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//! Sike adds a fun convenience method to any type which can be negated with
//! the negation operator `!`, called `sike`. To use the method, just import
//! the `Sike` trait like so:
//!
//! ```
//! use sike::Sike;
//! ```
//!
//! This adds the `sike` method to anything which can be negated, giving you
//! a more entertaining way to do the negation.
//!
//! ```
//! # use sike::Sike;
//! assert_eq!(true.sike(), false);
//! ```
//!
//! You can also use `sike` method on types like `u8`:
//!
//! ```
//! # use sike::Sike;
//! assert_eq!((2 as u8).sike(), 253);
//! ```

use std::ops::Not;

/// A trait providing the `sike` method to any negatable type.
///
/// Sike is equivalent to negation, but is a cooler name.
///
/// # Example
///
/// ```
/// # use sike::Sike;
/// assert_eq!(true.sike(), false);
/// ```
///
/// ```
/// # use sike::Sike;
/// assert_eq!((2 as u8).sike(), 253);
/// ```
pub trait Sike: Not {
    type SikeOutput;

    #[must_use]
    fn sike(self) -> Self::SikeOutput;
}

impl<T: Not> Sike for T {
    type SikeOutput = <Self as Not>::Output;

    fn sike(self) -> Self::SikeOutput {
        self.not()
    }
}

#[cfg(test)]
mod tests {
    use crate::Sike;

    #[test]
    fn works_for_bool() {
        assert_eq!(true, false.sike());
        assert_eq!(false, true.sike());
    }

    #[test]
    fn works_for_u8() {
        assert_eq!((2 as u8).sike(), 253);
    }
}