tmp/tmpdwiaq16s/{from.md → to.md}
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### Header `<expected>` synopsis <a id="expected.syn">[[expected.syn]]</a>
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``` cpp
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namespace std {
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// [expected.unexpected], class template unexpected
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template<class E> class unexpected;
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// [expected.bad], class template bad_expected_access
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template<class E> class bad_expected_access;
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// [expected.bad.void], specialization for void
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template<> class bad_expected_access<void>;
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// in-place construction of unexpected values
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struct unexpect_t {
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explicit unexpect_t() = default;
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};
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inline constexpr unexpect_t unexpect{};
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// [expected.expected], class template expected
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template<class T, class E> class expected;
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// [expected.void], partial specialization of expected for void types
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template<class T, class E> requires is_void_v<T> class expected<T, E>;
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}
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```
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