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#pragma once
#include "Algorithm.hh"
#include "IndexIterator.hh"
namespace cadabra {
class eliminate_converter : public Algorithm {
public:
eliminate_converter(const Kernel&, Ex&, Ex&, bool);
virtual bool can_apply(iterator) override;
virtual result_t apply(iterator&) override;
protected:
virtual bool is_conversion_object(iterator) const=0;
private:
Ex preferred;
index_map_t ind_dummy, ind_free;
bool redundant;
/// See if the conversion which turns index 'i1' into index
/// 'i2' can be applied on the expression, so that it gets a
/// factor in the expression closer to the 'fit' form.
/// The two indices 'i1' and 'i2' are objects on the convertor
/// object, so they need to appear with opposite parent rel
/// in the expression if they are to be applied (if the index
/// position type is 'fixed').
bool handle_one_index(index_iterator i1, index_iterator i2, iterator fit, sibling_iterator objs);
};
class eliminate_metric : public eliminate_converter {
public:
eliminate_metric(const Kernel&, Ex&, Ex&, bool);
protected:
virtual bool is_conversion_object(iterator) const override;
};
}
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