epoc32/include/stdapis/boost/pending/property.hpp
branchSymbian3
changeset 4 837f303aceeb
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/epoc32/include/stdapis/boost/pending/property.hpp	Wed Mar 31 12:33:34 2010 +0100
     1.3 @@ -0,0 +1,132 @@
     1.4 +//  (C) Copyright Jeremy Siek 2004 
     1.5 +//  Distributed under the Boost Software License, Version 1.0. (See
     1.6 +//  accompanying file LICENSE_1_0.txt or copy at
     1.7 +//  http://www.boost.org/LICENSE_1_0.txt)
     1.8 +
     1.9 +#ifndef BOOST_PROPERTY_HPP
    1.10 +#define BOOST_PROPERTY_HPP
    1.11 +
    1.12 +#include <boost/pending/ct_if.hpp>
    1.13 +
    1.14 +namespace boost {
    1.15 +
    1.16 +  struct no_property { 
    1.17 +    typedef no_property tag_type;
    1.18 +    typedef no_property next_type;
    1.19 +    typedef no_property value_type;
    1.20 +    enum { num = 0 };
    1.21 +    typedef void kind;
    1.22 +  };
    1.23 +
    1.24 +  template <class Tag, class T, class Base = no_property>
    1.25 +  struct property : public Base {
    1.26 +    typedef Base next_type;
    1.27 +    typedef Tag tag_type;
    1.28 +    typedef T value_type;
    1.29 +#if BOOST_WORKAROUND (__GNUC__, < 3)
    1.30 +    property() { }
    1.31 +#else
    1.32 +    property() : m_value() { }
    1.33 +#endif
    1.34 +    property(const T& v) : m_value(v) { }
    1.35 +    property(const T& v, const Base& b) : Base(b), m_value(v) { }
    1.36 +    // copy constructor and assignment operator will be generated by compiler
    1.37 +
    1.38 +    T m_value;
    1.39 +  };
    1.40 +
    1.41 +  // The BGL properties specialize property_kind and
    1.42 +  // property_num, and use enum's for the Property type (see
    1.43 +  // graph/properties.hpp), but the user may want to use a class
    1.44 +  // instead with a nested kind type and num.  Also, we may want to
    1.45 +  // switch BGL back to using class types for properties at some point.
    1.46 +
    1.47 +  template <class PropertyTag>
    1.48 +  struct property_kind {
    1.49 +    typedef typename PropertyTag::kind type;
    1.50 +  };
    1.51 +
    1.52 +  template <class P>
    1.53 +  struct has_property { 
    1.54 +    BOOST_STATIC_CONSTANT(bool, value = true);
    1.55 +    typedef true_type type;
    1.56 +  };
    1.57 +  template <>
    1.58 +  struct has_property<no_property> { 
    1.59 +    BOOST_STATIC_CONSTANT(bool, value = false); 
    1.60 +    typedef false_type type; 
    1.61 +  };
    1.62 +
    1.63 +} // namespace boost
    1.64 +
    1.65 +#include <boost/pending/detail/property.hpp>
    1.66 +
    1.67 +namespace boost {
    1.68 +
    1.69 +  template <class PropertyList, class Tag>
    1.70 +  struct property_value {
    1.71 +#if !defined BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
    1.72 +    typedef typename detail::build_property_tag_value_alist<PropertyList>::type AList;
    1.73 +    typedef typename detail::extract_value<AList,Tag>::type type;
    1.74 +#else
    1.75 +    typedef typename detail::build_property_tag_value_alist<PropertyList>::type AList;
    1.76 +    typedef typename detail::ev_selector<AList>::type Extractor;
    1.77 +    typedef typename Extractor::template bind_<AList,Tag>::type type;
    1.78 +#endif  
    1.79 +  };
    1.80 +
    1.81 +  template <class Tag1, class Tag2, class T1, class Base>
    1.82 +  inline typename property_value<property<Tag1,T1,Base>, Tag2>::type& 
    1.83 +  get_property_value(property<Tag1,T1,Base>& p, Tag2 tag2) {
    1.84 +    BOOST_STATIC_CONSTANT(bool, 
    1.85 +                          match = (detail::same_property<Tag1,Tag2>::value));
    1.86 +    typedef property<Tag1,T1,Base> Prop;
    1.87 +    typedef typename property_value<Prop, Tag2>::type T2;
    1.88 +    T2* t2 = 0;
    1.89 +    typedef detail::property_value_dispatch<match> Dispatcher;
    1.90 +    return Dispatcher::get_value(p, t2, tag2);
    1.91 +  }
    1.92 +  template <class Tag1, class Tag2, class T1, class Base>
    1.93 +  inline
    1.94 +  const typename property_value<property<Tag1,T1,Base>, Tag2>::type& 
    1.95 +  get_property_value(const property<Tag1,T1,Base>& p, Tag2 tag2) {
    1.96 +    BOOST_STATIC_CONSTANT(bool, 
    1.97 +                          match = (detail::same_property<Tag1,Tag2>::value));
    1.98 +    typedef property<Tag1,T1,Base> Prop;
    1.99 +    typedef typename property_value<Prop, Tag2>::type T2;
   1.100 +    T2* t2 = 0;
   1.101 +    typedef detail::property_value_dispatch<match> Dispatcher;
   1.102 +    return Dispatcher::const_get_value(p, t2, tag2);
   1.103 +  }
   1.104 +
   1.105 + namespace detail {
   1.106 +#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
   1.107 +   template<typename FinalTag, typename FinalType>
   1.108 +   struct retag_property_list
   1.109 +   {
   1.110 +     typedef property<FinalTag, FinalType> type;
   1.111 +     typedef FinalType retagged;
   1.112 +   };
   1.113 +
   1.114 +   template<typename FinalTag, typename Tag, typename T, typename Base>
   1.115 +   struct retag_property_list<FinalTag, property<Tag, T, Base> >
   1.116 +   {
   1.117 +   private:
   1.118 +     typedef retag_property_list<FinalTag, Base> next;
   1.119 +
   1.120 +   public:
   1.121 +     typedef property<Tag, T, typename next::type> type;
   1.122 +     typedef typename next::retagged retagged;
   1.123 +   };
   1.124 +
   1.125 +   template<typename FinalTag>
   1.126 +   struct retag_property_list<FinalTag, no_property>
   1.127 +   {
   1.128 +     typedef no_property type;
   1.129 +     typedef no_property retagged;
   1.130 +   };
   1.131 +#endif
   1.132 +  }
   1.133 +} // namesapce boost
   1.134 +
   1.135 +#endif /* BOOST_PROPERTY_HPP */