Applies a function to the contained value if there is one.
<beman/optional/optional.hpp>
template<class F>
constexpr
auto
and_then(F&& f) &&;
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.
| Name | Description |
|---|---|
| F | The type of the invocable |
| Name | Description |
|---|---|
| f | The invocable to apply to the contained value |