1 files changed, 70 insertions, 0 deletions

diff --git a/third_party/rust/heck/src/kebab.rs b/third_party/rust/heck/src/kebab.rs
new file mode 100644
index 0000000000..6cce5a56bb
--- /dev/null
+++ b/third_party/rust/heck/src/kebab.rs
@@ -0,0 +1,70 @@
+use std::fmt;
+
+use crate::{lowercase, transform};
+
+/// This trait defines a kebab case conversion.
+///
+/// In kebab-case, word boundaries are indicated by hyphens.
+///
+/// ## Example:
+///
+/// ```rust
+/// use heck::ToKebabCase;
+///
+/// let sentence = "We are going to inherit the earth.";
+/// assert_eq!(sentence.to_kebab_case(), "we-are-going-to-inherit-the-earth");
+/// ```
+pub trait ToKebabCase: ToOwned {
+    /// Convert this type to kebab case.
+    fn to_kebab_case(&self) -> Self::Owned;
+}
+
+impl ToKebabCase for str {
+    fn to_kebab_case(&self) -> Self::Owned {
+        AsKebabCase(self).to_string()
+    }
+}
+
+/// This wrapper performs a kebab case conversion in [`fmt::Display`].
+///
+/// ## Example:
+///
+/// ```
+/// use heck::AsKebabCase;
+///
+/// let sentence = "We are going to inherit the earth.";
+/// assert_eq!(format!("{}", AsKebabCase(sentence)), "we-are-going-to-inherit-the-earth");
+/// ```
+pub struct AsKebabCase<T: AsRef<str>>(pub T);
+
+impl<T: AsRef<str>> fmt::Display for AsKebabCase<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        transform(self.0.as_ref(), lowercase, |f| write!(f, "-"), f)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::ToKebabCase;
+
+    macro_rules! t {
+        ($t:ident : $s1:expr => $s2:expr) => {
+            #[test]
+            fn $t() {
+                assert_eq!($s1.to_kebab_case(), $s2)
+            }
+        };
+    }
+
+    t!(test1: "CamelCase" => "camel-case");
+    t!(test2: "This is Human case." => "this-is-human-case");
+    t!(test3: "MixedUP CamelCase, with some Spaces" => "mixed-up-camel-case-with-some-spaces");
+    t!(test4: "mixed_up_ snake_case with some _spaces" => "mixed-up-snake-case-with-some-spaces");
+    t!(test5: "kebab-case" => "kebab-case");
+    t!(test6: "SHOUTY_SNAKE_CASE" => "shouty-snake-case");
+    t!(test7: "snake_case" => "snake-case");
+    t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "this-contains-all-kinds-of-word-boundaries");
+    #[cfg(feature = "unicode")]
+    t!(test9: "XΣXΣ baffle" => "xσxς-baffle");
+    t!(test10: "XMLHttpRequest" => "xml-http-request");
+}