Comments

1588 ワード

https://doc.rust-lang.org/rust-by-example/hello/comment.html
すべてのプログラムにはコメントが必要ですが、RUSTはいくつかの異なるタイプをサポートしています.
  • コンパイラが無視する一般コメント
  • //行末行注記
  • /*ブロックコメント*/
  • HTMLライブラリドキュメント解析ドキュメントコメント
  • //以下の項目に対してライブラリ文書を生成する
  • //! ブロックのライブラリドキュメントを作成!//
  • fn main() {
        // This is an example of a line comment
        // There are two slashes at the beginning of the line
        // And nothing written inside these will be read by the compiler
    
        // println!("Hello, world!");
    
        // Run it. See? Now try deleting the two slashes, and run it again.
    
        /* 
         * This is another type of comment, a block comment. In general,
         * line comments are the recommended comment style. But
         * block comments are extremely useful for temporarily disabling
         * chunks of code. /* Block comments can be /* nested, */ */
         * so it takes only a few keystrokes to comment out everything
         * in this main() function. /*/*/* Try it yourself! */*/*/
         */
    
        /*
        Note: The previous column of `*` was entirely for style. There's
        no actual need for it.
        */
    
        // You can manipulate expressions more easily with block comments
        // than with line comments. Try deleting the comment delimiters
        // to change the result:
        let x = 5 + /* 90 + */ 5;
        println!("Is `x` 10 or 100? x = {}", x);
    }