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#pragma once
#include "Algorithm.hh"
namespace cadabra {
/// \ingroup algorithms
///
/// Collect symbolically equal terms in a sum.
class collect_terms : public Algorithm {
public:
collect_terms(const Kernel&, Ex&);
virtual bool can_apply(iterator);
virtual result_t apply(iterator&);
void fill_hash_map(iterator);
void fill_hash_map(sibling_iterator, sibling_iterator);
private:
result_t collect_from_hash_map();
void remove_zeroed_terms(sibling_iterator, sibling_iterator);
typedef std::multimap<hashval_t, sibling_iterator> term_hash_t;
typedef term_hash_t::iterator term_hash_iterator_t;
term_hash_t term_hash;
};
}
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