30 lines
789 B
Markdown
30 lines
789 B
Markdown
[optional.nullops]
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# 22 General utilities library [[utilities]](./#utilities)
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## 22.5 Optional objects [[optional]](optional#nullops)
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### 22.5.8 Comparison with nullopt [optional.nullops]
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[ð](#lib:operator==,optional)
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`template<class T> constexpr bool operator==(const optional<T>& x, nullopt_t) noexcept;
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L5208)
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*Returns*: !x[.](#1.sentence-1)
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[ð](#lib:operator%3c=%3e,optional)
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`template<class T> constexpr strong_ordering operator<=>(const optional<T>& x, nullopt_t) noexcept;
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`
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L5219)
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*Returns*: x.has_value() <=> false[.](#2.sentence-1)
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