< cdata_factory >( str );
}

struct element
{
    template< typename Factory >
    void append( const node_constructor< Factory > & cons )
    {
       // call the factory here...
       Factory::make_node( ..., cons.value );
    }
};

This would make it easier to support push_back( cdata( "foo<bar>" )), 
etc. without having _comment, _cdata, etc. variants for each insertion 
function.

- Reece