 information the compiler already has
available.
-->
<p>このような小さく匿名の関数で型をプログラマに注釈させることは煩わしいし、コンパイラがすでに利用可能な情報と大きく被っています。</p>
<!--
As with variables, we can add type annotations if we want to increase
explicitness and clarity at the cost of being more verbose than is strictly
necessary. Annotating the types for the closure we defined in Listing 13-5
would look like the definition shown