[optional.mod]

# 22 General utilities library [[utilities]](./#utilities)

## 22.5 Optional objects [[optional]](optional#mod)

### 22.5.3 Class template optional [[optional.optional]](optional.optional#optional.mod)

#### 22.5.3.9 Modifiers [optional.mod]

[ð](#lib:reset,optional)

`constexpr void reset() noexcept;
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L4434)

*Effects*: If *this contains a value, calls val->T​::​~T() to destroy the contained value;
otherwise no effect[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L4439)

*Postconditions*: *this does not contain a value[.](#2.sentence-1)
