A Question on template

[lucky6969b]

What my purpose here is to use a template
to append an item of type T to a node of a ptree (boost)

template<typename T>
ptree& stick(ptree& tree, char *location, T const & t)
{
 
    return tree.add(location, t);
  
}

Here I can't compile

struct hdr {
	WORD weights_per_vertex;
	WORD weights_per_face;
	WORD num_bones;
};
hdr h;
h.weights_per_vertex = numMax;
h.weights_per_face = 0;
h.num_bones = numAffect;
 
ptree& skinHeader = stick(stored, "", h);

Doesn't the type of T includes the type struct hdr?

Thanks
Jack

[2kaud]

What is the compile error? Is it to do with '<<'?

[Paul McKenzie]

Here I can't compile

Why didn't you post the compiler error?

struct hdr {
	WORD weights_per_vertex;
	WORD weights_per_face;
	WORD num_bones;
};

I have never used "ptree", but without the compiler error posted, we have no idea if the error is syntax related, whether ptree.add() requires the third parameter to have certain characteristics (i.e. whether the type is streamable), who knows...

Regards,

Paul McKenzie

[razzle]

Doesn't the type of T includes the type struct hdr?

I don't know what you mean by that but you can always specify the generic type like,

ptree& skinHeader = stick<hdr>(stored, "", h);