__as_any_object.hpp

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#pragma once
#if !defined(__XTD_CORE_INTERNAL__)
#error "Do not include this file: Internal use only"
#endif
 
namespace xtd {
  template<typename type_t, typename bool_t>
  struct __enum_any_object__ {};
  
  template<typename type_t>
  struct __enum_any_object__<type_t, std::true_type> {
    type_t operator()(const any_object& o) const {return as<enum_object<type_t>>(o.value());}
  };
  
  template<typename type_t>
  struct __enum_any_object__<type_t, std::false_type> {
    type_t operator()(const any_object& o) const {throw invalid_cast_exception {};}
  };
  
  template<typename type_t, typename bool_t>
  struct __polymorphic_any_object__ {};
  
  template<typename type_t>
  struct __polymorphic_any_object__<type_t, std::true_type> {
    type_t operator()(const any_object& o) const {return as<type_t>(o.value());}
  };
  
  template<typename type_t>
  struct __polymorphic_any_object__<type_t, std::false_type> {
    type_t operator()(const any_object& o) const {return __enum_any_object__<type_t, typename std::is_enum<type_t>::type> {}(o);}
  };
  
  template<typename type_t>
  type_t as(any_object& o) {
    if (is<box<type_t>>(o.value())) return as<box<type_t>>(o.value()).value();
    return __polymorphic_any_object__<type_t, typename std::is_polymorphic<type_t>::type> {}(o);
  }
  
  template<typename type_t>
  type_t as(const any_object& o) {
    if (is<box<type_t>>(o.value())) return as<box<type_t>>(o.value()).value();
    return __polymorphic_any_object__<type_t, typename std::is_polymorphic<type_t>::type> {}(o);
  }
}