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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// -*-mode:c++;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8-*-
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// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
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#ifndef CTL_ITERATOR_TRAITS_H_
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#define CTL_ITERATOR_TRAITS_H_
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#include "iterator.h"
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#include "utility.h"
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#include "void_t.h"
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namespace ctl {
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template<typename Iterator, typename = void>
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struct iterator_traits
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{};
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template<typename T>
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struct iterator_traits<T*>
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{
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using difference_type = ptrdiff_t;
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using value_type = T;
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using pointer = T*;
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using reference = T&;
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using iterator_category = ctl::random_access_iterator_tag;
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};
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template<typename Iterator>
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struct iterator_traits<Iterator,
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ctl::void_t<typename Iterator::iterator_category,
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typename Iterator::value_type,
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typename Iterator::difference_type,
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typename Iterator::pointer,
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typename Iterator::reference>>
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{
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using iterator_category = typename Iterator::iterator_category;
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using value_type = typename Iterator::value_type;
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using difference_type = typename Iterator::difference_type;
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using pointer = typename Iterator::pointer;
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using reference = typename Iterator::reference;
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};
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} // namespace ctl
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#endif // CTL_ITERATOR_TRAITS_H_
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