basebmp/inc/iteratortraits.hxx

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  19
  20 #ifndef INCLUDED_BASEBMP_INC_ITERATORTRAITS_HXX
  21 #define INCLUDED_BASEBMP_INC_ITERATORTRAITS_HXX
  22
  23 #include <accessor.hxx>
  24 #include <nonstandarditerator.hxx>
  25
  26 namespace basebmp
  27 {
  28
  29 template< class Iterator > struct IteratorTraits
  30 {
  31     /// VigraTrueType, if iterator does not provide *operator()/operator[] methods
  32     typedef typename vigra::IsDerivedFrom<Iterator,NonStandardIterator>::result
  33             isNonStandardIterator;
  34
  35     /// Retrieve default accessor for this iterator (and given value type)
  36     template< typename ValueType > struct defaultAccessor : public
  37         // select according to non-standardness of iterator type
  38         vigra::If< isNonStandardIterator,
  39             NonStandardAccessor< ValueType >,
  40             StandardAccessor< ValueType > >
  41     {};
  42
  43 };
  44
  45 } // namespace basebmp
  46
  47 #endif /* INCLUDED_BASEBMP_INC_ITERATORTRAITS_HXX */
  48
  49 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */