如何在不將新行插入原始字符串的情況下包裝原始字符串？

Question

我有一個非常長的原始字符串文字。是否有可能跨多行分割而不添加換行符到字符串？

file.write(r#"This is an example of a line which is well over 100 characters in length. Id like to know if its possible to wrap it! Now some characters to justify using a raw string \foo\bar\baz :)"#) 

在Python和C中，例如，您可以簡單地將其寫爲多個字符串文字。

# "some string" 
(r"some " 
r"string") 

是否有可能在Rust中做類似的事情？

Answer 1

雖然原始字符串字面量不支持這一點，它可以使用concat! macro來實現：

let a = concat!(
    r#"some very "#, 
    r#"long string "#, 
    r#"split over lines"#); 

let b = r#"some very long string split over lines"#; 
assert_eq!(a, b);