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use std::fmt;
use crate::{transform, uppercase};
/// This trait defines a shouty kebab case conversion.
///
/// In SHOUTY-KEBAB-CASE, word boundaries are indicated by hyphens and all
/// words are in uppercase.
///
/// ## Example:
///
/// ```rust
/// use heck::ToShoutyKebabCase;
///
/// let sentence = "We are going to inherit the earth.";
/// assert_eq!(sentence.to_shouty_kebab_case(), "WE-ARE-GOING-TO-INHERIT-THE-EARTH");
/// ```
pub trait ToShoutyKebabCase: ToOwned {
/// Convert this type to shouty kebab case.
fn to_shouty_kebab_case(&self) -> Self::Owned;
}
impl ToShoutyKebabCase for str {
fn to_shouty_kebab_case(&self) -> Self::Owned {
AsShoutyKebabCase(self).to_string()
}
}
/// This wrapper performs a kebab case conversion in [`fmt::Display`].
///
/// ## Example:
///
/// ```
/// use heck::AsShoutyKebabCase;
///
/// let sentence = "We are going to inherit the earth.";
/// assert_eq!(format!("{}", AsShoutyKebabCase(sentence)), "WE-ARE-GOING-TO-INHERIT-THE-EARTH");
/// ```
pub struct AsShoutyKebabCase<T: AsRef<str>>(pub T);
impl<T: AsRef<str>> fmt::Display for AsShoutyKebabCase<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
transform(self.0.as_ref(), uppercase, |f| write!(f, "-"), f)
}
}
#[cfg(test)]
mod tests {
use super::ToShoutyKebabCase;
macro_rules! t {
($t:ident : $s1:expr => $s2:expr) => {
#[test]
fn $t() {
assert_eq!($s1.to_shouty_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");
t!(test11: "SHOUTY-KEBAB-CASE" => "SHOUTY-KEBAB-CASE");
}