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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmRange_h
#define cmRange_h
#include "cmConfigure.h" // IWYU pragma: keep
#include "cm_kwiml.h"
#include <algorithm>
#include <iterator>
template <typename const_iterator_>
struct cmRange
{
typedef const_iterator_ const_iterator;
typedef typename std::iterator_traits<const_iterator>::value_type value_type;
typedef typename std::iterator_traits<const_iterator>::difference_type
difference_type;
cmRange(const_iterator begin_, const_iterator end_)
: Begin(begin_)
, End(end_)
{
}
const_iterator begin() const { return Begin; }
const_iterator end() const { return End; }
bool empty() const { return std::distance(Begin, End) == 0; }
difference_type size() const { return std::distance(Begin, End); }
cmRange& advance(KWIML_INT_intptr_t amount) &
{
std::advance(this->Begin, amount);
return *this;
}
cmRange advance(KWIML_INT_intptr_t amount) &&
{
std::advance(this->Begin, amount);
return std::move(*this);
}
cmRange& retreat(KWIML_INT_intptr_t amount) &
{
std::advance(End, -amount);
return *this;
}
cmRange retreat(KWIML_INT_intptr_t amount) &&
{
std::advance(End, -amount);
return std::move(*this);
}
private:
const_iterator Begin;
const_iterator End;
};
template <typename Iter1, typename Iter2>
cmRange<Iter1> cmMakeRange(Iter1 begin, Iter2 end)
{
return cmRange<Iter1>(begin, end);
}
template <typename Range>
cmRange<typename Range::const_iterator> cmMakeRange(Range const& range)
{
return cmRange<typename Range::const_iterator>(range.begin(), range.end());
}
template <typename Range>
cmRange<typename Range::const_reverse_iterator> cmReverseRange(
Range const& range)
{
return cmRange<typename Range::const_reverse_iterator>(range.rbegin(),
range.rend());
}
#endif
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