beman::optional::optional::transform

Returns an optional containing the result of applying f to the stored value, or a default value if there is no stored value.

Synopses

Returns an optional containing the result of applying f to the stored value, or a default value if there is no stored value.

template<class F>
constexpr
auto
transform(F&& f) const &&;

» more... Returns an optional containing the result of applying f to the stored value, or a default value if there is no stored value.

template<class F>
constexpr
auto
transform(F&& f) const &;

» more... Returns an optional containing the result of applying f to the stored value, or a default value if there is no stored value.

template<class F>
constexpr
auto
transform(F&& f) &&;

» more... Returns an optional containing the result of applying f to the stored value, or a default value if there is no stored value.

template<class F>
constexpr
auto
transform(F&& f) &;

» more...

Return Value

• auto
• optional

Template Parameters

Name	Description
F

Parameters

Name	Description
f