1 files changed, 26 insertions, 5 deletions

diff --git a/src/kebab.rs b/src/kebab.rs
index 75e5978..6cce5a5 100644
--- a/src/kebab.rs
+++ b/src/kebab.rs
@@ -1,3 +1,5 @@
+use std::fmt;
+
 use crate::{lowercase, transform};
 
 /// This trait defines a kebab case conversion.
@@ -7,25 +9,43 @@ use crate::{lowercase, transform};
 /// ## Example:
 ///
 /// ```rust
-/// use heck::KebabCase;
+/// 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 KebabCase: ToOwned {
+pub trait ToKebabCase: ToOwned {
     /// Convert this type to kebab case.
     fn to_kebab_case(&self) -> Self::Owned;
 }
 
-impl KebabCase for str {
+impl ToKebabCase for str {
     fn to_kebab_case(&self) -> Self::Owned {
-        transform(self, lowercase, |s| s.push('-'))
+        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::KebabCase;
+    use super::ToKebabCase;
 
     macro_rules! t {
         ($t:ident : $s1:expr => $s2:expr) => {
@@ -44,6 +64,7 @@ mod tests {
     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");
 }