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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;
//! ```

use std::ops::Not;

/// A trait providing the `sike` method to any negatable type.
///
/// # Example
///
/// ```
/// use sike::Sike;
///
/// assert_eq!(true.sike(), false);
///
/// let x: u8 = 2;
/// assert_eq!(x.sike(), 253);
/// ```
pub trait Sike {
    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());
    }
}