I am trying to make some wrapper class for multi_index_container.
Basically I want to export only those operations:
- Insert Element
- Remove Element(for a given element)
- Get Element by key
The following code is defined:
typedef boost::multi_index::multi_index_container<
SR, boost::multi_index::indexed_by<
boost::multi_index::ordered_unique<boost::multi_index::tag<SR::ByIdentity>,boost::multi_index::identity<SR> >
, boost::multi_index::ordered_unique< boost::multi_index::tag<ByName>,boost::multi_index::const_mem_fun<SR,const std::string&
, &SR::GetName> >
, boost::multi_index::ordered_non_unique<boost::multi_index::tag<ByID>,boost::multi_index::const_mem_fun<SR, ID
, &SR::GetID> >
>
> SRs;
where:
SR::ByIdentity internal empty struct
ByName and ByID are pre defined empty structs.
those are functions defined in SR
ID SetID(ID ID);
ID GetID() const;
void SetName(const std::string& name);
const std::string& GetName() const;
and this is the code for Insert, Remove and Get
bool Insert(ElementType val)
{
return m_container.insert(val).second;
}
void Remove(ElementType val)
{
iterator It = m_container.get<ByIdenetity>().find(val);
if (It != m_container.end())
{
m_container.erase(It);
}
}
template<typename Iterator> const_iterator Get(typename Iterator::mtype val) const
{
typename Iterator::iterator::const_iterator It = m_container.get<typename Iterator::index>().find(val);
return It;
}
where typename Iterator is defined as one of
struct IdentityIterator
{
typedef ByIdentity index;
typedef SR mtype;
typedef SRs::index<ByIdentity>::type iterator;
} ;
struct NameIterator
{
typedef ByName index;
typedef const std::string& mtype;
typedef SRs::index<ByName>::type iterator;
} ;
struct NameIterator
{
typedef ByID index;
typedef ID mtype;
typedef SRs::index<ByID>::type iterator;
} ;
I get The following compile error:
In member function ?€˜typename ContainerType::const_iterator ns1::ContainerWrapper<ContainerType>::get(typename Iterator::mtype) const [with Iterator = ns2::NameIter, ContainerType = boost::multi_index::multi_index_container<ns2::SR, boost::multi_index::indexed_by<boost::multi_index::ordered_non_unique<boost::multi_index::tag<ns2::ByIdentity, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, boost::multi_index::identity<ns2::SR>, mpl_::na>, boost::multi_index::ordered_unique<boost::multi_index::tag<ns2::ByName, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, boost::multi_index::const_mem_fun<ns2::SR, const std::string&, &ns2::SR::GetName>, mpl_::na>, boost::multi_index::ordered_non_unique<boost::multi_index::tag<ns2::ByID, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, boost::multi_index::const_mem_fun<ns2::SR, int, &ns2::SR::GetRoleID>, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<ns2::SR> >]?€™:
ns3/testFile.cpp:509: instantiated from here
../ns1/ContainerWrapper.h:114: error: conversion from ?€˜boost::multi_index::detail::bidir_node_iterator<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<ns2::SR, std::allocator<ns2::SR> > > > >?€™ to non-scalar type ?€˜boost::multi_index::detail::bidir_node_iterator<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::ordered_index_node<boost::multi_index::detail::index_node_base<ns2::SR, std::allocator<ns2::SR> > > > > >?€™ requested
This does not happen when I remove the boost::multi_index::ordered_unique<boost::multi_index::tag<SR::ByIdentity>,boost::multi_index::identity<SR> >
any Idea?