vendor/heck/src/shouty_snake.rs

   1 use crate::{transform, uppercase};
   2
   3 /// This trait defines a shouty snake case conversion.
   4 ///
   5 /// In SHOUTY_SNAKE_CASE, word boundaries are indicated by underscores and all
   6 /// words are in uppercase.
   7 ///
   8 /// ## Example:
   9 ///
  10 /// ```rust
  11 /// use heck::ShoutySnakeCase;
  12 ///
  13 /// let sentence = "That world is growing in this minute.";
  14 /// assert_eq!(sentence.to_shouty_snake_case(), "THAT_WORLD_IS_GROWING_IN_THIS_MINUTE");
  15 /// ```
  16 pub trait ShoutySnakeCase: ToOwned {
  17     /// Convert this type to shouty snake case.
  18     fn to_shouty_snake_case(&self) -> Self::Owned;
  19 }
  20
  21 /// Oh heck, ShoutySnekCase is an alias for ShoutySnakeCase. See ShoutySnakeCase
  22 /// for more documentation.
  23 pub trait ShoutySnekCase: ToOwned {
  24     /// CONVERT THIS TYPE TO SNEK CASE.
  25     #[allow(non_snake_case)]
  26     fn TO_SHOUTY_SNEK_CASE(&self) -> Self::Owned;
  27 }
  28
  29 impl<T: ?Sized + ShoutySnakeCase> ShoutySnekCase for T {
  30     fn TO_SHOUTY_SNEK_CASE(&self) -> Self::Owned {
  31         self.to_shouty_snake_case()
  32     }
  33 }
  34
  35 impl ShoutySnakeCase for str {
  36     fn to_shouty_snake_case(&self) -> Self::Owned {
  37         transform(self, uppercase, |s| s.push('_'))
  38     }
  39 }
  40
  41 #[cfg(test)]
  42 mod tests {
  43     use super::ShoutySnakeCase;
  44
  45     macro_rules! t {
  46         ($t:ident : $s1:expr => $s2:expr) => {
  47             #[test]
  48             fn $t() {
  49                 assert_eq!($s1.to_shouty_snake_case(), $s2)
  50             }
  51         };
  52     }
  53
  54     t!(test1: "CamelCase" => "CAMEL_CASE");
  55     t!(test2: "This is Human case." => "THIS_IS_HUMAN_CASE");
  56     t!(test3: "MixedUP CamelCase, with some Spaces" => "MIXED_UP_CAMEL_CASE_WITH_SOME_SPACES");
  57     t!(test4: "mixed_up_snake_case with some _spaces" => "MIXED_UP_SNAKE_CASE_WITH_SOME_SPACES");
  58     t!(test5: "kebab-case" => "KEBAB_CASE");
  59     t!(test6: "SHOUTY_SNAKE_CASE" => "SHOUTY_SNAKE_CASE");
  60     t!(test7: "snake_case" => "SNAKE_CASE");
  61     t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "THIS_CONTAINS_ALL_KINDS_OF_WORD_BOUNDARIES");
  62     t!(test9: "XΣXΣ baﬄe" => "XΣXΣ_BAFFLE");
  63     t!(test10: "XMLHttpRequest" => "XML_HTTP_REQUEST");
  64 }