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34 lines
748 B
C++
34 lines
748 B
C++
#ifndef STDXfg_ALGORITHMX_H
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#define STDXfg_ALGORITHMX_H
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// Some std:: namespace enhancements
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#include <algorithm>
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namespace stdx_fg {
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template <class ForwardIterator, class T, class Compare>
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ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last, const T& val, Compare comp)
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{
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ForwardIterator it;
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typename std::iterator_traits<ForwardIterator>::difference_type count, step;
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count = std::distance(first,last);
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while(count > 0)
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{
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it = first;
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step = count/2;
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std::advance (it,step);
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if (comp(*it, val))
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{
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first= ++it;
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count -= step+1;
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}
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else
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count = step;
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}
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return first;
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}
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} // end namespace stdx_fg
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#endif
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