28 Numerics library [numerics]

28.9 Basic linear algebra algorithms [linalg]

28.9.9 Conjugated in-place transformation [linalg.conj]

28.9.9.3 Function template conjugated [linalg.conj.conjugated]

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template<class ElementType, class Extents, class Layout, class Accessor> constexpr auto conjugated(mdspan<ElementType, Extents, Layout, Accessor> a);
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Let A be remove_cvref_t<decltype(a.accessor().nested_accessor())> if Accessor is a specialization of conjugated_accessor, and otherwise conjugated_accessor<Accessor>.
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Returns:
  • (2.1)
    If Accessor is a specialization of conjugated_accessor, mdspan<typename A::element_type, Extents, Layout, A>(a.data_handle(), a.mapping(), a.accessor().nested_accessor())
  • (2.2)
    otherwise, mdspan<typename A::element_type, Extents, Layout, A>(a.data_handle(), a.mapping(), conjugated_accessor(a.accessor()))
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[Example 1: void test_conjugated_complex(mdspan<complex<double>, extents<int, 10>> a) { auto a_conj = conjugated(a); for(int i = 0; i < a.extent(0); ++i) { assert(a_conj[i] == conj(a[i]); } auto a_conj_conj = conjugated(a_conj); for(int i = 0; i < a.extent(0); ++i) { assert(a_conj_conj[i] == a[i]); } } void test_conjugated_real(mdspan<double, extents<int, 10>> a) { auto a_conj = conjugated(a); for(int i = 0; i < a.extent(0); ++i) { assert(a_conj[i] == a[i]); } auto a_conj_conj = conjugated(a_conj); for(int i = 0; i < a.extent(0); ++i) { assert(a_conj_conj[i] == a[i]); } } — end example]