tmp/tmpzmanxiq2/{from.md → to.md}
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#### Equality operators <a id="expected.object.eq">[[expected.object.eq]]</a>
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``` cpp
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template<class T2, class E2> requires (!is_void_v<T2>)
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friend constexpr bool operator==(const expected& x, const expected<T2, E2>& y);
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```
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*Mandates:* The expressions `*x == *y` and `x.error() == y.error()` are
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well-formed and their results are convertible to `bool`.
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*Returns:* If `x.has_value()` does not equal `y.has_value()`, `false`;
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otherwise if `x.has_value()` is `true`, `*x == *y`; otherwise
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`x.error() == y.error()`.
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``` cpp
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template<class T2> friend constexpr bool operator==(const expected& x, const T2& v);
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```
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*Mandates:* The expression `*x == v` is well-formed and its result is
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convertible to `bool`.
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[*Note 1*: `T` need not be *Cpp17EqualityComparable*. — *end note*]
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*Returns:* `x.has_value() && static_cast<bool>(*x == v)`.
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``` cpp
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template<class E2> friend constexpr bool operator==(const expected& x, const unexpected<E2>& e);
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```
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*Mandates:* The expression `x.error() == e.error()` is well-formed and
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its result is convertible to `bool`.
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*Returns:*
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`!x.has_value() && static_cast<bool>(x.error() == e.error())`.
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