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Codechange: Add Slide container helper function.

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This function will move the selected range between first and last to position, rotating elements as necessary.

Returns iterators to the new positions.
This commit is contained in:
Peter Nelson 2024-11-27 23:05:58 +00:00 committed by Peter Nelson
parent bc2513975f
commit 01d1ea6264
1 changed files with 15 additions and 0 deletions
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15
src/core/container_func.hpp
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@ -46,4 +46,19 @@ int find_index(Container const &container, typename Container::const_reference i
return -1; return -1;
} }
/**
* Move elements between first and last to a new position, rotating elements in between as necessary.
* @param first Iterator to first element to move.
* @param last Iterator to (end-of) last element to move.
* @param position Iterator to where range should be moved to.
* @returns Iterators to first and last after being moved.
*/
template <typename TIter>
auto Slide(TIter first, TIter last, TIter position) -> std::pair<TIter, TIter>
{
if (last < position) return { std::rotate(first, last, position), position };
if (position < first) return { position, std::rotate(position, first, last) };
return { first, last };
}
#endif /* CONTAINER_FUNC_HPP */ #endif /* CONTAINER_FUNC_HPP */