ct results in this error:
-->
<p><code>cargo clippy</code>をこのプロジェクトに実行すると次のエラーを得ます：</p>
<pre><code class="language-text">error: approximate value of `f{32, 64}::consts::PI` found. Consider using it directly
 --&gt; src/main.rs:2:13
  |
2 |     let x = 3.1415;
  |             ^^^^^^
  |
  = note: #[deny(clippy::approx_constant)] on by default
  = help: for further information visit https://rust-lang-nursery.github.io/rust-clippy/master/index.html#approx_const