tmp/tmpzo06a_vf/{from.md → to.md}
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| 1 |
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#### Class template `conjugated_accessor` <a id="linalg.conj.conjugatedaccessor">[[linalg.conj.conjugatedaccessor]]</a>
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The class template `conjugated_accessor` is an `mdspan` accessor policy
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which upon access produces conjugate elements. It is part of the
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implementation of `conjugated` [[linalg.conj.conjugated]].
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``` cpp
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namespace std::linalg {
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template<class NestedAccessor>
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class conjugated_accessor {
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public:
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using element_type =
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const decltype(conj-if-needed(declval<NestedAccessor::element_type>()));
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using reference = remove_const_t<element_type>;
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using data_handle_type = NestedAccessor::data_handle_type;
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using offset_policy = conjugated_accessor<NestedAccessor::offset_policy>;
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constexpr conjugated_accessor() = default;
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constexpr conjugated_accessor(const NestedAccessor& acc);
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template<class OtherNestedAccessor>
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explicit(!is_convertible_v<OtherNestedAccessor, NestedAccessor>)
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constexpr conjugated_accessor(const conjugated_accessor<OtherNestedAccessor>& other);
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constexpr reference access(data_handle_type p, size_t i) const;
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constexpr typename offset_policy::data_handle_type
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offset(data_handle_type p, size_t i) const;
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constexpr const NestedAccessor& nested_accessor() const noexcept { return nested-accessor_; }
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private:
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NestedAccessor nested-accessor_{}; // exposition only
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};
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}
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```
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*Mandates:*
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- `element_type` is valid and denotes a type,
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- `is_copy_constructible_v<reference>` is `true`,
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- `is_reference_v<element_type>` is `false`, and
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- `NestedAccessor` meets the accessor policy requirements
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[[mdspan.accessor.reqmts]].
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``` cpp
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constexpr conjugated_accessor(const NestedAccessor& acc);
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```
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*Effects:* Direct-non-list-initializes *nested-accessor\_* with `acc`.
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``` cpp
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template<class OtherNestedAccessor>
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explicit(!is_convertible_v<OtherNestedAccessor, NestedAccessor>)
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constexpr conjugated_accessor(const conjugated_accessor<OtherNestedAccessor>& other);
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```
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*Constraints:*
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`is_constructible_v<NestedAccessor, const OtherNestedAccessor&>` is
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`true`.
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*Effects:* Direct-non-list-initializes *nested-accessor\_* with
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`other.nested_accessor()`.
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``` cpp
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constexpr reference access(data_handle_type p, size_t i) const;
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```
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*Returns:*
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*`conj-if-needed`*`(NestedAccessor::element_type(`*`nested-accessor_`*`.access(p, i)))`
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``` cpp
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constexpr typename offset_policy::data_handle_type offset(data_handle_type p, size_t i) const;
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```
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*Returns:* *`nested-accessor_`*`.offset(p, i)`
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