boost::algorithm::any_of_equal
// In header: <boost/algorithm/cxx11/any_of.hpp> template<typename InputIterator, typename V> bool any_of_equal(InputIterator first, InputIterator last, const V & val);
returns false on an empty range
Parameters:
first
The start of the input sequence
last
One past the end of the input sequence
val
A value to compare against
Returns:
true if any of the elements in [first, last) are equal to 'val'