Boost C++ Libraries

namespace boost {
  namespace icl {
    struct partial_absorber;
    struct partial_enricher;
    struct total_absorber;
    struct total_enricher;

    template<typename DomainT, typename CodomainT, 
             typename Traits = icl::partial_absorber, 
             ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT), 
             ICL_COMBINE Combine = ICL_COMBINE_INSTANCE(icl::inplace_plus, CodomainT), 
             ICL_SECTION Section = ICL_SECTION_INSTANCE(icl::inter_section, CodomainT), 
             ICL_ALLOC Alloc = std::allocator> 
      class map;

    template<typename DomainT, typename CodomainT, typename Traits, 
             ICL_COMPARE Compare, ICL_COMBINE Combine, ICL_SECTION Section, 
             ICL_ALLOC Alloc> 
      struct is_map<icl::map< DomainT, CodomainT, Traits, Compare, Combine, Section, Alloc >>;
    template<typename DomainT, typename CodomainT, typename Traits, 
             ICL_COMPARE Compare, ICL_COMBINE Combine, ICL_SECTION Section, 
             ICL_ALLOC Alloc> 
      struct has_inverse<icl::map< DomainT, CodomainT, Traits, Compare, Combine, Section, Alloc >>;
    template<typename DomainT, typename CodomainT, typename Traits, 
             ICL_COMPARE Compare, ICL_COMBINE Combine, ICL_SECTION Section, 
             ICL_ALLOC Alloc> 
      struct absorbs_identities<icl::map< DomainT, CodomainT, Traits, Compare, Combine, Section, Alloc >>;
    template<typename DomainT, typename CodomainT, typename Traits, 
             ICL_COMPARE Compare, ICL_COMBINE Combine, ICL_SECTION Section, 
             ICL_ALLOC Alloc> 
      struct is_total<icl::map< DomainT, CodomainT, Traits, Compare, Combine, Section, Alloc >>;
    template<typename DomainT, typename CodomainT, typename Traits, 
             ICL_COMPARE Compare, ICL_COMBINE Combine, ICL_SECTION Section, 
             ICL_ALLOC Alloc> 
      struct type_to_string<icl::map< DomainT, CodomainT, Traits, Compare, Combine, Section, Alloc >>;
  }
}