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boost::algorithm::head_finder — "Head" finder
// In header: <boost/algorithm/string/finder.hpp> unspecified head_finder(int N);
Construct the head_finder. The finder returns a head of a given input. The head is a prefix of a string up to n elements in size. If an input has less then n elements, whole input is considered a head. The result is given as an iterator_range delimiting the match.
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| Returns: | An instance of the  |