Applies a function to the contained value if there is one.
Synopsis
Declared in <beman/optional/optional.hpp>
template<class F>
constexpr
optional<std::invoke_result_t<F, T&>>
transform(F&& f) const;Description
The return type is the same as std::invoke_result_t<F, T&>, but wrapped in an optional.
Return Value
optional<std::invoke_result_t<F, T&>>
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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