beman::optional::optional::and_then

Applies a function to the contained value if there is one.

Synopsis

Declared in <beman/optional/optional.hpp>

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

Description

The return type is the same as std::invoke_result_t<F, T&>, but wrapped in an optional. The function f must return an optional type.

Return Value

auto

Template Parameters

Name	Description
F	The type of the invocable

Parameters

Name	Description
f	The invocable to apply to the contained value

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