\begin{frame}[fragile]

\frametitle{Function Pointers}

Functions coerce to the type \mintinline{rust}|fn| (with \textbf{a lowercase f}), not to be confused with the \mintinline{rust}|Fn| \textbf{closure trait}. The \mintinline{rust}|fn| type is called a function pointer. Passing functions with function pointers will allow you to use functions as arguments to other functions.

\inputminted{rust}{./code/fn1.rs}

\end{frame}

\begin{frame}[fragile]

\frametitle{Returning Closures}

Closures are represented by traits, which means you can’t return closures directly. In most cases where you might want to return a trait, you can instead use the concrete type that implements the trait as the return value of the function. However, you can’t do that with closures because they don’t have a concrete type that is returnable;

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