Newbie Question Shared Memory Containers/Allocators

From: Da Xu (djsignal7_at_[hidden])
Date: 2020-02-02 06:07:55

Hi everybody, 
how are you?
I am a completely noob when it comes to Boost.  :D But not a noob when it comes to C++. Though, am a bit noobish when it comes to C++14 and beyond :D
I am trying to construct a complex data container, which has a vector of floats, on managed shared memory.
I followed the documentation, added the appropriate headers and made the following declarations:
typedef managed_windows_shared_memory::segment_manager segment_manager_t;
typedef allocator<void, segment_manager_t>Â  void_allocator;
typedef basic_string<char, std::char_traits<char>, char_allocator> shared_string;
typedef allocator<float, segment_manager_t> float_allocator;
typedef vector<float, float_allocator> float_vector;
typedef allocator<float_vector, segment_manager_t> float_vector_allocator;

class ComplexContainer {shared_string name;float_vector channelData;
public:ComplexContainer(const char * name_, const float* data_start, const float* data_end, const void_allocator& void_alloc) :Â  Â  Â name(name_), channelData(data_start, data_end, void_alloc)Â  Â {}
ComplexContainer(const void_allocator& void_alloc) :Â  Â name(void_alloc), channelData(void_alloc){}

ComplexContainer() {}

}

but I am getting these errors at compile:
 1>D:\Libraries\boost_1_72_0\boost\container\vector.hpp(310,23): error C2512: 'boost::interprocess::allocator<float,segment_manager_t>::allocator': no appropriate default constructor available1>D:\Libraries\boost_1_72_0\boost\container\vector.hpp(308): message : while compiling class template member function 'boost::container::vector_alloc_holder<boost::interprocess::allocator<float,segment_manager_t>,unsigned __int64,boost::move_detail::integral_constant<unsigned int,2>>::vector_alloc_holder(void) noexcept(false)'1>D:\Libraries\boost_1_72_0\boost\container\vector.hpp(832): message : see reference to function template instantiation 'boost::container::vector_alloc_holder<boost::interprocess::allocator<float,segment_manager_t>,unsigned __int64,boost::move_detail::integral_constant<unsigned int,2>>::vector_alloc_holder(void) noexcept(false)' being compiled1>D:\Libraries\boost_1_72_0\boost\container\vector.hpp(779): message : see reference to class template instantiation 'boost::container::vector_alloc_holder<boost::interprocess::allocator<float,segment_manager_t>,unsigned __int64,boost::move_detail::integral_constant<unsigned int,2>>' being compiled
message : see reference to class template instantiation 'boost::container::vector<float,float_allocator,void>' being compiled

That doesn't make a whole lot of sense, since it seems to be referring to the "float_allocator" typedef. But float is not an object, it has no constructor.

Any help would be greatly appreciated!
Thank you!
Da.