Re: [Boost-users] Multi index assistance

Subject: Re: [Boost-users] Multi index assistance
From: Joaquin M Lopez Munoz (joaquin_at_[hidden])
Date: 2010-08-16 12:51:52

Etienne Philip Pretorius <icewolfhunter <at> gmail.com> writes:

> Hello List,
> 
> I have defined a multi_index container, but I am not able to populate 
> the container. Is there something that I have missed?
> 
>      struct element {
>        [...]
>      };
> 
>      typedef boost::multi_index_container<
>          element,
>          [...]
>      > matrix_t;
> 
> Then I define:
> 
>      matrix_t m;
>      element e(1,2,3);
>      m.insert <-- not valid

The correct syntax is

  m.insert(e);

The following complete program compiles succesfully,
code is identical to yours except that I used boost::uint8_t
instead of std::uint8_t, which does not exist in my platform:

  #include <boost/multi_index_container.hpp>
  #include <boost/multi_index/ordered_index.hpp>
  #include <boost/multi_index/member.hpp>
  #include <boost/cstdint.hpp>

  using namespace boost::multi_index;

  struct element{
    element(
      boost::uint8_t x,
      boost::uint8_t y,
      boost::uint8_t z
    ) : x(x),y(y),z(z) {};
    boost::uint8_t    x,y,z;
  };

  typedef multi_index_container<
    element,
    indexed_by<
      ordered_non_unique<
        member<element, boost::uint8_t, &element::x>
      >,
      ordered_non_unique<
        member<element, boost::uint8_t, &element::y>
      >,
      ordered_unique<
        member<element, boost::uint8_t, &element::z>
      >
    >
  > matrix_t;

  int main()
  {
    matrix_t m;
    element e(1,2,3);
    m.insert(e);
  }

HTH,

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo