extl/iterator/iterator_category.h

   1 /* ///////////////////////////////////////////////////////////////////////
   2  * File:                iterator_category.h
   3  *
   4  * Created:             08.04.07
   5  * Updated:             08.04.15
   6  *
   7  * Brief: Iterator categories
   8  *
   9  * [<Home>]
  10  * Copyright (c) 2008-2020, Waruqi All rights reserved.
  11  * //////////////////////////////////////////////////////////////////// */
  12
  13 #ifndef EXTL_ITERATOR_ITERATOR_CATEGORY_H
  14 #define EXTL_ITERATOR_ITERATOR_CATEGORY_H
  15
  16 /*!\file iterator_category.h
  17  * \brief iterator_category class
  18  */
  19 #ifndef __cplusplus
  20 #       error iterator_category.h need be supported by c++.
  21 #endif
  22
  23 /* ///////////////////////////////////////////////////////////////////////
  24  * Includes
  25  */
  26 #include "prefix.h"
  27
  28 /* ///////////////////////////////////////////////////////////////////////
  29  * ::extl namespace
  30  */
  31 EXTL_BEGIN_NAMESPACE
  32
  33 /* ///////////////////////////////////////////////////////////////////////
  34  * Five kind of iterator categories
  35  */
  36 #if defined(EXTL_NO_STL)
  37 /// input_iterator_tag
  38 struct std_input_iterator_tag {};
  39 /// output_iterator_tag
  40 struct std_output_iterator_tag {};
  41 /// forward_iterator_tag
  42 struct std_forward_iterator_tag
  43         : public std_input_iterator_tag {};
  44 /// bidirectional_iterator_tag
  45 struct std_bidirectional_iterator_tag
  46         : public std_forward_iterator_tag {};
  47 /// random_access_iterator_tag
  48 struct std_random_access_iterator_tag
  49         : public std_bidirectional_iterator_tag {};
  50 #else
  51 /// input_iterator_tag
  52 typedef EXTL_NS_STD(input_iterator_tag)                 std_input_iterator_tag;
  53 /// output_iterator_tag
  54 typedef EXTL_NS_STD(output_iterator_tag)                std_output_iterator_tag;
  55 /// forward_iterator_tag
  56 typedef EXTL_NS_STD(forward_iterator_tag)               std_forward_iterator_tag;
  57 /// bidirectional_iterator_tag
  58 typedef EXTL_NS_STD(bidirectional_iterator_tag) std_bidirectional_iterator_tag;
  59 /// random_access_iterator_tag
  60 typedef EXTL_NS_STD(random_access_iterator_tag) std_random_access_iterator_tag;
  61 #endif
  62
  63 /* ///////////////////////////////////////////////////////////////////////
  64  * ::extl namespace
  65  */
  66 EXTL_END_NAMESPACE
  67
  68 /* //////////////////////////////////////////////////////////////////// */
  69 #endif /* EXTL_ITERATOR_ITERATOR_CATEGORY_H */
  70 /* //////////////////////////////////////////////////////////////////// */