28 lines
766 B
Markdown
28 lines
766 B
Markdown
[optional.mod]
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# 22 General utilities library [[utilities]](./#utilities)
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## 22.5 Optional objects [[optional]](optional#mod)
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### 22.5.3 Class template optional [[optional.optional]](optional.optional#optional.mod)
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#### 22.5.3.9 Modifiers [optional.mod]
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[ð](#lib:reset,optional)
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`constexpr void reset() 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#L4434)
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*Effects*: If *this contains a value, calls val->T::~T() to destroy the contained value;
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otherwise no effect[.](#1.sentence-1)
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L4439)
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*Postconditions*: *this does not contain a value[.](#2.sentence-1)
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