50 lines
1.2 KiB
Markdown
50 lines
1.2 KiB
Markdown
[logical.operations.not]
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# 22 General utilities library [[utilities]](./#utilities)
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## 22.10 Function objects [[function.objects]](function.objects#logical.operations.not)
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### 22.10.10 Logical operations [[logical.operations]](logical.operations#not)
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#### 22.10.10.4 Class template logical_not [logical.operations.not]
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[ð](#lib:logical_not)
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`template<class T = void> struct logical_not {
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constexpr bool operator()(const T& x) const;
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};
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`
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[ð](#lib:operator(),logical_not)
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`constexpr bool operator()(const T& x) const;
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L12899)
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*Returns*: !x[.](#1.sentence-1)
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[ð](#lib:logical_not%3c%3e)
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`template<> struct logical_not<void> {
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template<class T> constexpr auto operator()(T&& t) const
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-> decltype(!std::forward<T>(t));
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using is_transparent = unspecified;
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};
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`
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[ð](#lib:operator(),logical_not%3c%3e)
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`template<class T> constexpr auto operator()(T&& t) const
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-> decltype(!std::forward<T>(t));
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`
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L12921)
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*Returns*: !std::forward<T>(t)[.](#2.sentence-1)
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