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trac 5816 - fix any_range requiring copyable elements.

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This commit is contained in:
Neil Groves
2014-03-02 15:35:50 +00:00
parent 3afac93b7f
commit 79d2a66831
3 changed files with 123 additions and 15 deletions
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29
include/boost/range/detail/any_iterator_interface.hpp
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@ -27,25 +27,40 @@ namespace boost
{
typedef typename mpl::if_<
typename is_reference<T>::type,
typename add_reference<
typename add_const<
typename remove_reference<T>::type
>::type
>::type,
typename add_const<
typename remove_reference<T>::type
>::type&,
T
>::type type;
};
template<class T>
struct mutable_reference_type_generator
{
typedef typename mpl::if_<
typename mpl::and_<
typename is_const<T>::type,
typename mpl::not_<typename is_reference<T>::type>::type
>::type,
T,
typename add_reference<T>::type
>::type type;
};
template<
class Reference
, class Buffer
>
struct any_incrementable_iterator_interface
{
typedef Reference reference;
typedef typename mutable_reference_type_generator<
Reference
>::type reference;
typedef typename const_reference_type_generator<
Reference
>::type const_reference;
typedef typename remove_const<
typename remove_reference<Reference>::type
>::type reference_as_value_type;
@ -87,7 +102,7 @@ namespace boost
virtual any_single_pass_iterator_interface<reference_as_value_type, Buffer>*
clone_reference_as_value(buffer_type& buffer) const = 0;
virtual Reference dereference() const = 0;
virtual reference dereference() const = 0;
virtual bool equal(const any_single_pass_iterator_interface& other) const = 0;
};