Assign a new value to this optional.

Synopsis

Declared in <bslstl_optional.h>

constexpr
optional<t_TYPE>&
operator=(bsl::nullopt_t nullopt) noexcept;

Description

Reset this object to be disengaged and return a reference providing modifiable access to this object. This assignment operator can be called in constant expressions only when t_TYPE is not allocator‐aware.

Return Value

reference providing modifiable access to this object

Parameters

Name

Description

nullopt

disengaged‐optional tag; value is unused

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