#ifndef LYX_ALGO_H
#define LYX_ALGO_H
-#include <utility>
-#include <iterator>
-#include <algorithm>
-
-
namespace lyx {
}
-struct firster {
- template <class P1, class P2>
- P1 operator()(std::pair<P1, P2> const & p) {
- return p.first;
- }
-};
-
-
-/**
- * copy elements in the given range to the output iterator
- * if the predicate evaluates as true
- */
-template <class InputIter, class OutputIter, class Func>
-OutputIter copy_if(InputIter first, InputIter last,
- OutputIter result, Func func)
-{
- for (; first != last; ++first) {
- if (func(*first)) {
- *result++ = *first;
- }
- }
- return result;
-}
-
-
-/// Remove all duplicate entries in c.
-template<class C>
-void eliminate_duplicates(C & c)
-{
- // It is a requirement that the container is sorted for
- // std::unique to work properly.
- std::sort(c.begin(), c.end());
- c.erase(std::unique(c.begin(), c.end()), c.end());
-}
-
-
-#if __cplusplus >= 201103L
-using std::next;
-#else
-/// Replacement of std::next for older compilers
-template <typename It, typename Diff>
-inline It next(It i, Diff n = 1)
-{
- std::advance(i, n);
- return i;
-}
-#endif
-
-
-#if __cplusplus >= 201103L
-using std::prev;
-#else
-/// Replacement of std::prev for older compilers
-template <typename It, typename Diff>
-inline It prev(It i, Diff n = 1)
-{
- std::advance(i, -n);
- return i;
-}
-#endif
-
} // namespace lyx
#endif // LYX_ALGO_H