Function template find

Function template find_head

boost::algorithm::find_head — Find head algorithm.

Synopsis

template<typename RangeT> 
  iterator_range< typename range_result_iterator< RangeT >::type > 
  find_head(RangeT & Input, unsigned int N);

Description

Get the head of the input. Head is a prefix of the string of the given size. If the input is shorter then required, whole input if considered to be the head.

Parameters

Input: An input string
N: Length of the head

Returns: An iterator_range delimiting the match. Returned iterator is either Range1T::iterator or Range1T::const_iterator , depending on the constness of the input parameter.
Notes: This function provides the strong exception-safety guarantee