[Boost-users] Compiler warns about 'reference to temporary' with iterator on shared memory map

Subject: [Boost-users] Compiler warns about 'reference to temporary' with iterator on shared memory map
From: Rajalakshmi Iyer (raj_at_[hidden])
Date: 2012-04-16 08:51:27

Hello,

Consider:

typedef std::pair<int, int> value_type;
typedef allocator<value_type, managed_shared_memory::segment_manager>
ValueAllocator;
typedef boost::interprocess::map<int, int, std::less<int>, ValueAllocator>
A_map;

class A
{
public:
   A() { /* Construct shared memory map */ }
   ~A()

   bool contains(int i);
private:
   A_map* m_objA;
};

inline bool
A::contains(int i)
{
    A_map::iterator itr = m_objA->find(i);
    return (itr != m_objA->end());
}

Here, at the line
   A_map::iterator itr = m_objA->find(i);

I see this warning:

.../boost_1_49_0/include/boost/container/detail/tree.hpp:391:31: warning:
returning reference to temporary [enabled by default]

I dont see a reason for this. Can someone please point out if I am doing
something wrong here?

Thanks in advance,
Regards,
Raj

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