qr.hpp

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// TODO : Documentation for this entire fil

#ifndef LIN_FACTORIZATIONS_QR_HPP_
#define LIN_FACTORIZATIONS_QR_HPP_

#include "../core.hpp"
#include "../generators/constants.hpp"
#include "../references.hpp"

#include <type_traits>

namespace lin {
namespace internal {

template <class C, class D, class E>
struct can_qr : conjunction<
    have_same_elements<C, D, E>,
    is_tall<C>,
    is_square<E>,
    can_multiply<D, E>,
    have_same_dimensions<C, D>
  > { };

}  // namespace internal

template <class C, class D, class E, std::enable_if_t<internal::can_qr<C, D, E>::value, size_t> = 0>
constexpr int qr(internal::Stream<C> const &M, internal::Mapping<D> &Q, internal::Mapping<E> &R);

template <class C, class D, class E, std::enable_if_t<internal::can_qr<C, D, E>::value, size_t> = 0>
constexpr int qr(internal::Stream<C> const &M, internal::Base<D> &Q, internal::Base<E> &R);

}  // namespace lin

#include "inl/qr.inl"

#endif