46 lines
989 B
C++
46 lines
989 B
C++
|
#ifndef FOR_EACH_PAIR_HPP
|
||
|
|
#define FOR_EACH_PAIR_HPP
|
||
|
|
|
||
|
|
#include <numeric>
|
||
|
|
#include <iterator>
|
||
|
|
|
||
|
|
namespace osrm
|
||
|
|
{
|
||
|
|
namespace util
|
||
|
|
{
|
||
|
|
|
||
|
|
// TODO: check why this is not an option here:
|
||
|
|
// std::adjacent_find(begin, end, [=](const auto& l, const auto& r){ return function(), false; });
|
||
|
|
template <typename ForwardIterator, typename Function>
|
||
|
|
Function for_each_pair(ForwardIterator begin, ForwardIterator end, Function function)
|
||
|
|
{
|
||
|
|
if (begin == end)
|
||
|
|
{
|
||
|
|
return function;
|
||
|
|
}
|
||
|
|
|
||
|
|
auto next = begin;
|
||
|
|
next = std::next(next);
|
||
|
|
|
||
|
|
while (next != end)
|
||
|
|
{
|
||
|
|
function(*begin, *next);
|
||
|
|
begin = std::next(begin);
|
||
|
|
next = std::next(next);
|
||
|
|
}
|
||
|
|
return function;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class ContainerT, typename Function>
|
||
|
|
Function for_each_pair(ContainerT &container, Function function)
|
||
|
|
{
|
||
|
|
using std::begin;
|
||
|
|
using std::end;
|
||
|
|
return for_each_pair(begin(container), end(container), function);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace util
|
||
|
|
} // namespace osrm
|
||
|
|
|
||
|
|
#endif /* FOR_EACH_PAIR_HPP */
|