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## Function template empty

boost::histogram::algorithm::empty — Check to see if all histogram cells are empty.

## Synopsis

    // In header: <boost/histogram/algorithm/empty.hpp>

    template<typename A, typename S>
      auto empty(const histogram< A, S > & h, coverage cov);

## Description

Use coverage to include or exclude the underflow/overflow bins.

This algorithm has O(N) complexity, where N is the number of cells.

Returns true if all cells are empty, and false otherwise.