beman::optional::optional::transform

Returns an optional containing the result of applying f to the contained value, or an empty optional if there is no contained value.

Synopses

Declared in <beman/optional/optional.hpp>

Returns an optional containing the result of applying f to the contained value, or an empty optional if there is no contained value.

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

Returns an optional containing the result of applying f to the contained value, or an empty optional if there is no contained value.

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

Returns an optional containing the result of applying f to the contained value, or an empty optional if there is no contained value.

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

Returns an optional containing the result of applying f to the contained value, or an empty optional if there is no contained value.

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

Name	Description
f	An invocable to apply to the contained value.

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