I would like to use boost's multi-index container with a class hierarchy. Is this possible?
If I try:
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/ordered_index.hpp>
#include <boost/multi_index/identity.hpp>
#include <boost/multi_index/member.hpp>
using namespace ::boost;
using namespace ::boost::multi_index;
class A{
public:
int m;
A(int p = 0){m = p;};
};
class B: public A{
public:
int n;
B(int p = 0, int q = 0): A(p){ n = q;};
};
typedef multi_index_container<
B,
indexed_by<
ordered_unique<identity<B> >,
ordered_non_unique<member<B, int, &B::m> >
>
> mindex;
int main(void){
return 0;
}
I get the following errors:
multiindextest.cpp:25: error: could not convert template argument ‘&A::m’ to ‘int B::*’
multiindextest.cpp:25: error: template argument 1 is invalid
multiindextest.cpp:26: error: template argument 2 is invalid
multiindextest.cpp开发者_如何学运维:27: error: template argument 2 is invalid
multiindextest.cpp:27: error: invalid type in declaration before ‘;’ token
If I change line 25 to:
ordered_non_unique<member<B, int, &B::n> >
It compiles fine. Any help would be much appreciated. Thanks.
I'm not quite sure, if this is what you are looking for, but you can change line 25 to:
ordered_non_unique<member<A, int, &A::m> >
This is compiling on gcc 4.4.
Regards Lars.
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